./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2n_append_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 22:25:54,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 22:25:54,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 22:25:54,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 22:25:54,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 22:25:54,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 22:25:54,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 22:25:54,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 22:25:54,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 22:25:54,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 22:25:54,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 22:25:54,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 22:25:54,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 22:25:54,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 22:25:54,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 22:25:54,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 22:25:54,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 22:25:54,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 22:25:54,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 22:25:54,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 22:25:54,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 22:25:54,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 22:25:54,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 22:25:54,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 22:25:54,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 22:25:54,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 22:25:54,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 22:25:54,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 22:25:54,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 22:25:54,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 22:25:54,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 22:25:54,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 22:25:54,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 22:25:54,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 22:25:54,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 22:25:54,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 22:25:54,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 22:25:54,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 22:25:54,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 22:25:54,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 22:25:54,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 22:25:54,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 22:25:54,788 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 22:25:54,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 22:25:54,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 22:25:54,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 22:25:54,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 22:25:54,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 22:25:54,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 22:25:54,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 22:25:54,790 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 22:25:54,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 22:25:54,790 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 22:25:54,790 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 22:25:54,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 22:25:54,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 22:25:54,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 22:25:54,791 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 22:25:54,791 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 22:25:54,791 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 22:25:54,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 22:25:54,791 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 22:25:54,791 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 22:25:54,791 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 22:25:54,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 22:25:54,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 22:25:54,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 22:25:54,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:25:54,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 22:25:54,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 22:25:54,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 22:25:54,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 22:25:54,792 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 22:25:54,792 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 22:25:54,793 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 22:25:54,793 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 22:25:54,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2023-02-15 22:25:55,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 22:25:55,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 22:25:55,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 22:25:55,075 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 22:25:55,076 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 22:25:55,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2023-02-15 22:25:56,190 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 22:25:56,445 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 22:25:56,446 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2023-02-15 22:25:56,460 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18e1064dc/a8a5f33d9a324bbb8405c6a70edbf5c8/FLAG6a746f966 [2023-02-15 22:25:56,478 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18e1064dc/a8a5f33d9a324bbb8405c6a70edbf5c8 [2023-02-15 22:25:56,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 22:25:56,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 22:25:56,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 22:25:56,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 22:25:56,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 22:25:56,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7183a275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56, skipping insertion in model container [2023-02-15 22:25:56,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 22:25:56,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 22:25:56,733 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/dll2n_append_equal.i[24333,24346] [2023-02-15 22:25:56,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:25:56,742 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 22:25:56,803 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/dll2n_append_equal.i[24333,24346] [2023-02-15 22:25:56,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:25:56,830 INFO L208 MainTranslator]: Completed translation [2023-02-15 22:25:56,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56 WrapperNode [2023-02-15 22:25:56,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 22:25:56,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 22:25:56,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 22:25:56,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 22:25:56,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,867 INFO L138 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 125 [2023-02-15 22:25:56,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 22:25:56,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 22:25:56,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 22:25:56,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 22:25:56,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,898 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 22:25:56,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 22:25:56,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 22:25:56,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 22:25:56,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (1/1) ... [2023-02-15 22:25:56,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:25:56,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:25:56,946 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) [2023-02-15 22:25:56,963 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 [2023-02-15 22:25:56,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 22:25:56,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 22:25:56,993 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-15 22:25:56,993 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-15 22:25:56,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 22:25:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 22:25:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 22:25:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 22:25:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 22:25:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 22:25:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 22:25:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 22:25:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 22:25:56,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 22:25:57,104 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 22:25:57,106 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 22:25:57,426 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 22:25:57,432 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 22:25:57,432 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 22:25:57,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:25:57 BoogieIcfgContainer [2023-02-15 22:25:57,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 22:25:57,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 22:25:57,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 22:25:57,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 22:25:57,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:25:56" (1/3) ... [2023-02-15 22:25:57,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4074e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:25:57, skipping insertion in model container [2023-02-15 22:25:57,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:25:56" (2/3) ... [2023-02-15 22:25:57,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4074e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:25:57, skipping insertion in model container [2023-02-15 22:25:57,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:25:57" (3/3) ... [2023-02-15 22:25:57,443 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2023-02-15 22:25:57,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 22:25:57,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-02-15 22:25:57,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 22:25:57,510 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;@70518a2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 22:25:57,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-02-15 22:25:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 93 states have internal predecessors, (106), 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) [2023-02-15 22:25:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 22:25:57,524 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:25:57,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:25:57,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:25:57,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:25:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1815348631, now seen corresponding path program 1 times [2023-02-15 22:25:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:25:57,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623785553] [2023-02-15 22:25:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:25:57,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:25:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:25:57,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:25:57,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623785553] [2023-02-15 22:25:57,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623785553] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:25:57,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:25:57,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:25:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057717843] [2023-02-15 22:25:57,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:25:57,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:25:57,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:25:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:25:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:25:57,835 INFO L87 Difference]: Start difference. First operand has 97 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 93 states have internal predecessors, (106), 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) [2023-02-15 22:25:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:25:57,935 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2023-02-15 22:25:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:25:57,937 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 [2023-02-15 22:25:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:25:57,944 INFO L225 Difference]: With dead ends: 94 [2023-02-15 22:25:57,944 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 22:25:57,946 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 [2023-02-15 22:25:57,948 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:25:57,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:25:57,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 22:25:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-02-15 22:25:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.88) internal successors, (94), 87 states have internal predecessors, (94), 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) [2023-02-15 22:25:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2023-02-15 22:25:57,991 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 7 [2023-02-15 22:25:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:25:57,992 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2023-02-15 22:25:57,993 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) [2023-02-15 22:25:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2023-02-15 22:25:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 22:25:57,993 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:25:57,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:25:57,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 22:25:57,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:25:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:25:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1815348632, now seen corresponding path program 1 times [2023-02-15 22:25:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:25:57,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18286881] [2023-02-15 22:25:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:25:57,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:25:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:25:58,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:25:58,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18286881] [2023-02-15 22:25:58,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18286881] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:25:58,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:25:58,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:25:58,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734482155] [2023-02-15 22:25:58,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:25:58,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:25:58,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:25:58,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:25:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:25:58,098 INFO L87 Difference]: Start difference. First operand 91 states and 98 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) [2023-02-15 22:25:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:25:58,157 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2023-02-15 22:25:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:25:58,158 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 [2023-02-15 22:25:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:25:58,159 INFO L225 Difference]: With dead ends: 88 [2023-02-15 22:25:58,159 INFO L226 Difference]: Without dead ends: 88 [2023-02-15 22:25:58,159 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 [2023-02-15 22:25:58,160 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 5 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:25:58,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 144 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:25:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-15 22:25:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-15 22:25:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.82) internal successors, (91), 84 states have internal predecessors, (91), 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) [2023-02-15 22:25:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2023-02-15 22:25:58,168 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 7 [2023-02-15 22:25:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:25:58,168 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2023-02-15 22:25:58,168 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) [2023-02-15 22:25:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2023-02-15 22:25:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 22:25:58,169 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:25:58,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:25:58,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 22:25:58,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:25:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:25:58,170 INFO L85 PathProgramCache]: Analyzing trace with hash 927333361, now seen corresponding path program 1 times [2023-02-15 22:25:58,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:25:58,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881777018] [2023-02-15 22:25:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:25:58,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:25:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:58,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:25:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:25:58,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:25:58,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881777018] [2023-02-15 22:25:58,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881777018] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:25:58,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:25:58,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:25:58,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439733877] [2023-02-15 22:25:58,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:25:58,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:25:58,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:25:58,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:25:58,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:25:58,470 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-02-15 22:25:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:25:58,657 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2023-02-15 22:25:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:25:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 14 [2023-02-15 22:25:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:25:58,663 INFO L225 Difference]: With dead ends: 91 [2023-02-15 22:25:58,664 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 22:25:58,667 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 [2023-02-15 22:25:58,670 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 16 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:25:58,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 332 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:25:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 22:25:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2023-02-15 22:25:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.78) internal successors, (89), 82 states have internal predecessors, (89), 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) [2023-02-15 22:25:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2023-02-15 22:25:58,690 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 14 [2023-02-15 22:25:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:25:58,691 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2023-02-15 22:25:58,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-02-15 22:25:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2023-02-15 22:25:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 22:25:58,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:25:58,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:25:58,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 22:25:58,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:25:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:25:58,693 INFO L85 PathProgramCache]: Analyzing trace with hash 927333360, now seen corresponding path program 1 times [2023-02-15 22:25:58,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:25:58,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849589474] [2023-02-15 22:25:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:25:58,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:25:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:58,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:25:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:25:58,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:25:58,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849589474] [2023-02-15 22:25:58,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849589474] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:25:58,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:25:58,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:25:58,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145711065] [2023-02-15 22:25:58,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:25:58,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:25:58,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:25:58,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:25:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:25:58,897 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-02-15 22:25:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:25:59,059 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-02-15 22:25:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:25:59,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 14 [2023-02-15 22:25:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:25:59,061 INFO L225 Difference]: With dead ends: 89 [2023-02-15 22:25:59,061 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 22:25:59,061 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 [2023-02-15 22:25:59,069 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 15 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:25:59,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 316 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:25:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 22:25:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2023-02-15 22:25:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.74) internal successors, (87), 80 states have internal predecessors, (87), 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) [2023-02-15 22:25:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2023-02-15 22:25:59,079 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 14 [2023-02-15 22:25:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:25:59,080 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2023-02-15 22:25:59,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-02-15 22:25:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2023-02-15 22:25:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 22:25:59,081 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:25:59,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:25:59,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 22:25:59,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:25:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:25:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1763306156, now seen corresponding path program 1 times [2023-02-15 22:25:59,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:25:59,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838197142] [2023-02-15 22:25:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:25:59,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:25:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:59,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 22:25:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:25:59,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:25:59,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838197142] [2023-02-15 22:25:59,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838197142] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:25:59,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:25:59,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:25:59,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147322984] [2023-02-15 22:25:59,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:25:59,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:25:59,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:25:59,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:25:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:25:59,149 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-02-15 22:25:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:25:59,230 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2023-02-15 22:25:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:25:59,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16 [2023-02-15 22:25:59,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:25:59,231 INFO L225 Difference]: With dead ends: 94 [2023-02-15 22:25:59,232 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 22:25:59,232 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 [2023-02-15 22:25:59,233 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 9 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:25:59,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 211 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:25:59,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 22:25:59,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-02-15 22:25:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 81 states have internal predecessors, (88), 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) [2023-02-15 22:25:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-02-15 22:25:59,252 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 16 [2023-02-15 22:25:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:25:59,253 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-02-15 22:25:59,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-02-15 22:25:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-02-15 22:25:59,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 22:25:59,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:25:59,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:25:59,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 22:25:59,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:25:59,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:25:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash 958467140, now seen corresponding path program 1 times [2023-02-15 22:25:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:25:59,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568902519] [2023-02-15 22:25:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:25:59,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:25:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:59,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:25:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:25:59,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:25:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568902519] [2023-02-15 22:25:59,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568902519] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:25:59,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:25:59,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:25:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077618313] [2023-02-15 22:25:59,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:25:59,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:25:59,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:25:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:25:59,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:25:59,337 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-02-15 22:25:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:25:59,405 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2023-02-15 22:25:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:25:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 17 [2023-02-15 22:25:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:25:59,406 INFO L225 Difference]: With dead ends: 91 [2023-02-15 22:25:59,406 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 22:25:59,406 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 [2023-02-15 22:25:59,407 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:25:59,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 207 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:25:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 22:25:59,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2023-02-15 22:25:59,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:25:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2023-02-15 22:25:59,420 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 17 [2023-02-15 22:25:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:25:59,420 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2023-02-15 22:25:59,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-02-15 22:25:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2023-02-15 22:25:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 22:25:59,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:25:59,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:25:59,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 22:25:59,422 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:25:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:25:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash 239866037, now seen corresponding path program 1 times [2023-02-15 22:25:59,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:25:59,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239650792] [2023-02-15 22:25:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:25:59,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:25:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:59,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:25:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:59,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 22:25:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 22:25:59,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:25:59,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239650792] [2023-02-15 22:25:59,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239650792] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:25:59,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211248241] [2023-02-15 22:25:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:25:59,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:25:59,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:25:59,594 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) [2023-02-15 22:25:59,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 22:25:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:25:59,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 22:25:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:25:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:25:59,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:25:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 22:25:59,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211248241] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:25:59,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:25:59,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-02-15 22:25:59,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949498249] [2023-02-15 22:25:59,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:25:59,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:25:59,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:25:59,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:25:59,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:25:59,844 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 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) [2023-02-15 22:25:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:25:59,931 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2023-02-15 22:25:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:25:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 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 31 [2023-02-15 22:25:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:25:59,932 INFO L225 Difference]: With dead ends: 92 [2023-02-15 22:25:59,932 INFO L226 Difference]: Without dead ends: 92 [2023-02-15 22:25:59,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:25:59,933 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 9 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:25:59,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 210 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:25:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-15 22:25:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-02-15 22:25:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 87 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) [2023-02-15 22:25:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2023-02-15 22:25:59,937 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 31 [2023-02-15 22:25:59,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:25:59,937 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2023-02-15 22:25:59,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 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) [2023-02-15 22:25:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2023-02-15 22:25:59,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 22:25:59,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:25:59,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 22:25:59,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:00,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:00,145 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:00,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1367704317, now seen corresponding path program 1 times [2023-02-15 22:26:00,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:00,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397882144] [2023-02-15 22:26:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:00,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:00,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:00,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:26:00,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:00,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397882144] [2023-02-15 22:26:00,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397882144] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:00,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676896262] [2023-02-15 22:26:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:00,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:00,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:00,497 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) [2023-02-15 22:26:00,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 22:26:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:00,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 22:26:00,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:00,645 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 [2023-02-15 22:26:00,700 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_510 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_510))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-15 22:26:00,774 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:26:00,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:26:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-15 22:26:00,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:00,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676896262] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:00,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:26:00,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2023-02-15 22:26:00,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661793116] [2023-02-15 22:26:00,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:00,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 22:26:00,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:00,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 22:26:00,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-02-15 22:26:00,837 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 22:26:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:01,186 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2023-02-15 22:26:01,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:26:01,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-02-15 22:26:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:01,187 INFO L225 Difference]: With dead ends: 103 [2023-02-15 22:26:01,187 INFO L226 Difference]: Without dead ends: 103 [2023-02-15 22:26:01,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2023-02-15 22:26:01,188 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 142 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:01,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 317 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 405 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2023-02-15 22:26:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-15 22:26:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2023-02-15 22:26:01,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.631578947368421) internal successors, (93), 86 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) [2023-02-15 22:26:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2023-02-15 22:26:01,192 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 32 [2023-02-15 22:26:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:01,192 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2023-02-15 22:26:01,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 22:26:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2023-02-15 22:26:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 22:26:01,193 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:01,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 22:26:01,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:01,398 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 [2023-02-15 22:26:01,399 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:01,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:01,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1367704316, now seen corresponding path program 1 times [2023-02-15 22:26:01,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:01,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433759350] [2023-02-15 22:26:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:01,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:01,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:26:01,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:01,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433759350] [2023-02-15 22:26:01,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433759350] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:01,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119640430] [2023-02-15 22:26:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:01,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:01,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:01,893 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) [2023-02-15 22:26:01,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 22:26:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 22:26:02,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:02,036 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 [2023-02-15 22:26:02,041 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 [2023-02-15 22:26:02,174 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_688 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_688))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-15 22:26:02,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:02,225 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 12 treesize of output 14 [2023-02-15 22:26:02,233 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 22:26:02,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 22:26:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-15 22:26:02,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:04,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119640430] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:04,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:26:04,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2023-02-15 22:26:04,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433320971] [2023-02-15 22:26:04,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:04,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 22:26:04,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:04,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 22:26:04,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=231, Unknown=1, NotChecked=30, Total=306 [2023-02-15 22:26:04,390 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 22:26:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:04,905 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2023-02-15 22:26:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 22:26:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-15 22:26:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:04,906 INFO L225 Difference]: With dead ends: 91 [2023-02-15 22:26:04,906 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 22:26:04,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=79, Invalid=386, Unknown=1, NotChecked=40, Total=506 [2023-02-15 22:26:04,907 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 85 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:04,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 407 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 624 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2023-02-15 22:26:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 22:26:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2023-02-15 22:26:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:26:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2023-02-15 22:26:04,910 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 32 [2023-02-15 22:26:04,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:04,910 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2023-02-15 22:26:04,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 22:26:04,910 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2023-02-15 22:26:04,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 22:26:04,911 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:04,911 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:26:04,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:05,118 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 [2023-02-15 22:26:05,118 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1122646220, now seen corresponding path program 2 times [2023-02-15 22:26:05,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:05,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391430566] [2023-02-15 22:26:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:05,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:05,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:05,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:05,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 22:26:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 22:26:05,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:05,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391430566] [2023-02-15 22:26:05,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391430566] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:05,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398214732] [2023-02-15 22:26:05,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:26:05,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:05,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:05,280 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) [2023-02-15 22:26:05,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 22:26:05,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:26:05,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:26:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 22:26:05,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:26:05,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 22:26:05,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398214732] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:26:05,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:26:05,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2023-02-15 22:26:05,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153756252] [2023-02-15 22:26:05,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:05,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 22:26:05,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:05,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 22:26:05,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:26:05,529 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 22:26:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:05,684 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2023-02-15 22:26:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:26:05,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2023-02-15 22:26:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:05,686 INFO L225 Difference]: With dead ends: 90 [2023-02-15 22:26:05,686 INFO L226 Difference]: Without dead ends: 90 [2023-02-15 22:26:05,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:26:05,687 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 144 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:05,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 355 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:26:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-15 22:26:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-02-15 22:26:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:26:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2023-02-15 22:26:05,689 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 46 [2023-02-15 22:26:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:05,690 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2023-02-15 22:26:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 22:26:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2023-02-15 22:26:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 22:26:05,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:05,691 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:05,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:05,891 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 [2023-02-15 22:26:05,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash 186649324, now seen corresponding path program 1 times [2023-02-15 22:26:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:05,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635166096] [2023-02-15 22:26:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:05,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:06,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:06,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:06,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 22:26:06,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:06,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635166096] [2023-02-15 22:26:06,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635166096] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:06,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603167430] [2023-02-15 22:26:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:06,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:06,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:06,359 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) [2023-02-15 22:26:06,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 22:26:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 22:26:06,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:06,540 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 [2023-02-15 22:26:06,554 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 5 treesize of output 3 [2023-02-15 22:26:06,570 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1169 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_1169))) is different from true [2023-02-15 22:26:06,586 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1169 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_1169))) is different from true [2023-02-15 22:26:06,603 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:26:06,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-02-15 22:26:06,710 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 9 treesize of output 7 [2023-02-15 22:26:06,720 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1170 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1170))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-15 22:26:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:06,782 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 16 treesize of output 18 [2023-02-15 22:26:06,835 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-02-15 22:26:06,857 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:26:06,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 22:26:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 21 not checked. [2023-02-15 22:26:06,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:09,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603167430] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:09,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:26:09,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 18 [2023-02-15 22:26:09,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110794733] [2023-02-15 22:26:09,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:09,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 22:26:09,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 22:26:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=252, Unknown=5, NotChecked=140, Total=462 [2023-02-15 22:26:09,069 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 19 states, 18 states have (on average 3.611111111111111) internal successors, (65), 16 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 22:26:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:09,389 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-02-15 22:26:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:26:09,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.611111111111111) internal successors, (65), 16 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2023-02-15 22:26:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:09,390 INFO L225 Difference]: With dead ends: 97 [2023-02-15 22:26:09,390 INFO L226 Difference]: Without dead ends: 97 [2023-02-15 22:26:09,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=91, Invalid=340, Unknown=5, NotChecked=164, Total=600 [2023-02-15 22:26:09,391 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 242 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:09,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 277 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 325 Invalid, 0 Unknown, 315 Unchecked, 0.2s Time] [2023-02-15 22:26:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-15 22:26:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2023-02-15 22:26:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 80 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:26:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-02-15 22:26:09,394 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 47 [2023-02-15 22:26:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:09,394 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-02-15 22:26:09,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.611111111111111) internal successors, (65), 16 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 22:26:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-02-15 22:26:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 22:26:09,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:09,395 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:09,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:09,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 22:26:09,602 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:09,602 INFO L85 PathProgramCache]: Analyzing trace with hash 186649325, now seen corresponding path program 1 times [2023-02-15 22:26:09,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:09,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738557262] [2023-02-15 22:26:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:09,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:09,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:10,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:10,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 22:26:10,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738557262] [2023-02-15 22:26:10,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738557262] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:10,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597563464] [2023-02-15 22:26:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:10,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:10,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:10,152 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) [2023-02-15 22:26:10,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 22:26:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:10,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-15 22:26:10,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:10,342 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 [2023-02-15 22:26:10,347 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 [2023-02-15 22:26:10,392 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 5 treesize of output 3 [2023-02-15 22:26:10,395 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 5 treesize of output 3 [2023-02-15 22:26:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:10,498 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 12 treesize of output 14 [2023-02-15 22:26:10,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:10,507 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 12 treesize of output 14 [2023-02-15 22:26:10,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:10,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:26:10,668 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 5 treesize of output 3 [2023-02-15 22:26:10,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:10,750 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-15 22:26:10,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 22:26:10,757 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 12 treesize of output 14 [2023-02-15 22:26:10,877 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 5 treesize of output 3 [2023-02-15 22:26:10,901 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1425 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1425))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-15 22:26:10,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:10,941 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 12 treesize of output 14 [2023-02-15 22:26:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 14 not checked. [2023-02-15 22:26:10,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:11,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597563464] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:11,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:26:11,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16] total 23 [2023-02-15 22:26:11,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217254823] [2023-02-15 22:26:11,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:11,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 22:26:11,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:11,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 22:26:11,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=517, Unknown=1, NotChecked=46, Total=650 [2023-02-15 22:26:11,081 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 24 states, 21 states have (on average 3.0) internal successors, (63), 19 states have internal predecessors, (63), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:26:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:11,674 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2023-02-15 22:26:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 22:26:11,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.0) internal successors, (63), 19 states have internal predecessors, (63), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 47 [2023-02-15 22:26:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:11,675 INFO L225 Difference]: With dead ends: 92 [2023-02-15 22:26:11,676 INFO L226 Difference]: Without dead ends: 92 [2023-02-15 22:26:11,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=839, Unknown=1, NotChecked=60, Total=1056 [2023-02-15 22:26:11,677 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 577 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:11,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 206 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 366 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2023-02-15 22:26:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-15 22:26:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2023-02-15 22:26:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 75 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:26:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2023-02-15 22:26:11,680 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 47 [2023-02-15 22:26:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:11,681 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2023-02-15 22:26:11,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.0) internal successors, (63), 19 states have internal predecessors, (63), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:26:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2023-02-15 22:26:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 22:26:11,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:11,682 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:11,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:11,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:11,889 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:11,889 INFO L85 PathProgramCache]: Analyzing trace with hash 353447346, now seen corresponding path program 1 times [2023-02-15 22:26:11,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:11,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153655503] [2023-02-15 22:26:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:11,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:12,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:12,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:12,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 22:26:12,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:12,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153655503] [2023-02-15 22:26:12,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153655503] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:12,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181178993] [2023-02-15 22:26:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:12,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:12,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:12,601 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) [2023-02-15 22:26:12,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 22:26:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:12,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 22:26:12,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:12,845 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 [2023-02-15 22:26:13,015 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 [2023-02-15 22:26:13,131 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1677 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1677)) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0) (= (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|)) |c_#valid|))) is different from true [2023-02-15 22:26:13,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:13,158 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 [2023-02-15 22:26:13,173 INFO L321 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-02-15 22:26:13,173 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 24 [2023-02-15 22:26:13,207 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 [2023-02-15 22:26:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-02-15 22:26:13,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:13,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181178993] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:13,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:26:13,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2023-02-15 22:26:13,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463310791] [2023-02-15 22:26:13,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:13,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 22:26:13,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:13,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 22:26:13,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=572, Unknown=1, NotChecked=48, Total=702 [2023-02-15 22:26:13,308 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 22:26:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:14,006 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2023-02-15 22:26:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 22:26:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2023-02-15 22:26:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:14,008 INFO L225 Difference]: With dead ends: 121 [2023-02-15 22:26:14,008 INFO L226 Difference]: Without dead ends: 121 [2023-02-15 22:26:14,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=1064, Unknown=1, NotChecked=68, Total=1332 [2023-02-15 22:26:14,009 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 461 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:14,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 502 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 677 Invalid, 0 Unknown, 113 Unchecked, 0.5s Time] [2023-02-15 22:26:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-15 22:26:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2023-02-15 22:26:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.396551724137931) internal successors, (81), 74 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:26:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2023-02-15 22:26:14,012 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 51 [2023-02-15 22:26:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:14,012 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2023-02-15 22:26:14,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 22:26:14,012 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2023-02-15 22:26:14,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 22:26:14,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:14,013 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:14,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:14,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:14,222 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash 353447347, now seen corresponding path program 1 times [2023-02-15 22:26:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:14,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962802725] [2023-02-15 22:26:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:14,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:14,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:14,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:26:15,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:15,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962802725] [2023-02-15 22:26:15,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962802725] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:15,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707215985] [2023-02-15 22:26:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:15,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:15,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:15,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:26:15,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 22:26:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:15,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-15 22:26:15,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:15,730 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 [2023-02-15 22:26:15,735 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 [2023-02-15 22:26:16,073 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 19 treesize of output 11 [2023-02-15 22:26:16,079 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 7 treesize of output 3 [2023-02-15 22:26:16,287 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1932 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1932))) (exists ((v_ArrVal_1938 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1938))) (exists ((v_ArrVal_1937 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1937))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-15 22:26:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:16,331 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 14 treesize of output 16 [2023-02-15 22:26:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:16,339 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 16 treesize of output 18 [2023-02-15 22:26:16,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:16,344 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 25 treesize of output 25 [2023-02-15 22:26:16,353 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 22:26:16,353 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 15 [2023-02-15 22:26:16,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:26:16,416 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 [2023-02-15 22:26:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-02-15 22:26:16,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:17,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707215985] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:17,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:26:17,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2023-02-15 22:26:17,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281239327] [2023-02-15 22:26:17,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:17,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 22:26:17,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:17,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 22:26:17,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1091, Unknown=2, NotChecked=66, Total=1260 [2023-02-15 22:26:17,323 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 32 states, 29 states have (on average 2.793103448275862) internal successors, (81), 28 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 22:26:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:19,186 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2023-02-15 22:26:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 22:26:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.793103448275862) internal successors, (81), 28 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2023-02-15 22:26:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:19,188 INFO L225 Difference]: With dead ends: 117 [2023-02-15 22:26:19,188 INFO L226 Difference]: Without dead ends: 117 [2023-02-15 22:26:19,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=268, Invalid=2281, Unknown=5, NotChecked=98, Total=2652 [2023-02-15 22:26:19,189 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 419 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:19,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 988 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1270 Invalid, 3 Unknown, 87 Unchecked, 1.0s Time] [2023-02-15 22:26:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-15 22:26:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2023-02-15 22:26:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 77 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:26:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-02-15 22:26:19,192 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 51 [2023-02-15 22:26:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:19,192 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-02-15 22:26:19,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.793103448275862) internal successors, (81), 28 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 22:26:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-02-15 22:26:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 22:26:19,193 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:19,193 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:19,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:19,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 22:26:19,394 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1709893007, now seen corresponding path program 1 times [2023-02-15 22:26:19,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:19,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891912523] [2023-02-15 22:26:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:19,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:19,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 22:26:19,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:19,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891912523] [2023-02-15 22:26:19,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891912523] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:26:19,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:26:19,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:26:19,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125623903] [2023-02-15 22:26:19,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:26:19,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:26:19,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:19,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:26:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:26:19,554 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-02-15 22:26:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:19,673 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2023-02-15 22:26:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:26:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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 54 [2023-02-15 22:26:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:19,674 INFO L225 Difference]: With dead ends: 93 [2023-02-15 22:26:19,674 INFO L226 Difference]: Without dead ends: 93 [2023-02-15 22:26:19,674 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 [2023-02-15 22:26:19,675 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:19,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 219 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:26:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-15 22:26:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2023-02-15 22:26:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.360655737704918) internal successors, (83), 76 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:26:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2023-02-15 22:26:19,677 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 54 [2023-02-15 22:26:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:19,677 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2023-02-15 22:26:19,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-02-15 22:26:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2023-02-15 22:26:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 22:26:19,678 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:19,678 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:19,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 22:26:19,678 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:19,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:19,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1709893006, now seen corresponding path program 1 times [2023-02-15 22:26:19,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:19,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049668521] [2023-02-15 22:26:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:19,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:19,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:19,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 22:26:19,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:19,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049668521] [2023-02-15 22:26:19,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049668521] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:26:19,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:26:19,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:26:19,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870331914] [2023-02-15 22:26:19,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:26:19,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:26:19,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:26:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:26:19,957 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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) [2023-02-15 22:26:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:20,083 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2023-02-15 22:26:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:26:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 54 [2023-02-15 22:26:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:20,084 INFO L225 Difference]: With dead ends: 80 [2023-02-15 22:26:20,084 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 22:26:20,084 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 [2023-02-15 22:26:20,085 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 45 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:20,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 218 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:26:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 22:26:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-02-15 22:26:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 75 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:26:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-02-15 22:26:20,087 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 54 [2023-02-15 22:26:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:20,087 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-02-15 22:26:20,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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) [2023-02-15 22:26:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-02-15 22:26:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 22:26:20,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:20,088 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:20,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 22:26:20,088 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1969948792, now seen corresponding path program 1 times [2023-02-15 22:26:20,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:20,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986581274] [2023-02-15 22:26:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:20,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:20,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:20,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:20,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 22:26:20,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986581274] [2023-02-15 22:26:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986581274] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:26:20,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:26:20,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 22:26:20,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265914264] [2023-02-15 22:26:20,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:26:20,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 22:26:20,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 22:26:20,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:26:20,379 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:26:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:20,624 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2023-02-15 22:26:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 22:26:20,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 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 54 [2023-02-15 22:26:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:20,626 INFO L225 Difference]: With dead ends: 141 [2023-02-15 22:26:20,626 INFO L226 Difference]: Without dead ends: 141 [2023-02-15 22:26:20,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-02-15 22:26:20,627 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 165 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:20,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 333 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:26:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-15 22:26:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2023-02-15 22:26:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 79 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) [2023-02-15 22:26:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2023-02-15 22:26:20,630 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 54 [2023-02-15 22:26:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:20,631 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2023-02-15 22:26:20,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:26:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2023-02-15 22:26:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 22:26:20,631 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:20,631 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:20,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 22:26:20,632 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1969948791, now seen corresponding path program 1 times [2023-02-15 22:26:20,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:20,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790421583] [2023-02-15 22:26:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:20,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:21,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:21,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:21,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 22:26:21,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:21,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790421583] [2023-02-15 22:26:21,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790421583] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:26:21,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:26:21,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 22:26:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038943646] [2023-02-15 22:26:21,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:26:21,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 22:26:21,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 22:26:21,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:26:21,116 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:26:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:21,392 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2023-02-15 22:26:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 22:26:21,392 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (2), 1 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 54 [2023-02-15 22:26:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:21,393 INFO L225 Difference]: With dead ends: 131 [2023-02-15 22:26:21,393 INFO L226 Difference]: Without dead ends: 131 [2023-02-15 22:26:21,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:26:21,394 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 151 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:21,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 347 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:26:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-15 22:26:21,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2023-02-15 22:26:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 81 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:26:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2023-02-15 22:26:21,396 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 54 [2023-02-15 22:26:21,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:21,396 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2023-02-15 22:26:21,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:26:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2023-02-15 22:26:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 22:26:21,397 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:21,397 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:21,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 22:26:21,397 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:21,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1467023000, now seen corresponding path program 1 times [2023-02-15 22:26:21,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:21,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918779109] [2023-02-15 22:26:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:21,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:22,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:22,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:22,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:26:23,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:23,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918779109] [2023-02-15 22:26:23,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918779109] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:23,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74125450] [2023-02-15 22:26:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:23,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:23,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:23,129 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:26:23,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 22:26:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:23,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-15 22:26:23,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:23,403 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 [2023-02-15 22:26:23,685 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:26:23,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:26:23,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:26:23,881 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:26:23,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-02-15 22:26:24,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:26:24,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 18 [2023-02-15 22:26:24,094 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 7 treesize of output 3 [2023-02-15 22:26:24,275 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_2839 (Array Int Int)) (v_ArrVal_2838 (Array Int Int))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2838)) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0) (= (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|)) |c_#valid|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2839)))) is different from true [2023-02-15 22:26:24,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:24,315 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 14 treesize of output 16 [2023-02-15 22:26:24,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:24,327 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:26:24,328 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 2 case distinctions, treesize of input 45 treesize of output 43 [2023-02-15 22:26:24,358 INFO L321 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2023-02-15 22:26:24,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 52 [2023-02-15 22:26:24,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:26:24,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:26:24,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 21 [2023-02-15 22:26:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-15 22:26:24,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:24,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74125450] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:24,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:26:24,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 47 [2023-02-15 22:26:24,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609683901] [2023-02-15 22:26:24,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:24,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 22:26:24,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 22:26:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2352, Unknown=1, NotChecked=98, Total=2652 [2023-02-15 22:26:24,934 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 48 states, 45 states have (on average 2.0) internal successors, (90), 41 states have internal predecessors, (90), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:26:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:26,881 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2023-02-15 22:26:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 22:26:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.0) internal successors, (90), 41 states have internal predecessors, (90), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2023-02-15 22:26:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:26,882 INFO L225 Difference]: With dead ends: 133 [2023-02-15 22:26:26,882 INFO L226 Difference]: Without dead ends: 133 [2023-02-15 22:26:26,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=487, Invalid=3938, Unknown=1, NotChecked=130, Total=4556 [2023-02-15 22:26:26,883 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 594 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:26,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1076 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1541 Invalid, 0 Unknown, 125 Unchecked, 1.1s Time] [2023-02-15 22:26:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-15 22:26:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 88. [2023-02-15 22:26:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 83 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) [2023-02-15 22:26:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2023-02-15 22:26:26,887 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 55 [2023-02-15 22:26:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:26,887 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2023-02-15 22:26:26,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.0) internal successors, (90), 41 states have internal predecessors, (90), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:26:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2023-02-15 22:26:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 22:26:26,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:26,888 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:26,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:27,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:27,089 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:27,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1467022999, now seen corresponding path program 1 times [2023-02-15 22:26:27,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569928745] [2023-02-15 22:26:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:27,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:28,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:28,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:28,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:26:29,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:29,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569928745] [2023-02-15 22:26:29,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569928745] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:29,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331184534] [2023-02-15 22:26:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:29,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:29,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:29,362 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:26:29,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 22:26:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 121 conjunts are in the unsatisfiable core [2023-02-15 22:26:29,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:29,661 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 [2023-02-15 22:26:30,066 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:26:30,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:26:30,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:26:30,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:26:30,318 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:26:30,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 62 [2023-02-15 22:26:30,326 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 50 treesize of output 48 [2023-02-15 22:26:30,641 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:26:30,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 43 [2023-02-15 22:26:30,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:26:30,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2023-02-15 22:26:30,877 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_3110 (Array Int Int)) (v_ArrVal_3111 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_3110)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_3111)) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-02-15 22:26:30,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:30,933 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:26:30,933 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 2 case distinctions, treesize of input 90 treesize of output 76 [2023-02-15 22:26:30,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:30,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:30,948 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-15 22:26:30,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2023-02-15 22:26:30,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:30,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 27 [2023-02-15 22:26:30,978 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-15 22:26:30,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-02-15 22:26:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:31,327 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:26:31,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:26:31,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 52 [2023-02-15 22:26:31,342 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-02-15 22:26:31,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-02-15 22:26:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-15 22:26:31,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:31,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331184534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:31,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:26:31,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 49 [2023-02-15 22:26:31,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448374135] [2023-02-15 22:26:31,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:31,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 22:26:31,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:31,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 22:26:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2783, Unknown=1, NotChecked=106, Total=3080 [2023-02-15 22:26:31,789 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 50 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 43 states have internal predecessors, (92), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:26:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:35,868 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2023-02-15 22:26:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 22:26:35,869 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 43 states have internal predecessors, (92), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2023-02-15 22:26:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:35,869 INFO L225 Difference]: With dead ends: 179 [2023-02-15 22:26:35,870 INFO L226 Difference]: Without dead ends: 179 [2023-02-15 22:26:35,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=570, Invalid=5285, Unknown=1, NotChecked=150, Total=6006 [2023-02-15 22:26:35,871 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 691 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:35,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1355 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2356 Invalid, 0 Unknown, 161 Unchecked, 1.5s Time] [2023-02-15 22:26:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-15 22:26:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 90. [2023-02-15 22:26:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 85 states have internal predecessors, (95), 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) [2023-02-15 22:26:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2023-02-15 22:26:35,875 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 55 [2023-02-15 22:26:35,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:35,876 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2023-02-15 22:26:35,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 43 states have internal predecessors, (92), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:26:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2023-02-15 22:26:35,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 22:26:35,876 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:35,877 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:35,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:36,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:36,083 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:36,084 INFO L85 PathProgramCache]: Analyzing trace with hash -938871693, now seen corresponding path program 1 times [2023-02-15 22:26:36,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:36,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195168147] [2023-02-15 22:26:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:36,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:36,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:36,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:36,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 22:26:36,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:36,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195168147] [2023-02-15 22:26:36,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195168147] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:26:36,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:26:36,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 22:26:36,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890238455] [2023-02-15 22:26:36,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:26:36,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 22:26:36,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:36,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 22:26:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:26:36,338 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:26:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:36,506 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2023-02-15 22:26:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 22:26:36,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (2), 1 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 55 [2023-02-15 22:26:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:36,507 INFO L225 Difference]: With dead ends: 118 [2023-02-15 22:26:36,507 INFO L226 Difference]: Without dead ends: 118 [2023-02-15 22:26:36,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:26:36,508 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 154 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:36,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 515 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:26:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-15 22:26:36,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2023-02-15 22:26:36,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.3055555555555556) 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) [2023-02-15 22:26:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2023-02-15 22:26:36,511 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 55 [2023-02-15 22:26:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:36,511 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2023-02-15 22:26:36,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:26:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2023-02-15 22:26:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 22:26:36,512 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:36,512 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 22:26:36,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 22:26:36,513 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:36,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:36,513 INFO L85 PathProgramCache]: Analyzing trace with hash 959790642, now seen corresponding path program 1 times [2023-02-15 22:26:36,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:36,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27891853] [2023-02-15 22:26:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:36,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:36,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:36,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:26:36,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:36,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27891853] [2023-02-15 22:26:36,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27891853] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:36,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72068626] [2023-02-15 22:26:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:36,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:36,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:36,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:26:37,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 22:26:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:37,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 22:26:37,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:37,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:26:37,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:26:37,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:37,600 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 18 treesize of output 20 [2023-02-15 22:26:37,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:26:37,656 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 28 treesize of output 16 [2023-02-15 22:26:37,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:26:37,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:26:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 22:26:37,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:26:37,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72068626] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:26:37,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:26:37,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2023-02-15 22:26:37,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182887270] [2023-02-15 22:26:37,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:26:37,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 22:26:37,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:37,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 22:26:37,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2023-02-15 22:26:37,755 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:26:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:38,191 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2023-02-15 22:26:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 22:26:38,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (2), 1 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 56 [2023-02-15 22:26:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:38,193 INFO L225 Difference]: With dead ends: 116 [2023-02-15 22:26:38,193 INFO L226 Difference]: Without dead ends: 116 [2023-02-15 22:26:38,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 22:26:38,194 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 201 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:38,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 566 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:26:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-15 22:26:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 90. [2023-02-15 22:26:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 85 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) [2023-02-15 22:26:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2023-02-15 22:26:38,197 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 56 [2023-02-15 22:26:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:38,198 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2023-02-15 22:26:38,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:26:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2023-02-15 22:26:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 22:26:38,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:38,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:26:38,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:38,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-15 22:26:38,406 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:38,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:38,406 INFO L85 PathProgramCache]: Analyzing trace with hash -588248546, now seen corresponding path program 2 times [2023-02-15 22:26:38,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:38,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254096450] [2023-02-15 22:26:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:38,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:40,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:40,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:40,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:26:41,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254096450] [2023-02-15 22:26:41,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254096450] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841680055] [2023-02-15 22:26:41,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:26:41,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:41,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:41,629 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:26:41,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 22:26:41,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:26:41,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:26:41,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 148 conjunts are in the unsatisfiable core [2023-02-15 22:26:41,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:41,998 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 [2023-02-15 22:26:42,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:26:42,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:26:42,700 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:26:42,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-02-15 22:26:42,723 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:26:42,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-02-15 22:26:42,738 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 22:26:42,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 22:26:42,885 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 14 treesize of output 16 [2023-02-15 22:26:42,896 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 14 treesize of output 16 [2023-02-15 22:26:42,985 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 21 treesize of output 20 [2023-02-15 22:26:42,997 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 21 treesize of output 20 [2023-02-15 22:26:43,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:43,112 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:26:43,115 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 22:26:43,116 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 1 case distinctions, treesize of input 94 treesize of output 57 [2023-02-15 22:26:43,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-02-15 22:26:43,464 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 22:26:43,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 38 [2023-02-15 22:26:43,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:26:43,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2023-02-15 22:26:43,655 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3816 (Array Int Int)) (|node_create_~temp~0#1.base| Int) (v_ArrVal_3815 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_3816)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_3815)) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0))) is different from true [2023-02-15 22:26:43,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:43,707 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-15 22:26:43,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 76 [2023-02-15 22:26:43,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:43,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:43,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:43,723 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-02-15 22:26:43,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2023-02-15 22:26:43,741 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-15 22:26:43,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-02-15 22:26:44,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:44,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:26:44,421 INFO L321 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2023-02-15 22:26:44,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 74 [2023-02-15 22:26:44,439 INFO L321 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2023-02-15 22:26:44,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 29 [2023-02-15 22:26:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-02-15 22:26:44,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:44,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841680055] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:44,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:26:44,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 56 [2023-02-15 22:26:44,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91362460] [2023-02-15 22:26:44,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:44,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 22:26:44,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:44,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 22:26:44,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3483, Unknown=3, NotChecked=118, Total=3782 [2023-02-15 22:26:44,992 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 56 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 50 states have internal predecessors, (98), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:26:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:47,921 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2023-02-15 22:26:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 22:26:47,922 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 50 states have internal predecessors, (98), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2023-02-15 22:26:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:47,922 INFO L225 Difference]: With dead ends: 116 [2023-02-15 22:26:47,922 INFO L226 Difference]: Without dead ends: 116 [2023-02-15 22:26:47,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 48 SyntacticMatches, 9 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=367, Invalid=6276, Unknown=3, NotChecked=160, Total=6806 [2023-02-15 22:26:47,924 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 45 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 2223 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:47,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1600 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2223 Invalid, 1 Unknown, 100 Unchecked, 1.6s Time] [2023-02-15 22:26:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-15 22:26:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2023-02-15 22:26:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 105 states have internal predecessors, (116), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:26:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2023-02-15 22:26:47,927 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 59 [2023-02-15 22:26:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:47,928 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2023-02-15 22:26:47,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 50 states have internal predecessors, (98), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:26:47,928 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2023-02-15 22:26:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 22:26:47,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:47,929 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1] [2023-02-15 22:26:47,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 22:26:48,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-15 22:26:48,136 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1935094492, now seen corresponding path program 1 times [2023-02-15 22:26:48,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:48,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679665596] [2023-02-15 22:26:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:48,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:48,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:48,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:48,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:26:48,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:48,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679665596] [2023-02-15 22:26:48,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679665596] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:26:48,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:26:48,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-02-15 22:26:48,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209188861] [2023-02-15 22:26:48,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:26:48,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 22:26:48,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:48,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 22:26:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2023-02-15 22:26:48,887 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 22:26:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:49,768 INFO L93 Difference]: Finished difference Result 176 states and 195 transitions. [2023-02-15 22:26:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 22:26:49,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2023-02-15 22:26:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:49,769 INFO L225 Difference]: With dead ends: 176 [2023-02-15 22:26:49,769 INFO L226 Difference]: Without dead ends: 176 [2023-02-15 22:26:49,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 22:26:49,770 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 639 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:49,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 440 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:26:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-02-15 22:26:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 119. [2023-02-15 22:26:49,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 112 states have internal predecessors, (125), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:26:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2023-02-15 22:26:49,775 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 59 [2023-02-15 22:26:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:49,776 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2023-02-15 22:26:49,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 22:26:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2023-02-15 22:26:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 22:26:49,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:49,777 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1] [2023-02-15 22:26:49,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-15 22:26:49,777 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:26:49,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:26:49,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1935094491, now seen corresponding path program 1 times [2023-02-15 22:26:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:26:49,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690552882] [2023-02-15 22:26:49,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:49,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:26:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:50,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:26:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:50,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:26:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:50,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:26:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:26:51,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:26:51,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690552882] [2023-02-15 22:26:51,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690552882] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:51,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313460027] [2023-02-15 22:26:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:26:51,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:26:51,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:26:51,342 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:26:51,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 22:26:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:26:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 113 conjunts are in the unsatisfiable core [2023-02-15 22:26:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:26:51,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:26:51,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:26:52,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:26:52,254 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:26:52,255 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2023-02-15 22:26:52,265 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 23 treesize of output 11 [2023-02-15 22:26:52,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:26:52,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 30 [2023-02-15 22:26:52,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-02-15 22:26:52,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-02-15 22:26:52,653 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 7 treesize of output 3 [2023-02-15 22:26:52,909 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-02-15 22:26:52,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-02-15 22:26:52,912 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 5 treesize of output 3 [2023-02-15 22:26:52,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:52,934 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-15 22:26:52,934 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 2 case distinctions, treesize of input 67 treesize of output 54 [2023-02-15 22:26:52,952 INFO L321 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-02-15 22:26:52,952 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 1 case distinctions, treesize of input 18 treesize of output 21 [2023-02-15 22:26:52,978 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 22:26:52,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-15 22:26:53,643 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:26:53,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 74 [2023-02-15 22:26:53,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:53,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2023-02-15 22:26:53,663 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 11 treesize of output 3 [2023-02-15 22:26:53,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:53,737 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 41 treesize of output 37 [2023-02-15 22:26:53,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:26:53,750 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 14 treesize of output 16 [2023-02-15 22:26:53,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:26:53,822 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 34 treesize of output 18 [2023-02-15 22:26:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:26:53,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:26:54,072 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4274 (Array Int Int)) (v_ArrVal_4275 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_4275) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_4274) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_4275 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_4275) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2023-02-15 22:26:55,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313460027] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:26:55,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:26:55,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 49 [2023-02-15 22:26:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609612382] [2023-02-15 22:26:55,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:26:55,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 22:26:55,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:26:55,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 22:26:55,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3330, Unknown=9, NotChecked=116, Total=3660 [2023-02-15 22:26:55,641 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand has 50 states, 47 states have (on average 2.127659574468085) internal successors, (100), 43 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 22:26:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:26:59,785 INFO L93 Difference]: Finished difference Result 161 states and 179 transitions. [2023-02-15 22:26:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 22:26:59,786 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 2.127659574468085) internal successors, (100), 43 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 59 [2023-02-15 22:26:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:26:59,786 INFO L225 Difference]: With dead ends: 161 [2023-02-15 22:26:59,787 INFO L226 Difference]: Without dead ends: 161 [2023-02-15 22:26:59,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=604, Invalid=6363, Unknown=9, NotChecked=164, Total=7140 [2023-02-15 22:26:59,789 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 655 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:26:59,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1362 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 22:26:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-15 22:26:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 120. [2023-02-15 22:26:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 100 states have (on average 1.25) internal successors, (125), 113 states have internal predecessors, (125), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:26:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2023-02-15 22:26:59,796 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 59 [2023-02-15 22:26:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:26:59,796 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2023-02-15 22:26:59,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 2.127659574468085) internal successors, (100), 43 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 22:26:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2023-02-15 22:26:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 22:26:59,797 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:26:59,797 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:26:59,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 22:27:00,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-15 22:27:00,004 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:27:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:27:00,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1526484642, now seen corresponding path program 1 times [2023-02-15 22:27:00,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:27:00,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879803789] [2023-02-15 22:27:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:00,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:27:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:00,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:27:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:00,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:27:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:00,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:27:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 22:27:00,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:27:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879803789] [2023-02-15 22:27:00,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879803789] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405681267] [2023-02-15 22:27:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:00,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:27:00,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:27:00,489 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:27:00,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 22:27:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:00,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 22:27:00,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:27:01,059 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 [2023-02-15 22:27:01,123 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_4547 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_4547)))) is different from true [2023-02-15 22:27:01,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:01,138 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 24 treesize of output 24 [2023-02-15 22:27:01,169 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 13 [2023-02-15 22:27:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 3 not checked. [2023-02-15 22:27:01,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:27:01,264 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4552 (Array Int Int)) (|v_node_create_~temp~0#1.base_66| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_66| v_ArrVal_4552) |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (or (not (< |v_node_create_~temp~0#1.base_66| |c_#StackHeapBarrier|)) (<= 1 .cse0) (<= (+ .cse0 1) 0)))) is different from false [2023-02-15 22:27:01,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405681267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:01,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:27:01,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2023-02-15 22:27:01,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624655259] [2023-02-15 22:27:01,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:27:01,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 22:27:01,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:27:01,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 22:27:01,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=571, Unknown=2, NotChecked=98, Total=756 [2023-02-15 22:27:01,267 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand has 26 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 22:27:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:27:01,760 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2023-02-15 22:27:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 22:27:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2023-02-15 22:27:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:27:01,761 INFO L225 Difference]: With dead ends: 113 [2023-02-15 22:27:01,761 INFO L226 Difference]: Without dead ends: 113 [2023-02-15 22:27:01,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=956, Unknown=2, NotChecked=130, Total=1260 [2023-02-15 22:27:01,762 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 344 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 22:27:01,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 580 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 501 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2023-02-15 22:27:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-15 22:27:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-02-15 22:27:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 106 states have internal predecessors, (116), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:27:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2023-02-15 22:27:01,767 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 59 [2023-02-15 22:27:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:27:01,768 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2023-02-15 22:27:01,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 22:27:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2023-02-15 22:27:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-15 22:27:01,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:27:01,769 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2023-02-15 22:27:01,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 22:27:01,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:27:01,973 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:27:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:27:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash 95034574, now seen corresponding path program 1 times [2023-02-15 22:27:01,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:27:01,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808734778] [2023-02-15 22:27:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:27:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:03,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:27:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:03,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:27:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:03,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:27:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:27:04,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:27:04,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808734778] [2023-02-15 22:27:04,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808734778] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:04,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917643928] [2023-02-15 22:27:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:04,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:27:04,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:27:04,582 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:27:04,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 22:27:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:04,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 127 conjunts are in the unsatisfiable core [2023-02-15 22:27:04,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:27:04,935 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 [2023-02-15 22:27:05,308 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:27:05,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:27:05,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:27:05,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:05,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 22:27:05,592 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 14 treesize of output 16 [2023-02-15 22:27:06,016 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 44 treesize of output 24 [2023-02-15 22:27:06,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-02-15 22:27:06,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:27:06,029 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 7 treesize of output 3 [2023-02-15 22:27:06,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:06,339 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 54 treesize of output 41 [2023-02-15 22:27:06,352 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-02-15 22:27:06,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 22:27:06,358 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 20 treesize of output 15 [2023-02-15 22:27:06,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:06,370 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 16 treesize of output 11 [2023-02-15 22:27:06,956 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:27:06,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 85 [2023-02-15 22:27:06,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:06,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2023-02-15 22:27:06,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:06,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-02-15 22:27:06,980 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 3 [2023-02-15 22:27:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:07,056 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 43 treesize of output 39 [2023-02-15 22:27:07,061 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 18 treesize of output 20 [2023-02-15 22:27:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:07,066 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 14 treesize of output 16 [2023-02-15 22:27:07,145 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 36 treesize of output 20 [2023-02-15 22:27:07,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:27:07,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2023-02-15 22:27:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:27:07,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:27:07,332 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4842 (Array Int Int)) (v_ArrVal_4843 (Array Int Int)) (v_ArrVal_4844 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_4844) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_4842) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_4843) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2023-02-15 22:27:14,417 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4837 Int) (|v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| Int) (v_ArrVal_4841 (Array Int Int)) (v_ArrVal_4842 (Array Int Int)) (v_ArrVal_4840 Int) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_24| Int) (v_ArrVal_4843 (Array Int Int)) (v_ArrVal_4844 (Array Int Int)) (v_ArrVal_4857 (Array Int Int)) (v_ArrVal_4858 (Array Int Int)) (v_ArrVal_4859 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_4858))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse2 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_24| 4)) (.cse4 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_4857))) (or (not (= 0 (select (select .cse0 .cse1) .cse2))) (= (select (select (store (let ((.cse3 (store |c_#memory_int| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_4859))) (store .cse3 .cse1 (store (select .cse3 .cse1) .cse2 v_ArrVal_4837))) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_4844) (select (select (store (store .cse0 .cse1 v_ArrVal_4841) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_4842) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store .cse4 .cse1 (store (select .cse4 .cse1) .cse2 v_ArrVal_4840)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_4843) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|) (not (< |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| |c_#StackHeapBarrier|)) (< |v_ULTIMATE.start_dll_append_~last~0#1.offset_24| (select (select .cse4 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35|))))))) is different from false [2023-02-15 22:27:14,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917643928] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:14,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:27:14,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 58 [2023-02-15 22:27:14,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431092246] [2023-02-15 22:27:14,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:27:14,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 22:27:14,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:27:14,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 22:27:14,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=3767, Unknown=32, NotChecked=250, Total=4290 [2023-02-15 22:27:14,421 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand has 58 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 49 states have internal predecessors, (100), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:27:18,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:27:18,435 INFO L93 Difference]: Finished difference Result 163 states and 180 transitions. [2023-02-15 22:27:18,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 22:27:18,437 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 49 states have internal predecessors, (100), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 61 [2023-02-15 22:27:18,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:27:18,437 INFO L225 Difference]: With dead ends: 163 [2023-02-15 22:27:18,437 INFO L226 Difference]: Without dead ends: 163 [2023-02-15 22:27:18,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=723, Invalid=6735, Unknown=32, NotChecked=342, Total=7832 [2023-02-15 22:27:18,439 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 573 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:27:18,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 1150 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 22:27:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-02-15 22:27:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2023-02-15 22:27:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.2365591397849462) internal successors, (115), 106 states have internal predecessors, (115), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:27:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2023-02-15 22:27:18,443 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 61 [2023-02-15 22:27:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:27:18,444 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2023-02-15 22:27:18,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 49 states have internal predecessors, (100), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:27:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2023-02-15 22:27:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 22:27:18,444 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:27:18,445 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:27:18,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 22:27:18,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 22:27:18,649 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:27:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:27:18,649 INFO L85 PathProgramCache]: Analyzing trace with hash 592087770, now seen corresponding path program 1 times [2023-02-15 22:27:18,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:27:18,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176131720] [2023-02-15 22:27:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:18,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:27:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:19,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:27:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:19,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:27:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:19,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:27:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:27:19,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:27:19,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176131720] [2023-02-15 22:27:19,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176131720] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:19,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135143254] [2023-02-15 22:27:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:19,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:27:19,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:27:19,605 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:27:19,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 22:27:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-15 22:27:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:27:19,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:27:20,265 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 18 treesize of output 10 [2023-02-15 22:27:20,588 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 22:27:20,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 22:27:20,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:20,594 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 32 treesize of output 30 [2023-02-15 22:27:21,117 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2023-02-15 22:27:21,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 71 treesize of output 63 [2023-02-15 22:27:21,146 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:27:21,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 51 [2023-02-15 22:27:21,189 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 13 [2023-02-15 22:27:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:27:21,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:27:25,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135143254] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:25,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:27:25,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 48 [2023-02-15 22:27:25,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238652831] [2023-02-15 22:27:25,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:27:25,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 22:27:25,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:27:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 22:27:25,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2995, Unknown=48, NotChecked=0, Total=3306 [2023-02-15 22:27:25,996 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 49 states, 46 states have (on average 2.282608695652174) internal successors, (105), 43 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 22:27:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:27:28,350 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2023-02-15 22:27:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 22:27:28,351 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 2.282608695652174) internal successors, (105), 43 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2023-02-15 22:27:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:27:28,352 INFO L225 Difference]: With dead ends: 176 [2023-02-15 22:27:28,352 INFO L226 Difference]: Without dead ends: 176 [2023-02-15 22:27:28,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=959, Invalid=5797, Unknown=50, NotChecked=0, Total=6806 [2023-02-15 22:27:28,352 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1272 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 22:27:28,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 751 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1423 Invalid, 2 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 22:27:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-02-15 22:27:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 115. [2023-02-15 22:27:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 108 states have internal predecessors, (118), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:27:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2023-02-15 22:27:28,356 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 63 [2023-02-15 22:27:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:27:28,356 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2023-02-15 22:27:28,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 2.282608695652174) internal successors, (105), 43 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 22:27:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2023-02-15 22:27:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 22:27:28,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:27:28,357 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:27:28,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 22:27:28,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-15 22:27:28,565 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:27:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:27:28,566 INFO L85 PathProgramCache]: Analyzing trace with hash 592087771, now seen corresponding path program 1 times [2023-02-15 22:27:28,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:27:28,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905236468] [2023-02-15 22:27:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:28,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:27:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:29,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:27:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:29,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:27:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:29,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:27:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:27:30,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:27:30,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905236468] [2023-02-15 22:27:30,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905236468] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:30,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652813324] [2023-02-15 22:27:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:30,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:27:30,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:27:30,025 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:27:30,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 22:27:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-15 22:27:30,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:27:30,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:27:30,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:27:30,758 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 15 [2023-02-15 22:27:30,761 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 7 treesize of output 3 [2023-02-15 22:27:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:31,136 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 14 treesize of output 16 [2023-02-15 22:27:31,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:31,142 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 31 [2023-02-15 22:27:31,153 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-15 22:27:31,154 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 1 case distinctions, treesize of input 16 treesize of output 26 [2023-02-15 22:27:31,169 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 22:27:31,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-15 22:27:31,482 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2023-02-15 22:27:31,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 48 treesize of output 44 [2023-02-15 22:27:31,499 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-02-15 22:27:31,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 22:27:31,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:31,511 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 32 treesize of output 30 [2023-02-15 22:27:31,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:31,517 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 14 treesize of output 16 [2023-02-15 22:27:31,590 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 33 treesize of output 17 [2023-02-15 22:27:31,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:27:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 22:27:31,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:27:31,837 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_5426 (Array Int Int)) (v_ArrVal_5425 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5425) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5426) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_5425 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5425) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2023-02-15 22:27:32,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652813324] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:32,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:27:32,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 44 [2023-02-15 22:27:32,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341106822] [2023-02-15 22:27:32,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:27:32,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 22:27:32,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:27:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 22:27:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2561, Unknown=3, NotChecked=102, Total=2862 [2023-02-15 22:27:32,874 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 45 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 39 states have internal predecessors, (98), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 22:27:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:27:35,964 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2023-02-15 22:27:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 22:27:35,966 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 39 states have internal predecessors, (98), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 63 [2023-02-15 22:27:35,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:27:35,967 INFO L225 Difference]: With dead ends: 170 [2023-02-15 22:27:35,967 INFO L226 Difference]: Without dead ends: 170 [2023-02-15 22:27:35,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=727, Invalid=5434, Unknown=5, NotChecked=154, Total=6320 [2023-02-15 22:27:35,968 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1491 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 22:27:35,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 601 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1385 Invalid, 2 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 22:27:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-15 22:27:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2023-02-15 22:27:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 109 states have internal predecessors, (119), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:27:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2023-02-15 22:27:35,972 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 63 [2023-02-15 22:27:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:27:35,972 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2023-02-15 22:27:35,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 39 states have internal predecessors, (98), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 22:27:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2023-02-15 22:27:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 22:27:35,973 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:27:35,973 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:27:35,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 22:27:36,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-15 22:27:36,183 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:27:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:27:36,183 INFO L85 PathProgramCache]: Analyzing trace with hash 792304262, now seen corresponding path program 1 times [2023-02-15 22:27:36,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:27:36,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624918138] [2023-02-15 22:27:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:36,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:27:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:37,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:27:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:37,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:27:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:37,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:27:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:27:37,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:27:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624918138] [2023-02-15 22:27:37,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624918138] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419332075] [2023-02-15 22:27:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:37,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:27:37,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:27:37,613 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:27:37,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 22:27:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:37,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-15 22:27:37,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:27:38,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:27:38,403 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 13 [2023-02-15 22:27:38,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-02-15 22:27:38,409 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 7 treesize of output 3 [2023-02-15 22:27:38,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:38,660 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 14 treesize of output 16 [2023-02-15 22:27:38,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:38,668 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 31 [2023-02-15 22:27:38,682 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 22:27:38,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 22:27:39,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:39,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:27:39,122 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 1 case distinctions, treesize of input 102 treesize of output 62 [2023-02-15 22:27:39,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:39,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2023-02-15 22:27:39,206 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-02-15 22:27:39,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 76 [2023-02-15 22:27:39,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:39,214 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 22 treesize of output 24 [2023-02-15 22:27:39,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:27:39,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:27:39,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 35 [2023-02-15 22:27:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:27:39,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:27:40,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419332075] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:40,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:27:40,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 51 [2023-02-15 22:27:40,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428586736] [2023-02-15 22:27:40,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:27:40,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 22:27:40,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:27:40,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 22:27:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3935, Unknown=16, NotChecked=0, Total=4160 [2023-02-15 22:27:40,851 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand has 51 states, 49 states have (on average 2.306122448979592) internal successors, (113), 45 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 22:27:44,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:27:44,030 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2023-02-15 22:27:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 22:27:44,030 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.306122448979592) internal successors, (113), 45 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 64 [2023-02-15 22:27:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:27:44,031 INFO L225 Difference]: With dead ends: 120 [2023-02-15 22:27:44,031 INFO L226 Difference]: Without dead ends: 120 [2023-02-15 22:27:44,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=530, Invalid=6424, Unknown=18, NotChecked=0, Total=6972 [2023-02-15 22:27:44,032 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 480 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:27:44,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 926 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1546 Invalid, 2 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 22:27:44,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-15 22:27:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2023-02-15 22:27:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 101 states have internal predecessors, (109), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:27:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2023-02-15 22:27:44,035 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 64 [2023-02-15 22:27:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:27:44,036 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2023-02-15 22:27:44,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.306122448979592) internal successors, (113), 45 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 22:27:44,036 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2023-02-15 22:27:44,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 22:27:44,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:27:44,037 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:27:44,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 22:27:44,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:27:44,241 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:27:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:27:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2060666116, now seen corresponding path program 1 times [2023-02-15 22:27:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:27:44,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505166974] [2023-02-15 22:27:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:44,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:27:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:45,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:27:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:45,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:27:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:46,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:27:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:27:46,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:27:46,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505166974] [2023-02-15 22:27:46,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505166974] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:46,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471927812] [2023-02-15 22:27:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:46,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:27:46,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:27:46,635 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:27:46,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 22:27:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:27:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 141 conjunts are in the unsatisfiable core [2023-02-15 22:27:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:27:47,029 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 [2023-02-15 22:27:47,321 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 5 treesize of output 3 [2023-02-15 22:27:47,492 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:27:47,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:27:47,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:27:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:47,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 22:27:47,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:27:47,832 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:27:47,832 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 52 [2023-02-15 22:27:47,838 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 20 treesize of output 22 [2023-02-15 22:27:48,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:27:48,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 32 [2023-02-15 22:27:48,183 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 7 treesize of output 3 [2023-02-15 22:27:48,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:27:48,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:48,518 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-15 22:27:48,518 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 2 case distinctions, treesize of input 79 treesize of output 60 [2023-02-15 22:27:48,531 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-15 22:27:48,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-02-15 22:27:48,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-02-15 22:27:48,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:48,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-02-15 22:27:49,474 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-15 22:27:49,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 173 treesize of output 124 [2023-02-15 22:27:49,488 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-02-15 22:27:49,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 49 [2023-02-15 22:27:49,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:49,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2023-02-15 22:27:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:49,600 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:27:49,600 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 2 case distinctions, treesize of input 75 treesize of output 63 [2023-02-15 22:27:49,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 22:27:49,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:27:49,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 22:27:49,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:27:49,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 27 [2023-02-15 22:27:49,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:27:49,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2023-02-15 22:27:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:27:49,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:27:49,928 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6025 (Array Int Int)) (v_ArrVal_6024 (Array Int Int)) (v_ArrVal_6026 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6025) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6026) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6024) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2023-02-15 22:27:51,121 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6023 (Array Int Int)) (v_ArrVal_6025 (Array Int Int)) (v_ArrVal_6024 (Array Int Int)) (v_ArrVal_6026 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_31| Int) (|v_ULTIMATE.start_dll_append_#t~ret7#1.base_47| Int) (v_ArrVal_6039 (Array Int Int)) (v_ArrVal_6041 (Array Int Int)) (v_ArrVal_6040 (Array Int Int)) (v_ArrVal_6021 (Array Int Int)) (v_ArrVal_6022 Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_47| v_ArrVal_6041)) (.cse3 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_47| v_ArrVal_6039))) (let ((.cse1 (select (select .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (+ (select (select .cse3 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (.cse2 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_31| 4))) (or (not (= (select (select .cse0 .cse1) .cse2) 0)) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_47|))) (not (< |v_ULTIMATE.start_dll_append_#t~ret7#1.base_47| |c_#StackHeapBarrier|)) (= (select (select (store (store (store |c_#memory_int| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_47| v_ArrVal_6040) .cse1 v_ArrVal_6021) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_47| v_ArrVal_6025) (select (select (store (store .cse0 .cse1 v_ArrVal_6023) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_47| v_ArrVal_6026) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store .cse3 .cse1 (store (select .cse3 .cse1) .cse2 v_ArrVal_6022)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_47| v_ArrVal_6024) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|))))) is different from false [2023-02-15 22:27:51,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471927812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:27:51,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:27:51,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 68 [2023-02-15 22:27:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140560944] [2023-02-15 22:27:51,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:27:51,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-15 22:27:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:27:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-15 22:27:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=5378, Unknown=53, NotChecked=298, Total=6006 [2023-02-15 22:27:51,125 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 68 states, 66 states have (on average 1.696969696969697) internal successors, (112), 59 states have internal predecessors, (112), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:27:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:27:58,711 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2023-02-15 22:27:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 22:27:58,711 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 66 states have (on average 1.696969696969697) internal successors, (112), 59 states have internal predecessors, (112), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 65 [2023-02-15 22:27:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:27:58,712 INFO L225 Difference]: With dead ends: 167 [2023-02-15 22:27:58,712 INFO L226 Difference]: Without dead ends: 167 [2023-02-15 22:27:58,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2625 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=931, Invalid=9938, Unknown=59, NotChecked=414, Total=11342 [2023-02-15 22:27:58,714 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 779 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 2598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-15 22:27:58,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 1175 Invalid, 2598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2556 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-15 22:27:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-15 22:27:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 115. [2023-02-15 22:27:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 108 states have internal predecessors, (116), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:27:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2023-02-15 22:27:58,717 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 65 [2023-02-15 22:27:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:27:58,718 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2023-02-15 22:27:58,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 66 states have (on average 1.696969696969697) internal successors, (112), 59 states have internal predecessors, (112), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:27:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2023-02-15 22:27:58,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 22:27:58,719 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:27:58,719 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:27:58,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 22:27:58,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:27:58,927 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:27:58,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:27:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1337458320, now seen corresponding path program 1 times [2023-02-15 22:27:58,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:27:58,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567934975] [2023-02-15 22:27:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:27:58,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:27:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:00,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:28:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:00,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:28:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:00,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:28:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:28:01,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:28:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567934975] [2023-02-15 22:28:01,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567934975] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:28:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647174211] [2023-02-15 22:28:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:28:01,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:28:01,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:28:01,233 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:28:01,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 22:28:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:01,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 128 conjunts are in the unsatisfiable core [2023-02-15 22:28:01,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:28:01,646 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 [2023-02-15 22:28:01,852 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 5 treesize of output 3 [2023-02-15 22:28:02,034 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:28:02,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:28:02,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:28:02,279 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:28:02,280 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2023-02-15 22:28:02,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:28:02,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 27 [2023-02-15 22:28:02,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:28:02,628 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 7 treesize of output 3 [2023-02-15 22:28:02,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:02,937 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-15 22:28:02,938 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 2 case distinctions, treesize of input 68 treesize of output 51 [2023-02-15 22:28:02,951 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-15 22:28:02,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-02-15 22:28:02,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:02,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-02-15 22:28:03,753 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-15 22:28:03,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 161 treesize of output 114 [2023-02-15 22:28:03,769 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-02-15 22:28:03,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 48 [2023-02-15 22:28:03,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:03,883 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:28:03,884 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 2 case distinctions, treesize of input 83 treesize of output 67 [2023-02-15 22:28:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:03,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2023-02-15 22:28:03,971 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 34 treesize of output 22 [2023-02-15 22:28:04,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:28:04,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 25 [2023-02-15 22:28:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:28:04,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:28:04,801 INFO L321 Elim1Store]: treesize reduction 5, result has 89.4 percent of original size [2023-02-15 22:28:04,801 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 51 treesize of output 50 [2023-02-15 22:28:05,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647174211] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:28:05,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:28:05,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 64 [2023-02-15 22:28:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507853338] [2023-02-15 22:28:05,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:28:05,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-15 22:28:05,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:28:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-15 22:28:05,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=5861, Unknown=24, NotChecked=0, Total=6162 [2023-02-15 22:28:05,772 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 65 states, 62 states have (on average 1.8064516129032258) internal successors, (112), 56 states have internal predecessors, (112), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:28:12,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:28:12,068 INFO L93 Difference]: Finished difference Result 189 states and 206 transitions. [2023-02-15 22:28:12,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-15 22:28:12,068 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 62 states have (on average 1.8064516129032258) internal successors, (112), 56 states have internal predecessors, (112), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 68 [2023-02-15 22:28:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:28:12,069 INFO L225 Difference]: With dead ends: 189 [2023-02-15 22:28:12,069 INFO L226 Difference]: Without dead ends: 189 [2023-02-15 22:28:12,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1053, Invalid=11133, Unknown=24, NotChecked=0, Total=12210 [2023-02-15 22:28:12,070 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1290 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 2906 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-15 22:28:12,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 1270 Invalid, 2959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2906 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-15 22:28:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-15 22:28:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 119. [2023-02-15 22:28:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 112 states have internal predecessors, (122), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:28:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2023-02-15 22:28:12,075 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 68 [2023-02-15 22:28:12,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:28:12,075 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2023-02-15 22:28:12,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 62 states have (on average 1.8064516129032258) internal successors, (112), 56 states have internal predecessors, (112), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:28:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2023-02-15 22:28:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 22:28:12,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:28:12,076 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:28:12,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 22:28:12,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-15 22:28:12,285 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:28:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:28:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1337458321, now seen corresponding path program 1 times [2023-02-15 22:28:12,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:28:12,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044219463] [2023-02-15 22:28:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:28:12,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:28:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:14,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:28:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:14,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:28:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:15,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:28:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:28:16,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:28:16,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044219463] [2023-02-15 22:28:16,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044219463] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:28:16,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137238462] [2023-02-15 22:28:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:28:16,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:28:16,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:28:16,292 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:28:16,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 22:28:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:16,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 154 conjunts are in the unsatisfiable core [2023-02-15 22:28:16,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:28:16,689 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 [2023-02-15 22:28:16,747 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 5 treesize of output 3 [2023-02-15 22:28:16,924 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:28:16,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:28:17,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:28:17,334 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-15 22:28:17,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-15 22:28:17,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:28:17,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:28:17,672 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:28:17,672 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2023-02-15 22:28:17,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-15 22:28:18,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:28:18,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 37 [2023-02-15 22:28:18,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-15 22:28:18,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:28:18,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:18,583 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:28:18,583 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 2 case distinctions, treesize of input 84 treesize of output 70 [2023-02-15 22:28:18,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:18,598 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-15 22:28:18,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 38 [2023-02-15 22:28:18,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:18,620 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-15 22:28:18,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-02-15 22:28:19,702 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-15 22:28:19,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 198 treesize of output 145 [2023-02-15 22:28:19,737 INFO L321 Elim1Store]: treesize reduction 112, result has 21.1 percent of original size [2023-02-15 22:28:19,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 83 [2023-02-15 22:28:19,742 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 3 [2023-02-15 22:28:19,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:19,870 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:28:19,871 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 2 case distinctions, treesize of input 117 treesize of output 95 [2023-02-15 22:28:19,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:19,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2023-02-15 22:28:20,445 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:28:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:20,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:28:20,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 63 [2023-02-15 22:28:20,455 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 22:28:20,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2023-02-15 22:28:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:28:20,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:28:21,143 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_6623 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6623))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_6622 (Array Int Int))) (<= 0 (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6622) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse1 4)))) (not (<= 0 .cse1)))))) (forall ((v_ArrVal_6623 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6623))) (let ((.cse6 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_6622 (Array Int Int))) (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6622))) (let ((.cse3 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (+ .cse6 4))) (<= (+ (select (select .cse2 .cse3) .cse4) 4) (select |c_#length| (select (select .cse5 .cse3) .cse4)))))) (not (<= 0 .cse6))))))) is different from false [2023-02-15 22:28:21,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:28:21,848 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 195 treesize of output 199 [2023-02-15 22:28:25,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137238462] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:28:25,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:28:25,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35] total 71 [2023-02-15 22:28:25,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792273621] [2023-02-15 22:28:25,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:28:25,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-15 22:28:25,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:28:25,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-15 22:28:25,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=7208, Unknown=9, NotChecked=170, Total=7656 [2023-02-15 22:28:25,537 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 72 states, 69 states have (on average 1.7826086956521738) internal successors, (123), 63 states have internal predecessors, (123), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:28:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:28:36,949 INFO L93 Difference]: Finished difference Result 203 states and 222 transitions. [2023-02-15 22:28:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 22:28:36,950 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 69 states have (on average 1.7826086956521738) internal successors, (123), 63 states have internal predecessors, (123), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 68 [2023-02-15 22:28:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:28:36,951 INFO L225 Difference]: With dead ends: 203 [2023-02-15 22:28:36,951 INFO L226 Difference]: Without dead ends: 203 [2023-02-15 22:28:36,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=966, Invalid=12601, Unknown=9, NotChecked=230, Total=13806 [2023-02-15 22:28:36,952 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1772 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 3579 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 3642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-15 22:28:36,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 1271 Invalid, 3642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3579 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-15 22:28:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-15 22:28:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 118. [2023-02-15 22:28:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 111 states have internal predecessors, (120), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:28:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2023-02-15 22:28:36,955 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 68 [2023-02-15 22:28:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:28:36,956 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2023-02-15 22:28:36,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 69 states have (on average 1.7826086956521738) internal successors, (123), 63 states have internal predecessors, (123), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:28:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2023-02-15 22:28:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 22:28:36,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:28:36,957 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:28:36,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 22:28:37,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-15 22:28:37,166 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:28:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:28:37,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1488466325, now seen corresponding path program 1 times [2023-02-15 22:28:37,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:28:37,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430792949] [2023-02-15 22:28:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:28:37,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:28:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:38,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:28:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:38,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:28:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:38,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:28:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:28:39,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:28:39,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430792949] [2023-02-15 22:28:39,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430792949] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:28:39,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337255098] [2023-02-15 22:28:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:28:39,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:28:39,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:28:39,378 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:28:39,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 22:28:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 134 conjunts are in the unsatisfiable core [2023-02-15 22:28:39,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:28:39,772 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 [2023-02-15 22:28:39,834 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 5 treesize of output 3 [2023-02-15 22:28:39,984 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:28:39,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:28:40,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:28:40,345 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-15 22:28:40,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-15 22:28:40,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:28:40,637 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:28:40,638 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2023-02-15 22:28:41,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:28:41,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 34 [2023-02-15 22:28:41,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-15 22:28:41,029 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 7 treesize of output 3 [2023-02-15 22:28:41,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:41,331 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 11 [2023-02-15 22:28:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:41,343 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-15 22:28:41,343 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 2 case distinctions, treesize of input 87 treesize of output 62 [2023-02-15 22:28:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:41,371 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-15 22:28:41,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-02-15 22:28:42,253 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-15 22:28:42,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 161 treesize of output 112 [2023-02-15 22:28:42,267 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-02-15 22:28:42,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 33 [2023-02-15 22:28:42,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:42,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 22:28:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:42,371 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:28:42,371 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 2 case distinctions, treesize of input 83 treesize of output 65 [2023-02-15 22:28:42,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:28:42,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:28:42,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 27 [2023-02-15 22:28:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:28:42,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:28:42,907 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6918 (Array Int Int)) (v_ArrVal_6917 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6918) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= 0 (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6917))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ .cse1 4)))) (not (<= 0 .cse1))))) is different from false [2023-02-15 22:28:42,922 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6918 (Array Int Int)) (v_ArrVal_6914 Int) (v_ArrVal_6917 (Array Int Int)) (v_ArrVal_6916 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4) v_ArrVal_6914)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6918) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= 0 (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_6916) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6917))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ .cse1 4)))) (not (<= 0 .cse1))))) is different from false [2023-02-15 22:28:44,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337255098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:28:44,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:28:44,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 65 [2023-02-15 22:28:44,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444875463] [2023-02-15 22:28:44,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:28:44,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-15 22:28:44,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:28:44,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-15 22:28:44,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=5525, Unknown=6, NotChecked=302, Total=6162 [2023-02-15 22:28:44,034 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 65 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 56 states have internal predecessors, (117), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:28:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:28:48,379 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2023-02-15 22:28:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 22:28:48,379 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 56 states have internal predecessors, (117), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 69 [2023-02-15 22:28:48,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:28:48,380 INFO L225 Difference]: With dead ends: 174 [2023-02-15 22:28:48,380 INFO L226 Difference]: Without dead ends: 174 [2023-02-15 22:28:48,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=975, Invalid=9329, Unknown=6, NotChecked=402, Total=10712 [2023-02-15 22:28:48,381 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 757 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 2298 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:28:48,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 1235 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2298 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 22:28:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-15 22:28:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 117. [2023-02-15 22:28:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 110 states have internal predecessors, (118), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:28:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2023-02-15 22:28:48,385 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 69 [2023-02-15 22:28:48,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:28:48,385 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2023-02-15 22:28:48,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 56 states have internal predecessors, (117), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:28:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2023-02-15 22:28:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 22:28:48,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:28:48,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:28:48,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 22:28:48,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:28:48,593 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:28:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:28:48,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1102226234, now seen corresponding path program 1 times [2023-02-15 22:28:48,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:28:48,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429426334] [2023-02-15 22:28:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:28:48,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:28:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:51,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:28:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:51,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:28:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:52,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:28:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:28:53,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:28:53,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429426334] [2023-02-15 22:28:53,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429426334] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:28:53,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823440050] [2023-02-15 22:28:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:28:53,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:28:53,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:28:53,632 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:28:53,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 22:28:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:28:54,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 185 conjunts are in the unsatisfiable core [2023-02-15 22:28:54,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:28:54,040 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 [2023-02-15 22:28:54,122 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 5 treesize of output 3 [2023-02-15 22:28:54,322 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 22:28:54,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 22:28:54,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:28:54,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:54,555 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 21 treesize of output 20 [2023-02-15 22:28:54,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 22:28:55,219 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-15 22:28:55,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-15 22:28:55,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2023-02-15 22:28:55,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2023-02-15 22:28:55,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2023-02-15 22:28:55,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:28:55,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:28:55,690 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 22:28:55,691 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 91 [2023-02-15 22:28:55,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:55,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2023-02-15 22:28:55,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-15 22:28:56,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:28:56,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 44 [2023-02-15 22:28:56,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:28:56,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-15 22:28:56,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:56,797 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:28:56,798 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 2 case distinctions, treesize of input 99 treesize of output 79 [2023-02-15 22:28:56,813 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-15 22:28:56,813 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 1 case distinctions, treesize of input 22 treesize of output 36 [2023-02-15 22:28:56,819 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 5 treesize of output 3 [2023-02-15 22:28:56,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:56,833 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-15 22:28:56,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 38 [2023-02-15 22:28:56,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:56,860 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-15 22:28:56,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-02-15 22:28:58,151 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-15 22:28:58,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 233 treesize of output 168 [2023-02-15 22:28:58,182 INFO L321 Elim1Store]: treesize reduction 120, result has 15.5 percent of original size [2023-02-15 22:28:58,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 91 [2023-02-15 22:28:58,189 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:28:58,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:58,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 42 [2023-02-15 22:28:58,202 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 3 [2023-02-15 22:28:58,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:58,337 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 22:28:58,337 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 2 case distinctions, treesize of input 97 treesize of output 77 [2023-02-15 22:28:58,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-15 22:28:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:58,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2023-02-15 22:28:58,889 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:28:58,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:28:58,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 22:28:58,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 53 [2023-02-15 22:28:58,897 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 22:28:58,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2023-02-15 22:28:59,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 22:28:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:28:59,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:29:02,673 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_#t~ret7#1.base_59| Int) (v_ArrVal_7233 (Array Int Int)) (v_ArrVal_7232 (Array Int Int)) (v_ArrVal_7246 (Array Int Int)) (v_ArrVal_7248 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_41| Int) (v_ArrVal_7247 (Array Int Int)) (v_ArrVal_7228 Int) (v_ArrVal_7229 (Array Int Int)) (v_ArrVal_7226 Int) (v_ArrVal_7231 (Array Int Int))) (let ((.cse9 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_59| v_ArrVal_7246)) (.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_59| v_ArrVal_7248))) (let ((.cse10 (select (select .cse0 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse11 (+ (select (select .cse9 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (let ((.cse1 (select (select .cse0 .cse10) .cse11)) (.cse2 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_41| 4))) (let ((.cse7 (store (store .cse9 .cse1 (store (select .cse9 .cse1) .cse2 v_ArrVal_7228)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_59| v_ArrVal_7233))) (let ((.cse8 (select (select .cse7 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= (select (select .cse0 .cse1) .cse2) 0)) (not (< |v_ULTIMATE.start_dll_append_#t~ret7#1.base_59| |c_#StackHeapBarrier|)) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_59|))) (= (let ((.cse4 (store (store .cse0 .cse1 v_ArrVal_7229) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_59| v_ArrVal_7232))) (let ((.cse5 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (+ .cse8 4))) (select (select (store (let ((.cse3 (store |c_#memory_int| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_59| v_ArrVal_7247))) (store .cse3 .cse1 (store (select .cse3 .cse1) .cse2 v_ArrVal_7226))) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_59| v_ArrVal_7231) (select (select .cse4 .cse5) .cse6)) (select (select .cse7 .cse5) .cse6)))) |c_ULTIMATE.start_main_~data~0#1|) (< |v_ULTIMATE.start_dll_append_~last~0#1.offset_41| (select (select .cse9 .cse10) .cse11)) (<= (+ .cse8 1) 0)))))))) is different from false [2023-02-15 22:29:02,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823440050] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:29:02,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:29:02,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 79 [2023-02-15 22:29:02,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673778305] [2023-02-15 22:29:02,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:29:02,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-02-15 22:29:02,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:29:02,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-02-15 22:29:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=7627, Unknown=74, NotChecked=176, Total=8190 [2023-02-15 22:29:02,677 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand has 79 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 69 states have internal predecessors, (126), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:29:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:29:15,616 INFO L93 Difference]: Finished difference Result 172 states and 188 transitions. [2023-02-15 22:29:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 22:29:15,617 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 69 states have internal predecessors, (126), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 70 [2023-02-15 22:29:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:29:15,617 INFO L225 Difference]: With dead ends: 172 [2023-02-15 22:29:15,617 INFO L226 Difference]: Without dead ends: 172 [2023-02-15 22:29:15,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 124 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=1195, Invalid=14231, Unknown=78, NotChecked=246, Total=15750 [2023-02-15 22:29:15,618 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1189 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 3935 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 4012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3935 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-15 22:29:15,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 1164 Invalid, 4012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3935 Invalid, 2 Unknown, 0 Unchecked, 2.9s Time] [2023-02-15 22:29:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-02-15 22:29:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2023-02-15 22:29:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 100 states have (on average 1.21) internal successors, (121), 113 states have internal predecessors, (121), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:29:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 131 transitions. [2023-02-15 22:29:15,623 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 131 transitions. Word has length 70 [2023-02-15 22:29:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:29:15,623 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 131 transitions. [2023-02-15 22:29:15,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 69 states have internal predecessors, (126), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:29:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 131 transitions. [2023-02-15 22:29:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 22:29:15,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:29:15,625 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:29:15,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 22:29:15,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:29:15,833 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:29:15,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:29:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1397517466, now seen corresponding path program 2 times [2023-02-15 22:29:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:29:15,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362322823] [2023-02-15 22:29:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:29:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:29:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:29:18,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 22:29:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:29:18,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 22:29:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:29:18,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 22:29:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:29:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:29:19,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:29:19,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362322823] [2023-02-15 22:29:19,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362322823] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:29:19,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194238309] [2023-02-15 22:29:19,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:29:19,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:29:19,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:29:19,323 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:29:19,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 22:29:19,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:29:19,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:29:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 127 conjunts are in the unsatisfiable core [2023-02-15 22:29:19,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:29:20,359 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 13 [2023-02-15 22:29:20,362 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 7 treesize of output 3 [2023-02-15 22:29:20,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-02-15 22:29:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:29:20,785 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 31 [2023-02-15 22:29:20,798 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 22:29:20,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 22:29:20,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:29:20,816 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 14 treesize of output 16 [2023-02-15 22:29:21,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:29:21,735 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2023-02-15 22:29:21,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 129 treesize of output 93 [2023-02-15 22:29:21,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:29:21,758 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-02-15 22:29:21,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 61 [2023-02-15 22:29:21,909 INFO L321 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2023-02-15 22:29:21,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 83 [2023-02-15 22:29:21,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:29:21,926 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-02-15 22:29:21,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 143 [2023-02-15 22:29:22,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:29:22,592 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 22:29:22,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 119 [2023-02-15 22:29:22,921 INFO L321 Elim1Store]: treesize reduction 48, result has 30.4 percent of original size [2023-02-15 22:29:22,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 135 treesize of output 64 [2023-02-15 22:29:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:29:23,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:29:23,600 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_append_~new_last~0#1.offset| Int) (v_ArrVal_7529 (Array Int Int))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_7529))) (let ((.cse0 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse0)) (= (select |c_#valid| (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base|) (+ |ULTIMATE.start_dll_append_~new_last~0#1.offset| 8) |c_ULTIMATE.start_dll_append_~last~0#1.base|)))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (+ .cse0 4))) (select (select .cse1 (select (select .cse1 .cse2) .cse3)) (+ (select (select .cse4 .cse2) .cse3) 4))))) 1))))) is different from false [2023-02-15 22:29:26,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194238309] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:29:26,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:29:26,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 30] total 68 [2023-02-15 22:29:26,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613474634] [2023-02-15 22:29:26,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:29:26,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-15 22:29:26,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:29:26,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-15 22:29:26,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6734, Unknown=3, NotChecked=164, Total=7140 [2023-02-15 22:29:26,172 INFO L87 Difference]: Start difference. First operand 120 states and 131 transitions. Second operand has 69 states, 66 states have (on average 2.0) internal successors, (132), 62 states have internal predecessors, (132), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 22:29:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:29:38,096 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2023-02-15 22:29:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-15 22:29:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 66 states have (on average 2.0) internal successors, (132), 62 states have internal predecessors, (132), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 73 [2023-02-15 22:29:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:29:38,097 INFO L225 Difference]: With dead ends: 194 [2023-02-15 22:29:38,097 INFO L226 Difference]: Without dead ends: 194 [2023-02-15 22:29:38,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 120 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2443 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=1179, Invalid=13340, Unknown=5, NotChecked=238, Total=14762 [2023-02-15 22:29:38,099 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1889 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 4052 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1889 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 4114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 4052 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:29:38,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1889 Valid, 1327 Invalid, 4114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 4052 Invalid, 2 Unknown, 0 Unchecked, 3.1s Time] [2023-02-15 22:29:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-02-15 22:29:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 124. [2023-02-15 22:29:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 117 states have internal predecessors, (127), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 22:29:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2023-02-15 22:29:38,102 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 73 [2023-02-15 22:29:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:29:38,103 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2023-02-15 22:29:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 66 states have (on average 2.0) internal successors, (132), 62 states have internal predecessors, (132), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 22:29:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2023-02-15 22:29:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 22:29:38,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:29:38,104 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:29:38,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-15 22:29:38,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-15 22:29:38,312 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-15 22:29:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:29:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1397517467, now seen corresponding path program 2 times [2023-02-15 22:29:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:29:38,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50956043] [2023-02-15 22:29:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:29:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:29:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat