./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_insert_unequal.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-simple/sll2n_insert_unequal.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 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 03:29:43,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 03:29:43,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 03:29:43,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 03:29:43,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 03:29:43,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 03:29:43,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 03:29:43,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 03:29:43,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 03:29:43,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 03:29:43,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 03:29:43,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 03:29:43,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 03:29:43,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 03:29:43,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 03:29:43,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 03:29:43,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 03:29:43,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 03:29:43,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 03:29:43,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 03:29:43,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 03:29:43,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 03:29:43,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 03:29:43,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 03:29:43,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 03:29:43,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 03:29:43,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 03:29:43,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 03:29:43,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 03:29:43,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 03:29:43,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 03:29:43,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 03:29:43,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 03:29:43,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 03:29:43,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 03:29:43,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 03:29:43,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 03:29:43,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 03:29:43,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 03:29:43,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 03:29:43,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 03:29:43,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 03:29:43,844 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 03:29:43,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 03:29:43,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 03:29:43,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 03:29:43,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 03:29:43,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 03:29:43,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 03:29:43,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 03:29:43,847 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 03:29:43,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 03:29:43,849 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 03:29:43,849 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 03:29:43,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 03:29:43,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 03:29:43,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 03:29:43,850 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 03:29:43,850 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 03:29:43,850 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 03:29:43,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 03:29:43,850 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 03:29:43,850 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 03:29:43,851 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 03:29:43,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 03:29:43,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 03:29:43,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 03:29:43,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:29:43,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 03:29:43,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 03:29:43,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 03:29:43,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 03:29:43,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 03:29:43,853 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 03:29:43,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 03:29:43,853 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 03:29:43,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2023-02-17 03:29:44,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 03:29:44,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 03:29:44,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 03:29:44,108 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 03:29:44,108 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 03:29:44,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2023-02-17 03:29:45,443 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 03:29:45,673 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 03:29:45,674 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2023-02-17 03:29:45,683 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4163f599f/93d3fae0db0644aba8ffad26e07797b9/FLAGd2b44d4ef [2023-02-17 03:29:45,696 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4163f599f/93d3fae0db0644aba8ffad26e07797b9 [2023-02-17 03:29:45,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 03:29:45,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 03:29:45,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 03:29:45,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 03:29:45,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 03:29:45,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:29:45" (1/1) ... [2023-02-17 03:29:45,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201da76e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:45, skipping insertion in model container [2023-02-17 03:29:45,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:29:45" (1/1) ... [2023-02-17 03:29:45,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 03:29:45,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 03:29:46,036 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-simple/sll2n_insert_unequal.i[24620,24633] [2023-02-17 03:29:46,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:29:46,050 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 03:29:46,086 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-simple/sll2n_insert_unequal.i[24620,24633] [2023-02-17 03:29:46,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:29:46,116 INFO L208 MainTranslator]: Completed translation [2023-02-17 03:29:46,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46 WrapperNode [2023-02-17 03:29:46,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 03:29:46,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 03:29:46,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 03:29:46,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 03:29:46,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,168 INFO L138 Inliner]: procedures = 128, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2023-02-17 03:29:46,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 03:29:46,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 03:29:46,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 03:29:46,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 03:29:46,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,201 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 03:29:46,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 03:29:46,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 03:29:46,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 03:29:46,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (1/1) ... [2023-02-17 03:29:46,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:29:46,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:29:46,270 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 03:29:46,278 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 03:29:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 03:29:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 03:29:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-17 03:29:46,299 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-17 03:29:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 03:29:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 03:29:46,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 03:29:46,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 03:29:46,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 03:29:46,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 03:29:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 03:29:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 03:29:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 03:29:46,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 03:29:46,442 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 03:29:46,444 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 03:29:46,665 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 03:29:46,670 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 03:29:46,673 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-17 03:29:46,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:29:46 BoogieIcfgContainer [2023-02-17 03:29:46,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 03:29:46,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 03:29:46,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 03:29:46,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 03:29:46,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 03:29:45" (1/3) ... [2023-02-17 03:29:46,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467860fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:29:46, skipping insertion in model container [2023-02-17 03:29:46,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:29:46" (2/3) ... [2023-02-17 03:29:46,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467860fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:29:46, skipping insertion in model container [2023-02-17 03:29:46,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:29:46" (3/3) ... [2023-02-17 03:29:46,681 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2023-02-17 03:29:46,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 03:29:46,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-02-17 03:29:46,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 03:29:46,751 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;@216dd058, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 03:29:46,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-02-17 03:29:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 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 03:29:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 03:29:46,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:46,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:46,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:46,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951417, now seen corresponding path program 1 times [2023-02-17 03:29:46,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:46,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422548147] [2023-02-17 03:29:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:46,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:46,930 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 03:29:46,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:46,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422548147] [2023-02-17 03:29:46,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422548147] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:46,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:46,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:29:46,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136599766] [2023-02-17 03:29:46,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:46,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:29:46,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:46,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:29:46,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:29:46,972 INFO L87 Difference]: Start difference. First operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:29:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:47,078 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2023-02-17 03:29:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:29:47,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-17 03:29:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:47,085 INFO L225 Difference]: With dead ends: 97 [2023-02-17 03:29:47,085 INFO L226 Difference]: Without dead ends: 94 [2023-02-17 03:29:47,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:29:47,088 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 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 03:29:47,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:29:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-17 03:29:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-02-17 03:29:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.8333333333333333) internal successors, (99), 90 states have internal predecessors, (99), 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 03:29:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2023-02-17 03:29:47,123 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 7 [2023-02-17 03:29:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:47,124 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2023-02-17 03:29:47,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:29:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2023-02-17 03:29:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 03:29:47,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:47,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:47,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 03:29:47,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:47,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:47,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951418, now seen corresponding path program 1 times [2023-02-17 03:29:47,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:47,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312470042] [2023-02-17 03:29:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:47,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:47,201 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 03:29:47,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:47,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312470042] [2023-02-17 03:29:47,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312470042] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:47,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:47,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:29:47,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504015116] [2023-02-17 03:29:47,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:47,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:29:47,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:29:47,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:29:47,204 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:29:47,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:47,251 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2023-02-17 03:29:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:29:47,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-17 03:29:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:47,252 INFO L225 Difference]: With dead ends: 92 [2023-02-17 03:29:47,253 INFO L226 Difference]: Without dead ends: 92 [2023-02-17 03:29:47,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:29:47,254 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:47,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 158 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:29:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-17 03:29:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-02-17 03:29:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 88 states have internal predecessors, (97), 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 03:29:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2023-02-17 03:29:47,273 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 7 [2023-02-17 03:29:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:47,274 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2023-02-17 03:29:47,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:29:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2023-02-17 03:29:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 03:29:47,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:47,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:47,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 03:29:47,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:47,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:47,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390976, now seen corresponding path program 1 times [2023-02-17 03:29:47,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:47,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178086183] [2023-02-17 03:29:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:47,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:47,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:47,445 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 03:29:47,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:47,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178086183] [2023-02-17 03:29:47,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178086183] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:47,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:47,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 03:29:47,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186416710] [2023-02-17 03:29:47,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:47,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:29:47,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:29:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:29:47,448 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 03:29:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:47,652 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2023-02-17 03:29:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:29:47,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 03:29:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:47,654 INFO L225 Difference]: With dead ends: 96 [2023-02-17 03:29:47,654 INFO L226 Difference]: Without dead ends: 96 [2023-02-17 03:29:47,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:29:47,655 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 11 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:47,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 369 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:29:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-17 03:29:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2023-02-17 03:29:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 87 states have internal predecessors, (96), 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 03:29:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2023-02-17 03:29:47,660 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 13 [2023-02-17 03:29:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:47,661 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2023-02-17 03:29:47,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 03:29:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2023-02-17 03:29:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 03:29:47,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:47,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:47,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 03:29:47,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:47,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390975, now seen corresponding path program 1 times [2023-02-17 03:29:47,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:47,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291566068] [2023-02-17 03:29:47,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:47,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:47,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:47,951 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 03:29:47,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:47,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291566068] [2023-02-17 03:29:47,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291566068] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:47,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:47,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 03:29:47,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048011045] [2023-02-17 03:29:47,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:47,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:29:47,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:29:47,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:29:47,955 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 03:29:48,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:48,096 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2023-02-17 03:29:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:29:48,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 03:29:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:48,099 INFO L225 Difference]: With dead ends: 95 [2023-02-17 03:29:48,099 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 03:29:48,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:29:48,107 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 9 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:48,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 385 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:29:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 03:29:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2023-02-17 03:29:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 86 states have internal predecessors, (95), 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 03:29:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2023-02-17 03:29:48,119 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 13 [2023-02-17 03:29:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:48,119 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2023-02-17 03:29:48,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 03:29:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2023-02-17 03:29:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 03:29:48,120 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:48,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:48,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 03:29:48,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:48,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2068593344, now seen corresponding path program 1 times [2023-02-17 03:29:48,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:48,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326557918] [2023-02-17 03:29:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:48,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:48,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:29:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:48,186 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 03:29:48,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:48,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326557918] [2023-02-17 03:29:48,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326557918] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:48,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:48,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:29:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852117427] [2023-02-17 03:29:48,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:48,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:29:48,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:29:48,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:29:48,189 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 4 states, 4 states have (on average 3.25) 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 03:29:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:48,243 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2023-02-17 03:29:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:29:48,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) 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 03:29:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:48,245 INFO L225 Difference]: With dead ends: 96 [2023-02-17 03:29:48,245 INFO L226 Difference]: Without dead ends: 96 [2023-02-17 03:29:48,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:29:48,247 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:48,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 234 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:29:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-17 03:29:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2023-02-17 03:29:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 87 states have internal predecessors, (96), 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 03:29:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2023-02-17 03:29:48,262 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 15 [2023-02-17 03:29:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:48,262 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2023-02-17 03:29:48,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) 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 03:29:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2023-02-17 03:29:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 03:29:48,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:48,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:48,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 03:29:48,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:48,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1769802942, now seen corresponding path program 1 times [2023-02-17 03:29:48,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:48,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184506820] [2023-02-17 03:29:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:48,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:48,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:48,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-17 03:29:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:29:48,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:48,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184506820] [2023-02-17 03:29:48,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184506820] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:29:48,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045944730] [2023-02-17 03:29:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:48,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:29:48,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:29:48,344 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:29:48,359 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 03:29:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:48,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 03:29:48,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:29:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:29:48,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:29:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:29:48,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045944730] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:29:48,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:29:48,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-02-17 03:29:48,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127207557] [2023-02-17 03:29:48,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:29:48,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 03:29:48,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:48,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 03:29:48,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:29:48,494 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 03:29:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:48,549 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2023-02-17 03:29:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 03:29:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-02-17 03:29:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:48,550 INFO L225 Difference]: With dead ends: 97 [2023-02-17 03:29:48,550 INFO L226 Difference]: Without dead ends: 97 [2023-02-17 03:29:48,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:29:48,551 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:48,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 323 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:29:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-17 03:29:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-02-17 03:29:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 92 states have internal predecessors, (101), 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 03:29:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2023-02-17 03:29:48,554 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 28 [2023-02-17 03:29:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:48,554 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2023-02-17 03:29:48,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 03:29:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2023-02-17 03:29:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 03:29:48,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:48,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:48,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 03:29:48,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-17 03:29:48,762 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:48,762 INFO L85 PathProgramCache]: Analyzing trace with hash -888530816, now seen corresponding path program 2 times [2023-02-17 03:29:48,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:48,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499178532] [2023-02-17 03:29:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:49,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:49,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:49,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-17 03:29:49,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:49,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499178532] [2023-02-17 03:29:49,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499178532] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:49,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:49,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 03:29:49,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35382768] [2023-02-17 03:29:49,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:49,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:29:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:29:49,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:29:49,187 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 03:29:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:49,291 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2023-02-17 03:29:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:29:49,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 41 [2023-02-17 03:29:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:49,292 INFO L225 Difference]: With dead ends: 105 [2023-02-17 03:29:49,293 INFO L226 Difference]: Without dead ends: 105 [2023-02-17 03:29:49,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:29:49,293 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 146 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:49,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 168 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:29:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-17 03:29:49,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2023-02-17 03:29:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 88 states have internal predecessors, (97), 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 03:29:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2023-02-17 03:29:49,296 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 41 [2023-02-17 03:29:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:49,296 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2023-02-17 03:29:49,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 03:29:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2023-02-17 03:29:49,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 03:29:49,297 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:49,297 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:49,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 03:29:49,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:49,298 INFO L85 PathProgramCache]: Analyzing trace with hash -888530815, now seen corresponding path program 1 times [2023-02-17 03:29:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:49,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48128566] [2023-02-17 03:29:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:49,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:49,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:49,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:49,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 03:29:49,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:49,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48128566] [2023-02-17 03:29:49,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48128566] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:29:49,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853083100] [2023-02-17 03:29:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:49,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:29:49,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:29:49,722 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 03:29:49,725 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 03:29:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:49,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 03:29:49,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:29:49,850 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 03:29:49,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-17 03:29:49,877 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_452 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_452))))) is different from true [2023-02-17 03:29:49,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:29:49,897 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 03:29:49,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-17 03:29:49,907 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_453 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_453) |c_#length|)))) is different from true [2023-02-17 03:29:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:29:49,925 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 03:29:49,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-17 03:29:49,940 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 03:29:49,943 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_454 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_454) |c_#length|)))) is different from true [2023-02-17 03:29:49,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:29:49,962 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 32 treesize of output 46 [2023-02-17 03:29:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 18 not checked. [2023-02-17 03:29:49,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:29:50,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853083100] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:29:50,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 03:29:50,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2023-02-17 03:29:50,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490566234] [2023-02-17 03:29:50,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 03:29:50,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 03:29:50,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:50,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 03:29:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=147, Unknown=3, NotChecked=78, Total=272 [2023-02-17 03:29:50,036 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 15 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 03:29:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:50,241 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2023-02-17 03:29:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 03:29:50,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2023-02-17 03:29:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:50,242 INFO L225 Difference]: With dead ends: 101 [2023-02-17 03:29:50,242 INFO L226 Difference]: Without dead ends: 101 [2023-02-17 03:29:50,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=215, Unknown=3, NotChecked=96, Total=380 [2023-02-17 03:29:50,243 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 301 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:50,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 198 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 228 Invalid, 0 Unknown, 303 Unchecked, 0.2s Time] [2023-02-17 03:29:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-17 03:29:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2023-02-17 03:29:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.55) internal successors, (93), 84 states have internal predecessors, (93), 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 03:29:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-02-17 03:29:50,245 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 41 [2023-02-17 03:29:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:50,246 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-02-17 03:29:50,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 03:29:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-02-17 03:29:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 03:29:50,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:50,246 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:50,252 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 03:29:50,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-17 03:29:50,452 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash -338093919, now seen corresponding path program 1 times [2023-02-17 03:29:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:50,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568427813] [2023-02-17 03:29:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:50,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:50,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:50,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:50,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:29:50,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568427813] [2023-02-17 03:29:50,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568427813] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:29:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956089794] [2023-02-17 03:29:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:50,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:29:50,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:29:50,809 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 03:29:50,836 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 03:29:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:50,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-17 03:29:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:29:51,015 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 9 treesize of output 5 [2023-02-17 03:29:51,079 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_614 (Array Int Int)) (|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (<= |node_create_~temp~0#1.base| (+ (- 1) |c_#StackHeapBarrier|)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_614)))) is different from true [2023-02-17 03:29:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:29:51,091 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 16 treesize of output 18 [2023-02-17 03:29:51,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:29:51,094 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 23 treesize of output 56 [2023-02-17 03:29:51,110 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 17 treesize of output 9 [2023-02-17 03:29:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 03:29:51,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:29:51,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956089794] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:51,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:29:51,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 24 [2023-02-17 03:29:51,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992976564] [2023-02-17 03:29:51,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:51,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 03:29:51,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:51,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 03:29:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=483, Unknown=1, NotChecked=44, Total=600 [2023-02-17 03:29:51,125 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 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 03:29:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:51,406 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2023-02-17 03:29:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 03:29:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 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 44 [2023-02-17 03:29:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:51,407 INFO L225 Difference]: With dead ends: 158 [2023-02-17 03:29:51,408 INFO L226 Difference]: Without dead ends: 158 [2023-02-17 03:29:51,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=716, Unknown=1, NotChecked=56, Total=930 [2023-02-17 03:29:51,408 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 504 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:51,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 343 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 393 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2023-02-17 03:29:51,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-17 03:29:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 91. [2023-02-17 03:29:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.564516129032258) internal successors, (97), 86 states have internal predecessors, (97), 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 03:29:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2023-02-17 03:29:51,411 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 44 [2023-02-17 03:29:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:51,412 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2023-02-17 03:29:51,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 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 03:29:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2023-02-17 03:29:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 03:29:51,413 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:51,413 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:51,431 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 03:29:51,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:29:51,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:51,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash -338093918, now seen corresponding path program 1 times [2023-02-17 03:29:51,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:51,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964759158] [2023-02-17 03:29:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:51,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:51,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:51,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:51,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:29:52,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:52,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964759158] [2023-02-17 03:29:52,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964759158] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:29:52,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279157686] [2023-02-17 03:29:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:52,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:29:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:29:52,109 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 03:29:52,112 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 03:29:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 03:29:52,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:29:52,347 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 27 treesize of output 19 [2023-02-17 03:29:52,350 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 23 treesize of output 15 [2023-02-17 03:29:52,417 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_773 (Array Int Int)) (v_ArrVal_772 (Array Int Int))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_772)) (<= |node_create_~temp~0#1.base| (+ (- 1) |c_#StackHeapBarrier|)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_773)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-17 03:29:52,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:29:52,450 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 33 treesize of output 33 [2023-02-17 03:29:52,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:29:52,454 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 33 treesize of output 33 [2023-02-17 03:29:52,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:29:52,458 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 26 treesize of output 21 [2023-02-17 03:29:52,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:29:52,461 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 15 treesize of output 19 [2023-02-17 03:29:52,480 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 03:29:52,481 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 18 [2023-02-17 03:29:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 03:29:52,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:29:52,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279157686] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:52,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:29:52,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17] total 27 [2023-02-17 03:29:52,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071863884] [2023-02-17 03:29:52,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:52,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 03:29:52,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:52,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 03:29:52,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=630, Unknown=1, NotChecked=50, Total=756 [2023-02-17 03:29:52,532 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 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 03:29:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:52,806 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2023-02-17 03:29:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 03:29:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 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 44 [2023-02-17 03:29:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:52,808 INFO L225 Difference]: With dead ends: 147 [2023-02-17 03:29:52,808 INFO L226 Difference]: Without dead ends: 147 [2023-02-17 03:29:52,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=999, Unknown=1, NotChecked=64, Total=1190 [2023-02-17 03:29:52,809 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 227 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:52,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 378 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 432 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2023-02-17 03:29:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-17 03:29:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2023-02-17 03:29:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 86 states have internal predecessors, (96), 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 03:29:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2023-02-17 03:29:52,811 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 44 [2023-02-17 03:29:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:52,811 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2023-02-17 03:29:52,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 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 03:29:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2023-02-17 03:29:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 03:29:52,812 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:52,812 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:52,833 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 03:29:53,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:29:53,018 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1890978520, now seen corresponding path program 1 times [2023-02-17 03:29:53,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:53,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595044643] [2023-02-17 03:29:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-17 03:29:53,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595044643] [2023-02-17 03:29:53,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595044643] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:53,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:53,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:29:53,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066649808] [2023-02-17 03:29:53,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:53,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:29:53,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:29:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:29:53,065 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:29:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:53,118 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2023-02-17 03:29:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:29:53,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-02-17 03:29:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:53,119 INFO L225 Difference]: With dead ends: 143 [2023-02-17 03:29:53,119 INFO L226 Difference]: Without dead ends: 143 [2023-02-17 03:29:53,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:29:53,120 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 58 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:53,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 211 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:29:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-17 03:29:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 92. [2023-02-17 03:29:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 87 states have internal predecessors, (97), 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 03:29:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2023-02-17 03:29:53,123 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 45 [2023-02-17 03:29:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:53,123 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2023-02-17 03:29:53,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:29:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2023-02-17 03:29:53,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 03:29:53,128 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:53,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:53,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 03:29:53,128 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1509213013, now seen corresponding path program 1 times [2023-02-17 03:29:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:53,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198579443] [2023-02-17 03:29:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:53,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 03:29:53,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:53,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198579443] [2023-02-17 03:29:53,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198579443] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:53,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:53,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 03:29:53,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712250057] [2023-02-17 03:29:53,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:53,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:29:53,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:53,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:29:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:29:53,222 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:29:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:53,335 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2023-02-17 03:29:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:29:53,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2023-02-17 03:29:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:53,336 INFO L225 Difference]: With dead ends: 103 [2023-02-17 03:29:53,336 INFO L226 Difference]: Without dead ends: 103 [2023-02-17 03:29:53,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:29:53,337 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 64 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:53,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 263 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:29:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-17 03:29:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2023-02-17 03:29:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 86 states have internal predecessors, (96), 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 03:29:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2023-02-17 03:29:53,340 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 46 [2023-02-17 03:29:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:53,341 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2023-02-17 03:29:53,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:29:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2023-02-17 03:29:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 03:29:53,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:53,342 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:53,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 03:29:53,342 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:53,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:53,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1509213014, now seen corresponding path program 1 times [2023-02-17 03:29:53,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:53,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054974312] [2023-02-17 03:29:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:53,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 03:29:53,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:53,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054974312] [2023-02-17 03:29:53,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054974312] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:29:53,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033180618] [2023-02-17 03:29:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:53,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:29:53,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:29:53,453 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 03:29:53,455 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 03:29:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 03:29:53,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:29:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-17 03:29:53,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:29:53,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033180618] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:53,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:29:53,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-02-17 03:29:53,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172978437] [2023-02-17 03:29:53,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:53,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:29:53,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:29:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:29:53,623 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 03:29:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:53,633 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2023-02-17 03:29:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:29:53,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 46 [2023-02-17 03:29:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:53,634 INFO L225 Difference]: With dead ends: 90 [2023-02-17 03:29:53,634 INFO L226 Difference]: Without dead ends: 90 [2023-02-17 03:29:53,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:29:53,634 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 76 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:53,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 171 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:29:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-17 03:29:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-02-17 03:29:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 85 states have internal predecessors, (94), 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 03:29:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2023-02-17 03:29:53,636 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 46 [2023-02-17 03:29:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:53,637 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2023-02-17 03:29:53,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 03:29:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2023-02-17 03:29:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 03:29:53,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:53,637 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:29:53,645 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 03:29:53,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 03:29:53,843 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash -457619027, now seen corresponding path program 1 times [2023-02-17 03:29:53,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:53,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016348586] [2023-02-17 03:29:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:53,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 03:29:53,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:53,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016348586] [2023-02-17 03:29:53,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016348586] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:29:53,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539928293] [2023-02-17 03:29:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:53,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:29:53,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:29:53,974 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 03:29:54,017 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 03:29:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 03:29:54,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:29:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-17 03:29:54,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:29:54,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539928293] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:54,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:29:54,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2023-02-17 03:29:54,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915223603] [2023-02-17 03:29:54,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:54,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:29:54,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:54,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:29:54,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:29:54,209 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 03:29:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:54,225 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2023-02-17 03:29:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 03:29:54,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 47 [2023-02-17 03:29:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:54,226 INFO L225 Difference]: With dead ends: 87 [2023-02-17 03:29:54,226 INFO L226 Difference]: Without dead ends: 87 [2023-02-17 03:29:54,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 03:29:54,227 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 193 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:54,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 113 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:29:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-17 03:29:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-02-17 03:29:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 82 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 03:29:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2023-02-17 03:29:54,229 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 47 [2023-02-17 03:29:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:54,230 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2023-02-17 03:29:54,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 03:29:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2023-02-17 03:29:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 03:29:54,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:54,231 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 03:29:54,253 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 03:29:54,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:29:54,437 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:54,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:54,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289572, now seen corresponding path program 1 times [2023-02-17 03:29:54,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:54,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750696023] [2023-02-17 03:29:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:54,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-17 03:29:54,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:54,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750696023] [2023-02-17 03:29:54,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750696023] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:54,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:54,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:29:54,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009037136] [2023-02-17 03:29:54,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:54,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:29:54,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:29:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:29:54,501 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:29:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:54,574 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2023-02-17 03:29:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:29:54,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-17 03:29:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:54,576 INFO L225 Difference]: With dead ends: 98 [2023-02-17 03:29:54,576 INFO L226 Difference]: Without dead ends: 98 [2023-02-17 03:29:54,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:29:54,576 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 57 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:54,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 172 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:29:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-17 03:29:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2023-02-17 03:29:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.459016393442623) internal successors, (89), 81 states have internal predecessors, (89), 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 03:29:54,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2023-02-17 03:29:54,578 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 48 [2023-02-17 03:29:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:54,579 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2023-02-17 03:29:54,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:29:54,579 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2023-02-17 03:29:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 03:29:54,579 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:54,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 03:29:54,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-17 03:29:54,580 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:54,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289571, now seen corresponding path program 1 times [2023-02-17 03:29:54,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:54,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625109229] [2023-02-17 03:29:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:54,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-17 03:29:54,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625109229] [2023-02-17 03:29:54,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625109229] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:54,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:54,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:29:54,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699133979] [2023-02-17 03:29:54,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:54,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:29:54,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:54,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:29:54,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:29:54,652 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:29:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:54,725 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2023-02-17 03:29:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:29:54,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-17 03:29:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:54,726 INFO L225 Difference]: With dead ends: 85 [2023-02-17 03:29:54,726 INFO L226 Difference]: Without dead ends: 85 [2023-02-17 03:29:54,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:29:54,727 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 59 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:54,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 169 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:29:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-17 03:29:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-02-17 03:29:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.4426229508196722) 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 03:29:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2023-02-17 03:29:54,729 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 48 [2023-02-17 03:29:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:54,730 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2023-02-17 03:29:54,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:29:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2023-02-17 03:29:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 03:29:54,730 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:54,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 03:29:54,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 03:29:54,731 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1685271038, now seen corresponding path program 1 times [2023-02-17 03:29:54,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487408405] [2023-02-17 03:29:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:54,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 03:29:54,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:54,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487408405] [2023-02-17 03:29:54,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487408405] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:29:54,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:29:54,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 03:29:54,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120030275] [2023-02-17 03:29:54,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:29:54,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:29:54,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:29:54,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:29:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:29:54,884 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:29:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:29:54,984 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2023-02-17 03:29:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:29:54,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-02-17 03:29:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:29:54,985 INFO L225 Difference]: With dead ends: 84 [2023-02-17 03:29:54,985 INFO L226 Difference]: Without dead ends: 84 [2023-02-17 03:29:54,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:29:54,985 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 58 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:29:54,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 262 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:29:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-17 03:29:54,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-02-17 03:29:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 79 states have internal predecessors, (87), 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 03:29:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2023-02-17 03:29:54,988 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 49 [2023-02-17 03:29:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:29:54,988 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2023-02-17 03:29:54,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:29:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2023-02-17 03:29:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 03:29:54,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:29:54,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 03:29:54,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-17 03:29:54,989 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-17 03:29:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:29:54,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1171904341, now seen corresponding path program 1 times [2023-02-17 03:29:54,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:29:54,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968353605] [2023-02-17 03:29:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:54,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:29:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:55,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 03:29:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:55,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 03:29:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:55,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 03:29:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:29:55,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:29:55,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968353605] [2023-02-17 03:29:55,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968353605] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:29:55,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007311321] [2023-02-17 03:29:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:29:55,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:29:55,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:29:55,710 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 03:29:55,733 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 03:29:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:29:55,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-17 03:29:55,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:29:56,130 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 8 treesize of output 4 [2023-02-17 03:29:56,178 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1774 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1774) |c_#memory_$Pointer$.base|)) (not (= |c_node_create_~temp~0#1.base| 0))) is different from true [2023-02-17 03:29:56,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:29:56,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-02-17 03:29:56,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:29:56,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 99 [2023-02-17 03:29:57,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:29:57,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:29:57,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 80 select indices, 80 select index equivalence classes, 2 disjoint index pairs (out of 3160 index pairs), introduced 117 new quantified variables, introduced 3239 case distinctions, treesize of input 1649 treesize of output 28165