./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/array-memsafety/openbsd_cstrncat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:56:51,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:56:51,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:56:51,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:56:51,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:56:51,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:56:51,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:56:51,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:56:51,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:56:51,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:56:51,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:56:51,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:56:51,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:56:51,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:56:51,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:56:51,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:56:51,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:56:51,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:56:51,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:56:51,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:56:51,938 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:56:51,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:56:51,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:56:51,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:56:51,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:56:51,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:56:51,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:56:51,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:56:51,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:56:51,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:56:51,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:56:51,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:56:51,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:56:51,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:56:51,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:56:51,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:56:51,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:56:51,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:56:51,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:56:51,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:56:51,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:56:51,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:56:51,959 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 16:56:51,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:56:51,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:56:51,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:56:51,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:56:51,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:56:51,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:56:51,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:56:51,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:56:51,978 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:56:51,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:56:51,986 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:56:51,986 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:56:51,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:56:51,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:56:51,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:56:51,987 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:56:51,987 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:56:51,987 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 16:56:51,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:56:51,988 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:56:51,988 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:56:51,988 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:56:51,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:56:51,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:56:51,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:56:51,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:56:51,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:56:51,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:56:51,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:56:51,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:56:51,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2022-07-21 16:56:52,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:56:52,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:56:52,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:56:52,282 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:56:52,288 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:56:52,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2022-07-21 16:56:52,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70bb4f9e/232a72669b5044cf8c406e90e1e31de1/FLAG7b98e75bc [2022-07-21 16:56:52,743 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:56:52,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2022-07-21 16:56:52,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70bb4f9e/232a72669b5044cf8c406e90e1e31de1/FLAG7b98e75bc [2022-07-21 16:56:52,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70bb4f9e/232a72669b5044cf8c406e90e1e31de1 [2022-07-21 16:56:52,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:56:52,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:56:52,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:56:52,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:56:52,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:56:52,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:56:52" (1/1) ... [2022-07-21 16:56:52,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2947c85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:52, skipping insertion in model container [2022-07-21 16:56:52,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:56:52" (1/1) ... [2022-07-21 16:56:52,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:56:52,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:56:52,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:56:53,000 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:56:53,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:56:53,060 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:56:53,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53 WrapperNode [2022-07-21 16:56:53,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:56:53,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:56:53,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:56:53,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:56:53,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (1/1) ... [2022-07-21 16:56:53,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (1/1) ... [2022-07-21 16:56:53,111 INFO L137 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-07-21 16:56:53,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:56:53,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:56:53,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:56:53,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:56:53,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (1/1) ... [2022-07-21 16:56:53,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (1/1) ... [2022-07-21 16:56:53,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (1/1) ... [2022-07-21 16:56:53,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (1/1) ... [2022-07-21 16:56:53,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (1/1) ... [2022-07-21 16:56:53,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (1/1) ... [2022-07-21 16:56:53,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (1/1) ... [2022-07-21 16:56:53,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:56:53,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:56:53,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:56:53,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:56:53,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (1/1) ... [2022-07-21 16:56:53,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:56:53,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:53,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 16:56:53,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 16:56:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 16:56:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 16:56:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 16:56:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:56:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:56:53,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:56:53,363 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:56:53,364 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:56:53,575 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:56:53,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:56:53,580 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 16:56:53,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:56:53 BoogieIcfgContainer [2022-07-21 16:56:53,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:56:53,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:56:53,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:56:53,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:56:53,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:56:52" (1/3) ... [2022-07-21 16:56:53,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dfffc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:56:53, skipping insertion in model container [2022-07-21 16:56:53,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:53" (2/3) ... [2022-07-21 16:56:53,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dfffc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:56:53, skipping insertion in model container [2022-07-21 16:56:53,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:56:53" (3/3) ... [2022-07-21 16:56:53,588 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2022-07-21 16:56:53,597 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:56:53,598 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-07-21 16:56:53,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:56:53,638 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@713d867c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3564fd8 [2022-07-21 16:56:53,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-07-21 16:56:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.96875) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:56:53,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:53,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:53,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031113, now seen corresponding path program 1 times [2022-07-21 16:56:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:53,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366774651] [2022-07-21 16:56:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:53,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:53,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366774651] [2022-07-21 16:56:53,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366774651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:53,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:53,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:56:53,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481505085] [2022-07-21 16:56:53,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:53,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:56:53,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:53,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:56:53,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:56:53,788 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.96875) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:53,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:53,849 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-07-21 16:56:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:56:53,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 16:56:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:53,858 INFO L225 Difference]: With dead ends: 51 [2022-07-21 16:56:53,858 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 16:56:53,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:56:53,863 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:53,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 86 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 16:56:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-21 16:56:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-21 16:56:53,892 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 7 [2022-07-21 16:56:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:53,897 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-21 16:56:53,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-21 16:56:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:56:53,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:53,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:53,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 16:56:53,900 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:53,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:53,900 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-21 16:56:53,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:53,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959677562] [2022-07-21 16:56:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:53,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:53,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:53,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959677562] [2022-07-21 16:56:53,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959677562] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:53,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:53,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:56:53,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266862817] [2022-07-21 16:56:53,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:53,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:56:53,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:53,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:56:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:56:53,995 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:54,055 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-07-21 16:56:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:56:54,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 16:56:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:54,057 INFO L225 Difference]: With dead ends: 51 [2022-07-21 16:56:54,058 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 16:56:54,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:56:54,060 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:54,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 185 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 16:56:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-21 16:56:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-07-21 16:56:54,068 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2022-07-21 16:56:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:54,068 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-07-21 16:56:54,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-07-21 16:56:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:56:54,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:54,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:54,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 16:56:54,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-21 16:56:54,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:54,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298312373] [2022-07-21 16:56:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:54,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:54,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298312373] [2022-07-21 16:56:54,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298312373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:54,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:54,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:56:54,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996266014] [2022-07-21 16:56:54,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:54,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:56:54,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:54,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:56:54,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:56:54,133 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:54,171 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-07-21 16:56:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:56:54,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 16:56:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:54,172 INFO L225 Difference]: With dead ends: 46 [2022-07-21 16:56:54,172 INFO L226 Difference]: Without dead ends: 46 [2022-07-21 16:56:54,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:56:54,173 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 42 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:54,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-21 16:56:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-21 16:56:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-21 16:56:54,176 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 8 [2022-07-21 16:56:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:54,176 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-21 16:56:54,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-21 16:56:54,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:56:54,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:54,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:54,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 16:56:54,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:54,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:54,182 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2022-07-21 16:56:54,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:54,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304028296] [2022-07-21 16:56:54,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:54,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:54,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304028296] [2022-07-21 16:56:54,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304028296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:54,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:54,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:56:54,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673657389] [2022-07-21 16:56:54,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:54,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:56:54,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:54,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:56:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:56:54,269 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:54,330 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-07-21 16:56:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:56:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 16:56:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:54,334 INFO L225 Difference]: With dead ends: 85 [2022-07-21 16:56:54,334 INFO L226 Difference]: Without dead ends: 85 [2022-07-21 16:56:54,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:56:54,335 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 132 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:54,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-21 16:56:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 48. [2022-07-21 16:56:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-21 16:56:54,340 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 8 [2022-07-21 16:56:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:54,340 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-21 16:56:54,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-21 16:56:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:56:54,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:54,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:54,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 16:56:54,341 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2022-07-21 16:56:54,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:54,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574156786] [2022-07-21 16:56:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:54,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:54,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:54,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574156786] [2022-07-21 16:56:54,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574156786] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:54,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:54,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:56:54,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995984197] [2022-07-21 16:56:54,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:54,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:56:54,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:56:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:56:54,378 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:54,413 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-21 16:56:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:56:54,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:56:54,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:54,414 INFO L225 Difference]: With dead ends: 50 [2022-07-21 16:56:54,415 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 16:56:54,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:56:54,416 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 103 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:54,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 84 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:54,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 16:56:54,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-07-21 16:56:54,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-07-21 16:56:54,419 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 10 [2022-07-21 16:56:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:54,420 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-07-21 16:56:54,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-07-21 16:56:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 16:56:54,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:54,421 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:54,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 16:56:54,421 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:54,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2022-07-21 16:56:54,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:54,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056982636] [2022-07-21 16:56:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:54,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:54,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056982636] [2022-07-21 16:56:54,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056982636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385454621] [2022-07-21 16:56:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:54,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:54,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:54,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 16:56:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:54,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:56:54,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:54,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:56:54,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-07-21 16:56:54,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:56:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:54,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:54,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385454621] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:54,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:54,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-21 16:56:54,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248228839] [2022-07-21 16:56:54,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:54,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:56:54,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:54,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:56:54,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:56:54,894 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:55,036 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-07-21 16:56:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:56:55,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 16:56:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:55,040 INFO L225 Difference]: With dead ends: 85 [2022-07-21 16:56:55,040 INFO L226 Difference]: Without dead ends: 85 [2022-07-21 16:56:55,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:56:55,047 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 90 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:55,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 179 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:56:55,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-21 16:56:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 46. [2022-07-21 16:56:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.65625) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-21 16:56:55,060 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2022-07-21 16:56:55,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:55,060 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-21 16:56:55,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:55,061 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-21 16:56:55,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:56:55,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:55,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:55,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:55,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 16:56:55,281 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:55,281 INFO L85 PathProgramCache]: Analyzing trace with hash 840060780, now seen corresponding path program 1 times [2022-07-21 16:56:55,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:55,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819911978] [2022-07-21 16:56:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:55,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:55,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:55,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819911978] [2022-07-21 16:56:55,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819911978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:55,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166941358] [2022-07-21 16:56:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:55,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:55,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:55,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:55,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 16:56:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:55,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 16:56:55,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:55,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:56:55,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166941358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:55,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:56:55,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2022-07-21 16:56:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238691386] [2022-07-21 16:56:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:55,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:56:55,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:56:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:56:55,659 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:55,731 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-21 16:56:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:56:55,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 16:56:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:55,734 INFO L225 Difference]: With dead ends: 45 [2022-07-21 16:56:55,734 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 16:56:55,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:56:55,736 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 213 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:55,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 57 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 16:56:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-21 16:56:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.625) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-07-21 16:56:55,749 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2022-07-21 16:56:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:55,750 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-07-21 16:56:55,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-07-21 16:56:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:56:55,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:55,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:55,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:55,969 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,SelfDestructingSolverStorable6 [2022-07-21 16:56:55,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:55,971 INFO L85 PathProgramCache]: Analyzing trace with hash 840060832, now seen corresponding path program 1 times [2022-07-21 16:56:55,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:55,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659344552] [2022-07-21 16:56:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:55,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:56,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:56,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659344552] [2022-07-21 16:56:56,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659344552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:56,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:56,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:56:56,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285624986] [2022-07-21 16:56:56,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:56,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:56:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:56,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:56:56,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:56:56,033 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:56,049 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-07-21 16:56:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:56:56,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 16:56:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:56,050 INFO L225 Difference]: With dead ends: 81 [2022-07-21 16:56:56,050 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 16:56:56,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:56:56,051 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 33 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:56,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 129 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:56,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 16:56:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-07-21 16:56:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-21 16:56:56,057 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2022-07-21 16:56:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:56,058 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-21 16:56:56,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,058 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-21 16:56:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:56:56,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:56,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:56,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 16:56:56,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:56,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:56,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125410, now seen corresponding path program 1 times [2022-07-21 16:56:56,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:56,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380190179] [2022-07-21 16:56:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:56,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:56,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:56,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380190179] [2022-07-21 16:56:56,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380190179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:56,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:56,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:56:56,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432766963] [2022-07-21 16:56:56,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:56,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:56:56,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:56,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:56:56,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:56:56,081 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:56,095 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-07-21 16:56:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:56:56,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 16:56:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:56,096 INFO L225 Difference]: With dead ends: 52 [2022-07-21 16:56:56,096 INFO L226 Difference]: Without dead ends: 52 [2022-07-21 16:56:56,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:56:56,097 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:56,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-21 16:56:56,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-21 16:56:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-07-21 16:56:56,100 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 14 [2022-07-21 16:56:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:56,100 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-07-21 16:56:56,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-07-21 16:56:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:56:56,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:56,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:56,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 16:56:56,101 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2022-07-21 16:56:56,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:56,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448952432] [2022-07-21 16:56:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:56,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:56,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:56,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448952432] [2022-07-21 16:56:56,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448952432] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:56,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:56,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:56:56,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457829480] [2022-07-21 16:56:56,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:56,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:56:56,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:56,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:56:56,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:56:56,137 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:56,182 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-07-21 16:56:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:56:56,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 16:56:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:56,183 INFO L225 Difference]: With dead ends: 82 [2022-07-21 16:56:56,183 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 16:56:56,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:56:56,183 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 177 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:56,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 60 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 16:56:56,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2022-07-21 16:56:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-07-21 16:56:56,186 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 14 [2022-07-21 16:56:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:56,186 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-07-21 16:56:56,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-07-21 16:56:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 16:56:56,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:56,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:56,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 16:56:56,188 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:56,188 INFO L85 PathProgramCache]: Analyzing trace with hash 272080408, now seen corresponding path program 1 times [2022-07-21 16:56:56,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:56,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054035720] [2022-07-21 16:56:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:56,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:56,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:56,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054035720] [2022-07-21 16:56:56,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054035720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:56,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:56,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:56:56,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865707188] [2022-07-21 16:56:56,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:56,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:56:56,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:56:56,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:56:56,218 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:56,234 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-07-21 16:56:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:56:56,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-21 16:56:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:56,235 INFO L225 Difference]: With dead ends: 53 [2022-07-21 16:56:56,235 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 16:56:56,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:56:56,236 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 74 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:56,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 35 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 16:56:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-21 16:56:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-07-21 16:56:56,238 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 15 [2022-07-21 16:56:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:56,239 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-07-21 16:56:56,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-07-21 16:56:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:56:56,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:56,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:56,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 16:56:56,240 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash 944154227, now seen corresponding path program 1 times [2022-07-21 16:56:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:56,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930685094] [2022-07-21 16:56:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:56,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:56,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930685094] [2022-07-21 16:56:56,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930685094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:56,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:56,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:56:56,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123815128] [2022-07-21 16:56:56,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:56,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:56:56,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:56:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:56:56,268 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:56,309 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-07-21 16:56:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:56:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:56:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:56,310 INFO L225 Difference]: With dead ends: 52 [2022-07-21 16:56:56,310 INFO L226 Difference]: Without dead ends: 52 [2022-07-21 16:56:56,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:56:56,311 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 59 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:56,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 63 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-21 16:56:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-07-21 16:56:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-21 16:56:56,313 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 18 [2022-07-21 16:56:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:56,313 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-21 16:56:56,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-21 16:56:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:56:56,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:56,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:56,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 16:56:56,314 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:56,315 INFO L85 PathProgramCache]: Analyzing trace with hash 944154228, now seen corresponding path program 1 times [2022-07-21 16:56:56,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:56,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638787357] [2022-07-21 16:56:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:56,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:56,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:56,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638787357] [2022-07-21 16:56:56,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638787357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:56,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883584697] [2022-07-21 16:56:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:56,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:56,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:56,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:56,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 16:56:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:56,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 16:56:56,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:56,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:56:56,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-07-21 16:56:56,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:56:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:56,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:56:56,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883584697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:56,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:56:56,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2022-07-21 16:56:56,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227590345] [2022-07-21 16:56:56,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:56,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:56:56,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:56,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:56:56,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:56:56,521 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:56,586 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-07-21 16:56:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:56:56,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:56:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:56,587 INFO L225 Difference]: With dead ends: 63 [2022-07-21 16:56:56,587 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 16:56:56,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-21 16:56:56,588 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 176 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:56,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 72 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 16:56:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-07-21 16:56:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.42) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-21 16:56:56,590 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 18 [2022-07-21 16:56:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:56,590 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-21 16:56:56,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-21 16:56:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:56:56,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:56,591 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:56,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:56,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:56,807 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:56,807 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2022-07-21 16:56:56,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:56,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574783325] [2022-07-21 16:56:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:56,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:56,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574783325] [2022-07-21 16:56:56,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574783325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793526631] [2022-07-21 16:56:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:56,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:56,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:56,854 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:56,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 16:56:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:56,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 16:56:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:56,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:56,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793526631] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:56,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:56,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-21 16:56:56,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900780416] [2022-07-21 16:56:56,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:56,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:56:56,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:56,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:56:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:56:56,974 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:57,108 INFO L93 Difference]: Finished difference Result 133 states and 163 transitions. [2022-07-21 16:56:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:56:57,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:56:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:57,109 INFO L225 Difference]: With dead ends: 133 [2022-07-21 16:56:57,109 INFO L226 Difference]: Without dead ends: 133 [2022-07-21 16:56:57,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:56:57,110 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 341 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:57,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 231 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:56:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-21 16:56:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 61. [2022-07-21 16:56:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 60 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2022-07-21 16:56:57,113 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 18 [2022-07-21 16:56:57,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:57,113 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2022-07-21 16:56:57,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2022-07-21 16:56:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 16:56:57,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:57,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:57,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:57,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:57,332 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1095465713, now seen corresponding path program 1 times [2022-07-21 16:56:57,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:57,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357725482] [2022-07-21 16:56:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:57,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:57,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:57,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357725482] [2022-07-21 16:56:57,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357725482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:57,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:57,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:56:57,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230089195] [2022-07-21 16:56:57,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:57,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:56:57,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:56:57,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:56:57,377 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:57,393 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2022-07-21 16:56:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:56:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-21 16:56:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:57,394 INFO L225 Difference]: With dead ends: 130 [2022-07-21 16:56:57,394 INFO L226 Difference]: Without dead ends: 130 [2022-07-21 16:56:57,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:56:57,395 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:57,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 134 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-21 16:56:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2022-07-21 16:56:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 89 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2022-07-21 16:56:57,397 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 20 [2022-07-21 16:56:57,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:57,397 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2022-07-21 16:56:57,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:57,397 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2022-07-21 16:56:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 16:56:57,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:57,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:57,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 16:56:57,398 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1094114349, now seen corresponding path program 1 times [2022-07-21 16:56:57,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:57,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910481091] [2022-07-21 16:56:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:57,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:57,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910481091] [2022-07-21 16:56:57,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910481091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:57,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608274166] [2022-07-21 16:56:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:57,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:57,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:57,464 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:57,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 16:56:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:57,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 16:56:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:57,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:56:57,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-07-21 16:56:57,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:56:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:57,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:57,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:56:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:57,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608274166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:57,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:57,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-07-21 16:56:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219273262] [2022-07-21 16:56:57,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:57,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 16:56:57,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 16:56:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-21 16:56:57,732 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:57,888 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2022-07-21 16:56:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:56:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-21 16:56:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:57,889 INFO L225 Difference]: With dead ends: 121 [2022-07-21 16:56:57,889 INFO L226 Difference]: Without dead ends: 121 [2022-07-21 16:56:57,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-07-21 16:56:57,890 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 510 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:57,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 144 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:56:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-21 16:56:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2022-07-21 16:56:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.348314606741573) internal successors, (120), 95 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2022-07-21 16:56:57,893 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 20 [2022-07-21 16:56:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:57,893 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2022-07-21 16:56:57,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2022-07-21 16:56:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 16:56:57,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:57,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:57,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:58,110 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,SelfDestructingSolverStorable15 [2022-07-21 16:56:58,111 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:58,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:58,111 INFO L85 PathProgramCache]: Analyzing trace with hash 74397359, now seen corresponding path program 1 times [2022-07-21 16:56:58,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:58,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824857208] [2022-07-21 16:56:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:58,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:58,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:58,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824857208] [2022-07-21 16:56:58,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824857208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:58,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:58,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:56:58,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161802544] [2022-07-21 16:56:58,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:58,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:56:58,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:56:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:56:58,156 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:58,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:58,169 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2022-07-21 16:56:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:56:58,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-21 16:56:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:58,170 INFO L225 Difference]: With dead ends: 108 [2022-07-21 16:56:58,170 INFO L226 Difference]: Without dead ends: 108 [2022-07-21 16:56:58,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:56:58,170 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:58,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 74 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-21 16:56:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2022-07-21 16:56:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.4) internal successors, (84), 66 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2022-07-21 16:56:58,172 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 20 [2022-07-21 16:56:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:58,173 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2022-07-21 16:56:58,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2022-07-21 16:56:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:56:58,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:58,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:58,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 16:56:58,176 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash -442195040, now seen corresponding path program 1 times [2022-07-21 16:56:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:58,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397680530] [2022-07-21 16:56:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:58,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:58,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397680530] [2022-07-21 16:56:58,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397680530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:58,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:58,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:56:58,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796707218] [2022-07-21 16:56:58,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:56:58,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:58,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:56:58,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:56:58,214 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:58,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:58,255 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-07-21 16:56:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:56:58,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 16:56:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:58,257 INFO L225 Difference]: With dead ends: 66 [2022-07-21 16:56:58,257 INFO L226 Difference]: Without dead ends: 66 [2022-07-21 16:56:58,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:56:58,258 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 66 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:58,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 84 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-21 16:56:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-21 16:56:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.35) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-07-21 16:56:58,263 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2022-07-21 16:56:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:58,264 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-07-21 16:56:58,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-07-21 16:56:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:56:58,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:58,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:58,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 16:56:58,265 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:58,265 INFO L85 PathProgramCache]: Analyzing trace with hash -442195039, now seen corresponding path program 1 times [2022-07-21 16:56:58,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:58,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792176917] [2022-07-21 16:56:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:58,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:58,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:58,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792176917] [2022-07-21 16:56:58,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792176917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:56:58,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:56:58,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 16:56:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538993651] [2022-07-21 16:56:58,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:56:58,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:56:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:56:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:56:58,350 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:58,429 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-07-21 16:56:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:56:58,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 16:56:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:58,430 INFO L225 Difference]: With dead ends: 70 [2022-07-21 16:56:58,430 INFO L226 Difference]: Without dead ends: 70 [2022-07-21 16:56:58,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:56:58,431 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 138 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:58,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 90 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:56:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-21 16:56:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-07-21 16:56:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2022-07-21 16:56:58,434 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 21 [2022-07-21 16:56:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:58,435 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2022-07-21 16:56:58,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2022-07-21 16:56:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 16:56:58,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:58,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:58,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 16:56:58,436 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash -823097434, now seen corresponding path program 2 times [2022-07-21 16:56:58,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:58,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393150397] [2022-07-21 16:56:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:58,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:58,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:58,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393150397] [2022-07-21 16:56:58,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393150397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:58,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958358564] [2022-07-21 16:56:58,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:56:58,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:58,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:58,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:58,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 16:56:58,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:56:58,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 16:56:58,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:58,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:56:58,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:56:58,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:56:58,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:56:58,983 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:58,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-21 16:56:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:58,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:59,058 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_237 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_~d~0#1.offset_19| Int)) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrncat_~d~0#1.offset_19|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_237) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrncat_~d~0#1.offset_19|) 0) (not (<= 0 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_19|)))) is different from false [2022-07-21 16:56:59,076 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:59,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-21 16:56:59,082 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:59,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-07-21 16:56:59,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:56:59,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:56:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:59,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958358564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:59,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:59,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-07-21 16:56:59,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015243263] [2022-07-21 16:56:59,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:59,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 16:56:59,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:59,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 16:56:59,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=527, Unknown=1, NotChecked=46, Total=650 [2022-07-21 16:56:59,369 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:59,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:59,635 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-07-21 16:56:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:56:59,636 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 16:56:59,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:59,636 INFO L225 Difference]: With dead ends: 86 [2022-07-21 16:56:59,636 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 16:56:59,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=847, Unknown=1, NotChecked=60, Total=1056 [2022-07-21 16:56:59,637 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 96 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:59,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 435 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 159 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-07-21 16:56:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 16:56:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-07-21 16:56:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-07-21 16:56:59,638 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 22 [2022-07-21 16:56:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:59,639 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-07-21 16:56:59,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-07-21 16:56:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 16:56:59,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:59,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:59,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:59,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:59,840 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:56:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:59,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1863163671, now seen corresponding path program 2 times [2022-07-21 16:56:59,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:59,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697936885] [2022-07-21 16:56:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:59,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:59,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:59,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697936885] [2022-07-21 16:56:59,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697936885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:59,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653590739] [2022-07-21 16:56:59,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:56:59,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:59,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:59,924 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:59,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 16:56:59,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:56:59,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:59,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 16:56:59,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:00,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:00,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653590739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:00,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:00,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 16:57:00,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71371917] [2022-07-21 16:57:00,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:00,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 16:57:00,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:00,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 16:57:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:57:00,123 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:00,385 INFO L93 Difference]: Finished difference Result 234 states and 274 transitions. [2022-07-21 16:57:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 16:57:00,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 16:57:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:00,396 INFO L225 Difference]: With dead ends: 234 [2022-07-21 16:57:00,396 INFO L226 Difference]: Without dead ends: 234 [2022-07-21 16:57:00,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 16:57:00,397 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 775 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:00,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 331 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:57:00,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-21 16:57:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 89. [2022-07-21 16:57:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 88 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2022-07-21 16:57:00,399 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 22 [2022-07-21 16:57:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:00,399 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2022-07-21 16:57:00,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2022-07-21 16:57:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 16:57:00,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:00,400 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:00,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:00,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:00,617 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:00,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1330977111, now seen corresponding path program 3 times [2022-07-21 16:57:00,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:00,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596241338] [2022-07-21 16:57:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:00,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:00,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:00,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596241338] [2022-07-21 16:57:00,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596241338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:00,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100078955] [2022-07-21 16:57:00,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:57:00,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:00,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:00,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:00,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 16:57:00,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:57:00,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 16:57:00,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:00,811 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:00,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:00,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:01,047 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:01,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-21 16:57:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:01,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:01,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-07-21 16:57:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:01,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100078955] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:01,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:01,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2022-07-21 16:57:01,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766010830] [2022-07-21 16:57:01,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:01,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 16:57:01,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 16:57:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-07-21 16:57:01,407 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand has 29 states, 28 states have (on average 2.5) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:02,259 INFO L93 Difference]: Finished difference Result 222 states and 253 transitions. [2022-07-21 16:57:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 16:57:02,259 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-21 16:57:02,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:02,260 INFO L225 Difference]: With dead ends: 222 [2022-07-21 16:57:02,260 INFO L226 Difference]: Without dead ends: 222 [2022-07-21 16:57:02,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=383, Invalid=2167, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 16:57:02,261 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 407 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:02,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 716 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 745 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-07-21 16:57:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-21 16:57:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 99. [2022-07-21 16:57:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.2903225806451613) internal successors, (120), 98 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2022-07-21 16:57:02,264 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 26 [2022-07-21 16:57:02,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:02,264 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2022-07-21 16:57:02,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2022-07-21 16:57:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 16:57:02,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:02,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:02,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 16:57:02,471 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,SelfDestructingSolverStorable21 [2022-07-21 16:57:02,471 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:02,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1807429356, now seen corresponding path program 3 times [2022-07-21 16:57:02,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:02,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107083962] [2022-07-21 16:57:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:02,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:57:02,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:02,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107083962] [2022-07-21 16:57:02,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107083962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:02,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203884402] [2022-07-21 16:57:02,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:57:02,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:02,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:02,538 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:02,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 16:57:02,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 16:57:02,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:02,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:57:02,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:02,626 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:02,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:57:02,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:57:02,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203884402] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:02,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:02,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-21 16:57:02,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055639420] [2022-07-21 16:57:02,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:02,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:57:02,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:02,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:57:02,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:57:02,849 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:02,957 INFO L93 Difference]: Finished difference Result 194 states and 236 transitions. [2022-07-21 16:57:02,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:57:02,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-21 16:57:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:02,958 INFO L225 Difference]: With dead ends: 194 [2022-07-21 16:57:02,958 INFO L226 Difference]: Without dead ends: 194 [2022-07-21 16:57:02,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:57:02,959 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 208 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:02,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 180 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:57:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-21 16:57:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 96. [2022-07-21 16:57:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 95 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2022-07-21 16:57:02,961 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 26 [2022-07-21 16:57:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:02,961 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2022-07-21 16:57:02,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2022-07-21 16:57:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 16:57:02,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:02,962 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 16:57:02,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:03,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:03,172 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:03,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:03,172 INFO L85 PathProgramCache]: Analyzing trace with hash 803583084, now seen corresponding path program 1 times [2022-07-21 16:57:03,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:03,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284706278] [2022-07-21 16:57:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:03,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:03,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:03,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284706278] [2022-07-21 16:57:03,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284706278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:57:03,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:57:03,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:57:03,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057311995] [2022-07-21 16:57:03,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:57:03,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:57:03,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:57:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:57:03,237 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:03,264 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-07-21 16:57:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:57:03,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-21 16:57:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:03,264 INFO L225 Difference]: With dead ends: 95 [2022-07-21 16:57:03,265 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 16:57:03,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:57:03,265 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:03,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 65 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:57:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 16:57:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-21 16:57:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-21 16:57:03,268 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 27 [2022-07-21 16:57:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:03,268 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-21 16:57:03,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-21 16:57:03,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 16:57:03,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:03,268 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 16:57:03,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 16:57:03,269 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:03,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash 805151438, now seen corresponding path program 1 times [2022-07-21 16:57:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:03,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867006656] [2022-07-21 16:57:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:03,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:03,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:03,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867006656] [2022-07-21 16:57:03,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867006656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:57:03,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:57:03,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:57:03,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508224376] [2022-07-21 16:57:03,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:57:03,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:57:03,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:03,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:57:03,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:57:03,318 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:03,356 INFO L93 Difference]: Finished difference Result 167 states and 189 transitions. [2022-07-21 16:57:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:57:03,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-21 16:57:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:03,357 INFO L225 Difference]: With dead ends: 167 [2022-07-21 16:57:03,357 INFO L226 Difference]: Without dead ends: 147 [2022-07-21 16:57:03,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:57:03,357 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:03,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:57:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-21 16:57:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2022-07-21 16:57:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 143 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2022-07-21 16:57:03,360 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 27 [2022-07-21 16:57:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:03,360 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2022-07-21 16:57:03,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:03,361 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2022-07-21 16:57:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 16:57:03,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:03,361 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 16:57:03,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 16:57:03,361 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:03,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:03,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1000286896, now seen corresponding path program 1 times [2022-07-21 16:57:03,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:03,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641941812] [2022-07-21 16:57:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:03,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:03,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:03,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641941812] [2022-07-21 16:57:03,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641941812] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:03,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833128414] [2022-07-21 16:57:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:03,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:03,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:03,441 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:03,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 16:57:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:03,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 16:57:03,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:03,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:03,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:57:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:03,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:57:03,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833128414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:57:03,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:57:03,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-07-21 16:57:03,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756320953] [2022-07-21 16:57:03,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:57:03,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:57:03,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:03,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:57:03,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:57:03,625 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:03,734 INFO L93 Difference]: Finished difference Result 193 states and 216 transitions. [2022-07-21 16:57:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:57:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-21 16:57:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:03,735 INFO L225 Difference]: With dead ends: 193 [2022-07-21 16:57:03,736 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 16:57:03,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-21 16:57:03,736 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:03,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 213 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:57:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 16:57:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 145. [2022-07-21 16:57:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.177304964539007) internal successors, (166), 144 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2022-07-21 16:57:03,739 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 27 [2022-07-21 16:57:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:03,739 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2022-07-21 16:57:03,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2022-07-21 16:57:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 16:57:03,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:03,740 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 16:57:03,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:03,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 16:57:03,967 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:03,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1134300402, now seen corresponding path program 1 times [2022-07-21 16:57:03,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:03,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111597723] [2022-07-21 16:57:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:03,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:04,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:04,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111597723] [2022-07-21 16:57:04,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111597723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:04,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891408643] [2022-07-21 16:57:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:04,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:04,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:04,072 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) [2022-07-21 16:57:04,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 16:57:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:04,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 16:57:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:04,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:04,265 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:04,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-21 16:57:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:04,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:04,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:57:04,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:57:04,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:57:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:04,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891408643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:04,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:04,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-21 16:57:04,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853630878] [2022-07-21 16:57:04,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:04,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 16:57:04,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:04,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 16:57:04,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:57:04,552 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:04,859 INFO L93 Difference]: Finished difference Result 195 states and 216 transitions. [2022-07-21 16:57:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 16:57:04,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-21 16:57:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:04,860 INFO L225 Difference]: With dead ends: 195 [2022-07-21 16:57:04,860 INFO L226 Difference]: Without dead ends: 181 [2022-07-21 16:57:04,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 16:57:04,861 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:04,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 298 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 220 Invalid, 0 Unknown, 185 Unchecked, 0.1s Time] [2022-07-21 16:57:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-21 16:57:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 149. [2022-07-21 16:57:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.1655172413793105) internal successors, (169), 148 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2022-07-21 16:57:04,863 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 27 [2022-07-21 16:57:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:04,863 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2022-07-21 16:57:04,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2022-07-21 16:57:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 16:57:04,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:04,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:04,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:05,071 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,SelfDestructingSolverStorable26 [2022-07-21 16:57:05,071 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:05,072 INFO L85 PathProgramCache]: Analyzing trace with hash 831251234, now seen corresponding path program 4 times [2022-07-21 16:57:05,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:05,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075220811] [2022-07-21 16:57:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:05,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:05,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:05,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075220811] [2022-07-21 16:57:05,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075220811] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:05,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526891069] [2022-07-21 16:57:05,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:57:05,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:05,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:05,303 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) [2022-07-21 16:57:05,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 16:57:05,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:57:05,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:05,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 16:57:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:05,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:05,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:57:05,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:57:05,698 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-21 16:57:05,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-21 16:57:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:05,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:05,783 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_434) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)))) is different from false [2022-07-21 16:57:05,788 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:05,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:57:05,794 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:05,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-21 16:57:05,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:05,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:05,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526891069] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:05,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:05,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-07-21 16:57:05,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623433792] [2022-07-21 16:57:05,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:05,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 16:57:05,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 16:57:05,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=944, Unknown=1, NotChecked=62, Total=1122 [2022-07-21 16:57:05,948 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:06,372 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2022-07-21 16:57:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 16:57:06,373 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-21 16:57:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:06,373 INFO L225 Difference]: With dead ends: 191 [2022-07-21 16:57:06,373 INFO L226 Difference]: Without dead ends: 167 [2022-07-21 16:57:06,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=1734, Unknown=1, NotChecked=86, Total=2070 [2022-07-21 16:57:06,374 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:06,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 440 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 305 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-07-21 16:57:06,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-21 16:57:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2022-07-21 16:57:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 147 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2022-07-21 16:57:06,378 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 28 [2022-07-21 16:57:06,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:06,378 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2022-07-21 16:57:06,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2022-07-21 16:57:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 16:57:06,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:06,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:06,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:06,579 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,SelfDestructingSolverStorable27 [2022-07-21 16:57:06,580 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash 697237728, now seen corresponding path program 1 times [2022-07-21 16:57:06,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:06,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960839712] [2022-07-21 16:57:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:06,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:06,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:06,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960839712] [2022-07-21 16:57:06,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960839712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311423046] [2022-07-21 16:57:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:06,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:06,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:06,985 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) [2022-07-21 16:57:06,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 16:57:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:07,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 16:57:07,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:07,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:57:07,310 INFO L356 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2022-07-21 16:57:07,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 16:57:07,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:07,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:07,583 INFO L356 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2022-07-21 16:57:07,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 27 [2022-07-21 16:57:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:07,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:08,468 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2022-07-21 16:57:08,474 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 16:57:08,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-07-21 16:57:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:08,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311423046] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:08,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:08,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-07-21 16:57:08,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830948271] [2022-07-21 16:57:08,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:08,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 16:57:08,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:08,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 16:57:08,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1050, Unknown=1, NotChecked=66, Total=1260 [2022-07-21 16:57:08,662 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:10,114 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (not (< |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~length2~0#1|))) (<= |c_ULTIMATE.start_main_~length2~0#1| 1) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~length1~0#1| 3) (<= 1 |c_ULTIMATE.start_main_~n~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (exists ((|ULTIMATE.start_main_~length1~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~length1~0#1| (* (- 1) |ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (< |ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~length1~0#1| 3))) (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) is different from false [2022-07-21 16:57:10,815 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse2 (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~n~0#1| 2)) (.cse0 (= (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) (.cse3 (< 3 (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~length2~0#1|))) (.cse5 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (or .cse0 (= (select .cse1 1) 0) .cse2) (or .cse3 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (or (= (+ (- 1) |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (* |c_ULTIMATE.start_main_~n~0#1| (- 1))) 1) (< (+ |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) .cse4) .cse2) (or (and (<= |c_ULTIMATE.start_main_~length2~0#1| 1) .cse5) (not .cse2)) (or (= .cse4 |c_ULTIMATE.start_main_~length1~0#1|) (= (+ |c_ULTIMATE.start_main_~n~0#1| 1) |c_ULTIMATE.start_main_~length1~0#1|)) (or .cse0 (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) (or .cse3 .cse5) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse6 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse6 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse5))) is different from false [2022-07-21 16:57:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:11,023 INFO L93 Difference]: Finished difference Result 218 states and 237 transitions. [2022-07-21 16:57:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 16:57:11,024 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-21 16:57:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:11,025 INFO L225 Difference]: With dead ends: 218 [2022-07-21 16:57:11,025 INFO L226 Difference]: Without dead ends: 208 [2022-07-21 16:57:11,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=282, Invalid=1707, Unknown=3, NotChecked=264, Total=2256 [2022-07-21 16:57:11,026 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 186 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:11,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 565 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 370 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-07-21 16:57:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-21 16:57:11,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2022-07-21 16:57:11,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 151 states have (on average 1.1523178807947019) internal successors, (174), 154 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:11,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2022-07-21 16:57:11,028 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 28 [2022-07-21 16:57:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:11,029 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2022-07-21 16:57:11,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2022-07-21 16:57:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 16:57:11,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:11,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:11,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:11,230 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,SelfDestructingSolverStorable28 [2022-07-21 16:57:11,230 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:11,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:11,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1853207525, now seen corresponding path program 5 times [2022-07-21 16:57:11,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:11,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340106337] [2022-07-21 16:57:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:11,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:11,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:11,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340106337] [2022-07-21 16:57:11,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340106337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:11,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380103920] [2022-07-21 16:57:11,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:57:11,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:11,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:11,364 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) [2022-07-21 16:57:11,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 16:57:11,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 16:57:11,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:11,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 16:57:11,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:11,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:11,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-07-21 16:57:11,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:11,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:11,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380103920] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:11,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:11,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-07-21 16:57:11,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130375756] [2022-07-21 16:57:11,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:11,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 16:57:11,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 16:57:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:57:11,813 INFO L87 Difference]: Start difference. First operand 155 states and 174 transitions. Second operand has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:12,168 INFO L93 Difference]: Finished difference Result 229 states and 253 transitions. [2022-07-21 16:57:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 16:57:12,169 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-21 16:57:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:12,170 INFO L225 Difference]: With dead ends: 229 [2022-07-21 16:57:12,170 INFO L226 Difference]: Without dead ends: 222 [2022-07-21 16:57:12,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:57:12,171 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 202 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:12,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 482 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:57:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-21 16:57:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 175. [2022-07-21 16:57:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.1461988304093567) internal successors, (196), 174 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2022-07-21 16:57:12,173 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 32 [2022-07-21 16:57:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:12,173 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2022-07-21 16:57:12,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2022-07-21 16:57:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 16:57:12,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:12,174 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:12,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:12,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:12,374 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:12,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1478995618, now seen corresponding path program 6 times [2022-07-21 16:57:12,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:12,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058691810] [2022-07-21 16:57:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:12,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:12,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058691810] [2022-07-21 16:57:12,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058691810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468959199] [2022-07-21 16:57:12,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:57:12,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:12,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:12,791 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) [2022-07-21 16:57:12,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 16:57:12,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 16:57:12,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:12,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 16:57:12,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:13,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:13,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:13,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-21 16:57:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:13,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:13,402 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 16:57:13,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2022-07-21 16:57:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:13,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:15,565 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-07-21 16:57:15,582 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 16:57:15,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-07-21 16:57:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:15,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468959199] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:15,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:15,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 47 [2022-07-21 16:57:15,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590427756] [2022-07-21 16:57:15,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:15,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 16:57:15,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:15,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 16:57:15,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1900, Unknown=1, NotChecked=88, Total=2162 [2022-07-21 16:57:15,871 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:17,306 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) (.cse1 (+ (- 1) |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (* |c_ULTIMATE.start_main_~n~0#1| (- 1)))) (.cse2 (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (or (= .cse0 .cse1) .cse2) (= |c_ULTIMATE.start_main_~n~0#1| 1) (< 3 |c_ULTIMATE.start_main_~length1~0#1|) (<= |c_ULTIMATE.start_main_~length1~0#1| 4) (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) .cse0) 0) .cse2) (or (and (or (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1| 1)) (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (or (<= |c_ULTIMATE.start_main_~n~0#1| 1) (not (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1|)))) (or (and (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 2)) (not (= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) .cse1)))) .cse2) (= |c_ULTIMATE.start_main_~length2~0#1| 1) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (or (not .cse2) (<= (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) 1)) (exists ((|ULTIMATE.start_main_~length1~0#1| Int)) (and (<= |ULTIMATE.start_main_~length1~0#1| 4) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |ULTIMATE.start_main_~length1~0#1| (- 2) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (< 3 |ULTIMATE.start_main_~length1~0#1|))) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse3 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse3 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))))) is different from false [2022-07-21 16:57:18,276 WARN L833 $PredicateComparison]: unable to prove that (and (or (= (+ |c_ULTIMATE.start_main_~n~0#1| 3) |c_ULTIMATE.start_main_~length1~0#1|) (= (+ |c_ULTIMATE.start_main_~n~0#1| 1) |c_ULTIMATE.start_main_~length1~0#1|)) (<= |c_ULTIMATE.start_main_~n~0#1| 3) (or (<= 3 |c_ULTIMATE.start_main_~n~0#1|) (<= |c_ULTIMATE.start_main_~n~0#1| 1)) (<= 1 |c_ULTIMATE.start_main_~n~0#1|) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))))) is different from false [2022-07-21 16:57:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:18,456 INFO L93 Difference]: Finished difference Result 247 states and 267 transitions. [2022-07-21 16:57:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 16:57:18,456 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-21 16:57:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:18,457 INFO L225 Difference]: With dead ends: 247 [2022-07-21 16:57:18,457 INFO L226 Difference]: Without dead ends: 220 [2022-07-21 16:57:18,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=379, Invalid=3662, Unknown=3, NotChecked=378, Total=4422 [2022-07-21 16:57:18,462 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:18,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1124 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 769 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2022-07-21 16:57:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-21 16:57:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2022-07-21 16:57:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 183 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 205 transitions. [2022-07-21 16:57:18,479 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 205 transitions. Word has length 34 [2022-07-21 16:57:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:18,480 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 205 transitions. [2022-07-21 16:57:18,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 205 transitions. [2022-07-21 16:57:18,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 16:57:18,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:18,480 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:18,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:18,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:18,696 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1456363364, now seen corresponding path program 2 times [2022-07-21 16:57:18,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:18,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939827953] [2022-07-21 16:57:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:18,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:19,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:19,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939827953] [2022-07-21 16:57:19,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939827953] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:19,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866532737] [2022-07-21 16:57:19,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:57:19,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:19,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:19,298 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) [2022-07-21 16:57:19,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 16:57:19,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:57:19,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:19,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 16:57:19,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:19,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:57:19,724 INFO L356 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2022-07-21 16:57:19,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 16:57:20,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:20,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:20,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:20,154 INFO L356 Elim1Store]: treesize reduction 47, result has 29.9 percent of original size [2022-07-21 16:57:20,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 37 [2022-07-21 16:57:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:20,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:20,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-07-21 16:57:20,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:20,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:20,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:20,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 78 [2022-07-21 16:57:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:20,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866532737] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:20,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:20,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 44 [2022-07-21 16:57:20,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863740621] [2022-07-21 16:57:20,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:20,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 16:57:20,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 16:57:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 16:57:20,697 INFO L87 Difference]: Start difference. First operand 184 states and 205 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:25,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:25,417 INFO L93 Difference]: Finished difference Result 307 states and 333 transitions. [2022-07-21 16:57:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 16:57:25,418 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-21 16:57:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:25,419 INFO L225 Difference]: With dead ends: 307 [2022-07-21 16:57:25,419 INFO L226 Difference]: Without dead ends: 295 [2022-07-21 16:57:25,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=832, Invalid=4277, Unknown=3, NotChecked=0, Total=5112 [2022-07-21 16:57:25,420 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 356 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:25,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 583 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 736 Invalid, 0 Unknown, 139 Unchecked, 0.4s Time] [2022-07-21 16:57:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-21 16:57:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 198. [2022-07-21 16:57:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.1443298969072164) internal successors, (222), 197 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 222 transitions. [2022-07-21 16:57:25,423 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 222 transitions. Word has length 34 [2022-07-21 16:57:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:25,423 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 222 transitions. [2022-07-21 16:57:25,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 222 transitions. [2022-07-21 16:57:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 16:57:25,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:25,424 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 16:57:25,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:25,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:25,641 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:25,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:25,642 INFO L85 PathProgramCache]: Analyzing trace with hash 423361944, now seen corresponding path program 2 times [2022-07-21 16:57:25,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:25,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377322630] [2022-07-21 16:57:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:25,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:57:25,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:25,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377322630] [2022-07-21 16:57:25,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377322630] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:25,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361747741] [2022-07-21 16:57:25,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:57:25,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:25,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:25,747 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) [2022-07-21 16:57:25,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 16:57:25,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:57:25,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 16:57:25,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:25,856 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:25,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:57:25,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:57:26,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361747741] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:26,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:26,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-07-21 16:57:26,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234807954] [2022-07-21 16:57:26,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:26,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 16:57:26,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:26,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 16:57:26,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:57:26,013 INFO L87 Difference]: Start difference. First operand 198 states and 222 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:26,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:26,174 INFO L93 Difference]: Finished difference Result 291 states and 322 transitions. [2022-07-21 16:57:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:57:26,175 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-21 16:57:26,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:26,175 INFO L225 Difference]: With dead ends: 291 [2022-07-21 16:57:26,175 INFO L226 Difference]: Without dead ends: 251 [2022-07-21 16:57:26,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2022-07-21 16:57:26,176 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 175 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:26,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 241 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:57:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-21 16:57:26,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 200. [2022-07-21 16:57:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.1428571428571428) internal successors, (224), 199 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 224 transitions. [2022-07-21 16:57:26,179 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 224 transitions. Word has length 37 [2022-07-21 16:57:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:26,180 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 224 transitions. [2022-07-21 16:57:26,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 224 transitions. [2022-07-21 16:57:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 16:57:26,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:26,180 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:26,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:26,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:26,398 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:26,398 INFO L85 PathProgramCache]: Analyzing trace with hash 763708385, now seen corresponding path program 7 times [2022-07-21 16:57:26,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:26,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996337999] [2022-07-21 16:57:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:26,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:26,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:26,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996337999] [2022-07-21 16:57:26,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996337999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:26,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919143189] [2022-07-21 16:57:26,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:57:26,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:26,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:26,536 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) [2022-07-21 16:57:26,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 16:57:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 16:57:26,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:26,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-07-21 16:57:26,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:26,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:27,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919143189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:27,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:27,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2022-07-21 16:57:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667591620] [2022-07-21 16:57:27,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:27,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 16:57:27,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 16:57:27,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 16:57:27,146 INFO L87 Difference]: Start difference. First operand 200 states and 224 transitions. Second operand has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:27,716 INFO L93 Difference]: Finished difference Result 326 states and 357 transitions. [2022-07-21 16:57:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 16:57:27,716 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-21 16:57:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:27,717 INFO L225 Difference]: With dead ends: 326 [2022-07-21 16:57:27,717 INFO L226 Difference]: Without dead ends: 319 [2022-07-21 16:57:27,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1975, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 16:57:27,718 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 512 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:27,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 792 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:57:27,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-21 16:57:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 220. [2022-07-21 16:57:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 216 states have (on average 1.1388888888888888) internal successors, (246), 219 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 246 transitions. [2022-07-21 16:57:27,740 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 246 transitions. Word has length 38 [2022-07-21 16:57:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:27,740 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 246 transitions. [2022-07-21 16:57:27,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 246 transitions. [2022-07-21 16:57:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 16:57:27,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:27,741 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:27,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-21 16:57:27,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:27,945 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash -515648934, now seen corresponding path program 8 times [2022-07-21 16:57:27,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:27,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771950918] [2022-07-21 16:57:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:27,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:28,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771950918] [2022-07-21 16:57:28,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771950918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659119275] [2022-07-21 16:57:28,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:57:28,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:28,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:28,204 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) [2022-07-21 16:57:28,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 16:57:28,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:57:28,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:28,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 16:57:28,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:28,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:28,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:57:28,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:57:28,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:57:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:28,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:28,713 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_677) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:57:28,717 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:28,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:57:28,721 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:28,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-21 16:57:28,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:28,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:28,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659119275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:28,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:28,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 39 [2022-07-21 16:57:28,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967090298] [2022-07-21 16:57:28,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:28,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 16:57:28,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:28,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 16:57:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1278, Unknown=1, NotChecked=72, Total=1482 [2022-07-21 16:57:28,959 INFO L87 Difference]: Start difference. First operand 220 states and 246 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:29,512 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2022-07-21 16:57:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 16:57:29,512 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-21 16:57:29,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:29,513 INFO L225 Difference]: With dead ends: 289 [2022-07-21 16:57:29,513 INFO L226 Difference]: Without dead ends: 258 [2022-07-21 16:57:29,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=2033, Unknown=1, NotChecked=92, Total=2352 [2022-07-21 16:57:29,514 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 88 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:29,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 656 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 559 Invalid, 0 Unknown, 146 Unchecked, 0.2s Time] [2022-07-21 16:57:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-21 16:57:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 229. [2022-07-21 16:57:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 225 states have (on average 1.1333333333333333) internal successors, (255), 228 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 255 transitions. [2022-07-21 16:57:29,518 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 255 transitions. Word has length 40 [2022-07-21 16:57:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:29,518 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 255 transitions. [2022-07-21 16:57:29,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 255 transitions. [2022-07-21 16:57:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 16:57:29,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:29,519 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:29,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:29,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:29,727 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:29,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:29,728 INFO L85 PathProgramCache]: Analyzing trace with hash -910015720, now seen corresponding path program 3 times [2022-07-21 16:57:29,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:29,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015020716] [2022-07-21 16:57:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:29,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:30,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:30,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015020716] [2022-07-21 16:57:30,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015020716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:30,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539103831] [2022-07-21 16:57:30,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:57:30,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:30,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:30,153 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) [2022-07-21 16:57:30,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 16:57:30,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 16:57:30,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-21 16:57:30,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:30,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:30,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:57:30,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:57:31,223 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:31,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 39 treesize of output 19 [2022-07-21 16:57:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:31,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:31,368 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_716 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_716) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= 0 (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-07-21 16:57:31,373 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:31,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 61 [2022-07-21 16:57:31,405 INFO L356 Elim1Store]: treesize reduction 88, result has 31.8 percent of original size [2022-07-21 16:57:31,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 119 [2022-07-21 16:57:31,413 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-21 16:57:31,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 29 [2022-07-21 16:57:31,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:31,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539103831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:31,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:31,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 47 [2022-07-21 16:57:31,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245586518] [2022-07-21 16:57:31,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:31,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 16:57:31,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:31,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 16:57:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1865, Unknown=2, NotChecked=88, Total=2162 [2022-07-21 16:57:31,951 INFO L87 Difference]: Start difference. First operand 229 states and 255 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:33,801 INFO L93 Difference]: Finished difference Result 334 states and 366 transitions. [2022-07-21 16:57:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 16:57:33,802 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-21 16:57:33,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:33,804 INFO L225 Difference]: With dead ends: 334 [2022-07-21 16:57:33,804 INFO L226 Difference]: Without dead ends: 308 [2022-07-21 16:57:33,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=481, Invalid=3553, Unknown=2, NotChecked=124, Total=4160 [2022-07-21 16:57:33,805 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 258 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:33,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 508 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 874 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-07-21 16:57:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-21 16:57:33,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 244. [2022-07-21 16:57:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 240 states have (on average 1.1375) internal successors, (273), 243 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 273 transitions. [2022-07-21 16:57:33,826 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 273 transitions. Word has length 40 [2022-07-21 16:57:33,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:33,826 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 273 transitions. [2022-07-21 16:57:33,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 273 transitions. [2022-07-21 16:57:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 16:57:33,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:33,827 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 16:57:33,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:34,044 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,SelfDestructingSolverStorable35 [2022-07-21 16:57:34,044 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2063863029, now seen corresponding path program 1 times [2022-07-21 16:57:34,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:34,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982262674] [2022-07-21 16:57:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:34,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:57:34,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:34,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982262674] [2022-07-21 16:57:34,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982262674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:34,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761289518] [2022-07-21 16:57:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:34,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:34,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:34,179 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) [2022-07-21 16:57:34,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 16:57:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:34,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 16:57:34,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:34,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:34,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:34,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:57:34,553 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 16:57:34,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-21 16:57:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:34,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:34,593 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-07-21 16:57:34,596 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_758 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)))) is different from false [2022-07-21 16:57:34,602 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ |c_ULTIMATE.start_cstrncat_~src#1.offset| 1)) 0)) is different from false [2022-07-21 16:57:34,605 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-07-21 16:57:34,608 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:34,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:57:34,611 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:34,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:57:34,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:34,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-21 16:57:34,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761289518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:34,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:34,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 36 [2022-07-21 16:57:34,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346031369] [2022-07-21 16:57:34,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:34,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 16:57:34,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 16:57:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=883, Unknown=4, NotChecked=252, Total=1260 [2022-07-21 16:57:34,779 INFO L87 Difference]: Start difference. First operand 244 states and 273 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:35,660 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2022-07-21 16:57:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 16:57:35,660 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-21 16:57:35,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:35,661 INFO L225 Difference]: With dead ends: 295 [2022-07-21 16:57:35,661 INFO L226 Difference]: Without dead ends: 289 [2022-07-21 16:57:35,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=667, Invalid=3767, Unknown=4, NotChecked=532, Total=4970 [2022-07-21 16:57:35,663 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 461 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:35,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 410 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 346 Invalid, 0 Unknown, 461 Unchecked, 0.2s Time] [2022-07-21 16:57:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-21 16:57:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 246. [2022-07-21 16:57:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 242 states have (on average 1.1363636363636365) internal successors, (275), 245 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 275 transitions. [2022-07-21 16:57:35,666 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 275 transitions. Word has length 41 [2022-07-21 16:57:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:35,666 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 275 transitions. [2022-07-21 16:57:35,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 275 transitions. [2022-07-21 16:57:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 16:57:35,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:35,666 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 16:57:35,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-21 16:57:35,875 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,SelfDestructingSolverStorable36 [2022-07-21 16:57:35,875 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:35,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1091941255, now seen corresponding path program 1 times [2022-07-21 16:57:35,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:35,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54137682] [2022-07-21 16:57:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:35,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:57:36,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:36,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54137682] [2022-07-21 16:57:36,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54137682] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:36,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792501992] [2022-07-21 16:57:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:36,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:36,032 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) [2022-07-21 16:57:36,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 16:57:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 16:57:36,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:36,151 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:36,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:36,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:36,444 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:36,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-21 16:57:36,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-07-21 16:57:36,609 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 16:57:36,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-07-21 16:57:36,648 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:57:36,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 16:57:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:36,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:36,964 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:36,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:57:36,969 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:36,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:57:36,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:37,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-07-21 16:57:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:37,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792501992] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:37,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:37,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 46 [2022-07-21 16:57:37,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809972618] [2022-07-21 16:57:37,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:37,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 16:57:37,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 16:57:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1890, Unknown=14, NotChecked=0, Total=2070 [2022-07-21 16:57:37,435 INFO L87 Difference]: Start difference. First operand 246 states and 275 transitions. Second operand has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:38,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:38,220 INFO L93 Difference]: Finished difference Result 328 states and 359 transitions. [2022-07-21 16:57:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 16:57:38,221 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-21 16:57:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:38,221 INFO L225 Difference]: With dead ends: 328 [2022-07-21 16:57:38,222 INFO L226 Difference]: Without dead ends: 304 [2022-07-21 16:57:38,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=417, Invalid=4399, Unknown=14, NotChecked=0, Total=4830 [2022-07-21 16:57:38,226 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 175 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:38,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 378 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 252 Invalid, 0 Unknown, 337 Unchecked, 0.1s Time] [2022-07-21 16:57:38,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-21 16:57:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2022-07-21 16:57:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.1391304347826088) internal successors, (262), 233 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 262 transitions. [2022-07-21 16:57:38,231 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 262 transitions. Word has length 42 [2022-07-21 16:57:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:38,231 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 262 transitions. [2022-07-21 16:57:38,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 262 transitions. [2022-07-21 16:57:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 16:57:38,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:38,232 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:38,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:38,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 16:57:38,449 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash 734238365, now seen corresponding path program 9 times [2022-07-21 16:57:38,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:38,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444877617] [2022-07-21 16:57:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:38,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:38,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444877617] [2022-07-21 16:57:38,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444877617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206350871] [2022-07-21 16:57:38,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:57:38,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:38,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:38,584 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) [2022-07-21 16:57:38,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 16:57:38,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 16:57:38,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 16:57:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:38,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-07-21 16:57:38,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:39,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:39,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206350871] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:39,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:39,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2022-07-21 16:57:39,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732296580] [2022-07-21 16:57:39,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:39,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 16:57:39,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 16:57:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 16:57:39,411 INFO L87 Difference]: Start difference. First operand 234 states and 262 transitions. Second operand has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:40,054 INFO L93 Difference]: Finished difference Result 391 states and 428 transitions. [2022-07-21 16:57:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 16:57:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-21 16:57:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:40,055 INFO L225 Difference]: With dead ends: 391 [2022-07-21 16:57:40,055 INFO L226 Difference]: Without dead ends: 384 [2022-07-21 16:57:40,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=614, Invalid=2466, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 16:57:40,056 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 722 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:40,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 555 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:57:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-21 16:57:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 254. [2022-07-21 16:57:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.136) internal successors, (284), 253 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 284 transitions. [2022-07-21 16:57:40,059 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 284 transitions. Word has length 44 [2022-07-21 16:57:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:40,059 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 284 transitions. [2022-07-21 16:57:40,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:40,060 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 284 transitions. [2022-07-21 16:57:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 16:57:40,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:40,060 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:40,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:40,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:40,278 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:40,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1097682670, now seen corresponding path program 2 times [2022-07-21 16:57:40,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:40,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505017030] [2022-07-21 16:57:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:40,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:40,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:40,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505017030] [2022-07-21 16:57:40,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505017030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:40,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258318460] [2022-07-21 16:57:40,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:57:40,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:40,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:40,444 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) [2022-07-21 16:57:40,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 16:57:40,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:57:40,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:40,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 16:57:40,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:40,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:40,789 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-21 16:57:40,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 42 [2022-07-21 16:57:40,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:40,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:40,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-07-21 16:57:40,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:40,952 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:40,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2022-07-21 16:57:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:57:40,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:41,012 WARN L833 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_cstrncat_#t~mem6#1| 0) (forall ((v_ArrVal_888 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0))) is different from false [2022-07-21 16:57:41,015 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_#t~post5#1.base|) |c_ULTIMATE.start_cstrncat_#t~post5#1.offset|) 0) (forall ((v_ArrVal_888 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0))) is different from false [2022-07-21 16:57:41,019 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_888 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-07-21 16:57:41,046 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0) (forall ((v_ArrVal_888 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)))) is different from false [2022-07-21 16:57:41,051 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) |c_ULTIMATE.start_cstrncat_~src#1.offset|) 0) (forall ((v_ArrVal_888 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ |c_ULTIMATE.start_cstrncat_~src#1.offset| 1)) 0) (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~dst#1.offset|) 0))))) is different from false [2022-07-21 16:57:41,057 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_888 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) is different from false [2022-07-21 16:57:41,073 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-21 16:57:41,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 69 treesize of output 85 [2022-07-21 16:57:41,080 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:41,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 51 [2022-07-21 16:57:41,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:41,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:41,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-07-21 16:57:41,125 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:41,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2022-07-21 16:57:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 3 not checked. [2022-07-21 16:57:41,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258318460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:41,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:41,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 46 [2022-07-21 16:57:41,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115660900] [2022-07-21 16:57:41,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:41,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 16:57:41,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:41,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 16:57:41,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1431, Unknown=6, NotChecked=486, Total=2070 [2022-07-21 16:57:41,325 INFO L87 Difference]: Start difference. First operand 254 states and 284 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:42,507 WARN L833 $PredicateComparison]: unable to prove that (and (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) |c_ULTIMATE.start_cstrncat_~src#1.offset|) 0) (forall ((v_ArrVal_888 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ |c_ULTIMATE.start_cstrncat_~src#1.offset| 1)) 0) (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~dst#1.offset|) 0))))) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ (- 1) |ULTIMATE.start_main_~length2~0#1|)) 0) (< 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2))) (= |c_ULTIMATE.start_cstrncat_~dst#1.offset| 0) (= |c_ULTIMATE.start_cstrncat_~src#1.offset| 0)) is different from false [2022-07-21 16:57:42,581 WARN L833 $PredicateComparison]: unable to prove that (and (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0) (forall ((v_ArrVal_888 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)))) (= |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |c_ULTIMATE.start_cstrncat_~d~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~length2~0#1|)) 0) (< 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2)))) is different from false [2022-07-21 16:57:42,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:42,881 INFO L93 Difference]: Finished difference Result 390 states and 426 transitions. [2022-07-21 16:57:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-21 16:57:42,881 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-21 16:57:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:42,882 INFO L225 Difference]: With dead ends: 390 [2022-07-21 16:57:42,882 INFO L226 Difference]: Without dead ends: 348 [2022-07-21 16:57:42,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1097, Invalid=9638, Unknown=9, NotChecked=1688, Total=12432 [2022-07-21 16:57:42,883 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 397 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:42,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 413 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 375 Invalid, 0 Unknown, 768 Unchecked, 0.1s Time] [2022-07-21 16:57:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-21 16:57:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 276. [2022-07-21 16:57:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 272 states have (on average 1.1323529411764706) internal successors, (308), 275 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 308 transitions. [2022-07-21 16:57:42,886 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 308 transitions. Word has length 45 [2022-07-21 16:57:42,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:42,886 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 308 transitions. [2022-07-21 16:57:42,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:42,886 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 308 transitions. [2022-07-21 16:57:42,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 16:57:42,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:42,889 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:42,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:43,112 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,SelfDestructingSolverStorable39 [2022-07-21 16:57:43,112 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1228432918, now seen corresponding path program 10 times [2022-07-21 16:57:43,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:43,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545368915] [2022-07-21 16:57:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:43,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:43,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:43,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545368915] [2022-07-21 16:57:43,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545368915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:43,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110531663] [2022-07-21 16:57:43,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:57:43,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:43,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:43,419 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:43,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 16:57:43,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:57:43,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:43,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 16:57:43,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:43,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:43,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:57:43,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:57:44,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:57:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:44,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:44,079 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_931 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_931) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:57:44,083 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:44,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:57:44,088 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:44,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-21 16:57:44,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:44,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:44,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110531663] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:44,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:44,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 43 [2022-07-21 16:57:44,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696595823] [2022-07-21 16:57:44,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:44,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 16:57:44,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:44,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 16:57:44,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1581, Unknown=1, NotChecked=80, Total=1806 [2022-07-21 16:57:44,361 INFO L87 Difference]: Start difference. First operand 276 states and 308 transitions. Second operand has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:45,232 INFO L93 Difference]: Finished difference Result 392 states and 427 transitions. [2022-07-21 16:57:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 16:57:45,232 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-21 16:57:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:45,233 INFO L225 Difference]: With dead ends: 392 [2022-07-21 16:57:45,233 INFO L226 Difference]: Without dead ends: 357 [2022-07-21 16:57:45,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=371, Invalid=3054, Unknown=1, NotChecked=114, Total=3540 [2022-07-21 16:57:45,235 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 165 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:45,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 978 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 745 Invalid, 0 Unknown, 239 Unchecked, 0.3s Time] [2022-07-21 16:57:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-07-21 16:57:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 285. [2022-07-21 16:57:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 281 states have (on average 1.1281138790035588) internal successors, (317), 284 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 317 transitions. [2022-07-21 16:57:45,258 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 317 transitions. Word has length 46 [2022-07-21 16:57:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:45,258 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 317 transitions. [2022-07-21 16:57:45,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 317 transitions. [2022-07-21 16:57:45,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 16:57:45,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:45,260 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:45,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:45,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-21 16:57:45,480 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1476579412, now seen corresponding path program 4 times [2022-07-21 16:57:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:45,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545919009] [2022-07-21 16:57:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:46,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545919009] [2022-07-21 16:57:46,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545919009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:46,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437294533] [2022-07-21 16:57:46,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:57:46,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:46,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:46,107 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:46,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 16:57:46,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:57:46,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-21 16:57:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:46,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:46,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:57:46,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:57:46,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:57:46,826 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:46,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 23 [2022-07-21 16:57:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:46,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:46,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-07-21 16:57:47,060 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:47,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 73 [2022-07-21 16:57:47,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,075 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:47,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 176 [2022-07-21 16:57:47,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:47,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 36 [2022-07-21 16:57:47,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:48,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437294533] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:48,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:48,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 57 [2022-07-21 16:57:48,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244459944] [2022-07-21 16:57:48,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:48,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 16:57:48,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 16:57:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2917, Unknown=1, NotChecked=0, Total=3192 [2022-07-21 16:57:48,073 INFO L87 Difference]: Start difference. First operand 285 states and 317 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:50,189 INFO L93 Difference]: Finished difference Result 416 states and 456 transitions. [2022-07-21 16:57:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 16:57:50,190 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-21 16:57:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:50,193 INFO L225 Difference]: With dead ends: 416 [2022-07-21 16:57:50,193 INFO L226 Difference]: Without dead ends: 386 [2022-07-21 16:57:50,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=785, Invalid=7404, Unknown=1, NotChecked=0, Total=8190 [2022-07-21 16:57:50,197 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 279 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:50,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 647 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1137 Invalid, 0 Unknown, 106 Unchecked, 0.5s Time] [2022-07-21 16:57:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-21 16:57:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 310. [2022-07-21 16:57:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.130718954248366) internal successors, (346), 309 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 346 transitions. [2022-07-21 16:57:50,217 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 346 transitions. Word has length 46 [2022-07-21 16:57:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:50,217 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 346 transitions. [2022-07-21 16:57:50,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 346 transitions. [2022-07-21 16:57:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 16:57:50,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:50,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:50,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:50,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-21 16:57:50,419 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1193977735, now seen corresponding path program 1 times [2022-07-21 16:57:50,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:50,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679341127] [2022-07-21 16:57:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:50,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:57:50,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:50,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679341127] [2022-07-21 16:57:50,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679341127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:50,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728453696] [2022-07-21 16:57:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:50,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:50,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:50,586 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:50,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 16:57:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:50,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 16:57:50,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:50,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:50,953 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:50,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-21 16:57:50,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-07-21 16:57:51,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:51,154 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:51,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2022-07-21 16:57:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:57:51,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:51,476 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:51,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:57:51,479 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:51,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:57:51,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:51,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:57:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:57:51,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728453696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:51,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:51,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 51 [2022-07-21 16:57:51,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129725984] [2022-07-21 16:57:51,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:51,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 16:57:51,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:51,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 16:57:51,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2372, Unknown=2, NotChecked=0, Total=2550 [2022-07-21 16:57:51,737 INFO L87 Difference]: Start difference. First operand 310 states and 346 transitions. Second operand has 51 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:53,325 INFO L93 Difference]: Finished difference Result 579 states and 633 transitions. [2022-07-21 16:57:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-21 16:57:53,326 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-21 16:57:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:53,328 INFO L225 Difference]: With dead ends: 579 [2022-07-21 16:57:53,328 INFO L226 Difference]: Without dead ends: 555 [2022-07-21 16:57:53,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2461 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=971, Invalid=8729, Unknown=2, NotChecked=0, Total=9702 [2022-07-21 16:57:53,329 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 549 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:53,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 419 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 601 Invalid, 0 Unknown, 589 Unchecked, 0.2s Time] [2022-07-21 16:57:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-07-21 16:57:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 372. [2022-07-21 16:57:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 368 states have (on average 1.138586956521739) internal successors, (419), 371 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 419 transitions. [2022-07-21 16:57:53,336 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 419 transitions. Word has length 47 [2022-07-21 16:57:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:53,336 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 419 transitions. [2022-07-21 16:57:53,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 419 transitions. [2022-07-21 16:57:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 16:57:53,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:53,337 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-21 16:57:53,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:53,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:53,551 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:53,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash 994210165, now seen corresponding path program 2 times [2022-07-21 16:57:53,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:53,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165268077] [2022-07-21 16:57:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:53,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 16:57:53,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:53,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165268077] [2022-07-21 16:57:53,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165268077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:53,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484019972] [2022-07-21 16:57:53,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:57:53,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:53,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:53,726 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:53,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 16:57:53,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:57:53,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:53,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 16:57:53,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:53,864 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:53,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:53,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:53,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 16:57:54,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:54,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:54,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 16:57:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 16:57:54,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:54,486 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:54,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-21 16:57:54,490 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:54,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 16:57:54,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:57:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 16:57:54,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484019972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:54,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:54,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2022-07-21 16:57:54,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031027397] [2022-07-21 16:57:54,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:54,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 16:57:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:54,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 16:57:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1174, Unknown=36, NotChecked=0, Total=1332 [2022-07-21 16:57:54,767 INFO L87 Difference]: Start difference. First operand 372 states and 419 transitions. Second operand has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:55,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:55,259 INFO L93 Difference]: Finished difference Result 482 states and 529 transitions. [2022-07-21 16:57:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 16:57:55,260 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-21 16:57:55,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:55,261 INFO L225 Difference]: With dead ends: 482 [2022-07-21 16:57:55,261 INFO L226 Difference]: Without dead ends: 402 [2022-07-21 16:57:55,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=316, Invalid=2297, Unknown=39, NotChecked=0, Total=2652 [2022-07-21 16:57:55,261 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:55,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 422 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 0 Unknown, 177 Unchecked, 0.1s Time] [2022-07-21 16:57:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-21 16:57:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 332. [2022-07-21 16:57:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 328 states have (on average 1.125) internal successors, (369), 331 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 369 transitions. [2022-07-21 16:57:55,265 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 369 transitions. Word has length 48 [2022-07-21 16:57:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:55,265 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 369 transitions. [2022-07-21 16:57:55,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 369 transitions. [2022-07-21 16:57:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 16:57:55,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:55,265 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:55,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:55,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:55,466 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:55,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1776899047, now seen corresponding path program 11 times [2022-07-21 16:57:55,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:55,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040756062] [2022-07-21 16:57:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:55,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:55,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:55,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040756062] [2022-07-21 16:57:55,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040756062] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:55,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009938795] [2022-07-21 16:57:55,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:57:55,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:55,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:55,637 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:55,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 16:57:55,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 16:57:55,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:55,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 16:57:55,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:55,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:55,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-07-21 16:57:55,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:56,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 66 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:56,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009938795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:56,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:56,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-07-21 16:57:56,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842860969] [2022-07-21 16:57:56,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:56,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 16:57:56,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:56,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 16:57:56,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 16:57:56,518 INFO L87 Difference]: Start difference. First operand 332 states and 369 transitions. Second operand has 44 states, 43 states have (on average 3.0) internal successors, (129), 44 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:57,361 INFO L93 Difference]: Finished difference Result 544 states and 593 transitions. [2022-07-21 16:57:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 16:57:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.0) internal successors, (129), 44 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-21 16:57:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:57,362 INFO L225 Difference]: With dead ends: 544 [2022-07-21 16:57:57,362 INFO L226 Difference]: Without dead ends: 528 [2022-07-21 16:57:57,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=687, Invalid=2735, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 16:57:57,363 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 508 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:57,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1016 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 16:57:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-07-21 16:57:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 354. [2022-07-21 16:57:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 350 states have (on average 1.1228571428571428) internal successors, (393), 353 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 393 transitions. [2022-07-21 16:57:57,366 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 393 transitions. Word has length 50 [2022-07-21 16:57:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:57,367 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 393 transitions. [2022-07-21 16:57:57,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.0) internal successors, (129), 44 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 393 transitions. [2022-07-21 16:57:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:57:57,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:57,367 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:57,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:57,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:57,575 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:57:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:57,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1797000338, now seen corresponding path program 12 times [2022-07-21 16:57:57,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:57,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513717787] [2022-07-21 16:57:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:57,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:57,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:57,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513717787] [2022-07-21 16:57:57,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513717787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:57,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276196814] [2022-07-21 16:57:57,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:57:57,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:57,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:57,881 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:57,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 16:57:58,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-21 16:57:58,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:58,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-21 16:57:58,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:58,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:58,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:58,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-21 16:57:58,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:58,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:58,855 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 16:57:58,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2022-07-21 16:57:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:58,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:00,964 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-07-21 16:58:00,969 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 16:58:00,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-07-21 16:58:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:01,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276196814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:01,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:01,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 23] total 57 [2022-07-21 16:58:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440244146] [2022-07-21 16:58:01,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:01,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 16:58:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 16:58:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2864, Unknown=1, NotChecked=108, Total=3192 [2022-07-21 16:58:01,412 INFO L87 Difference]: Start difference. First operand 354 states and 393 transitions. Second operand has 57 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 57 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:03,376 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) (.cse0 (+ (- 1) |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (* |c_ULTIMATE.start_main_~n~0#1| (- 1))))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |c_ULTIMATE.start_main_~length1~0#1| 7) (or (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1| 1)) (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (= |c_ULTIMATE.start_main_~n~0#1| 1) (or (<= |c_ULTIMATE.start_main_~n~0#1| 1) (not (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1|)))) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= .cse0 .cse1) (= |c_ULTIMATE.start_main_~length2~0#1| 1) (< 6 |c_ULTIMATE.start_main_~length1~0#1|) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) .cse1) 0) (or (and (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) (not (= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) .cse0))) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse2 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse2 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) (exists ((|ULTIMATE.start_main_~length1~0#1| Int)) (and (<= |ULTIMATE.start_main_~length1~0#1| 7) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |ULTIMATE.start_main_~length1~0#1| (- 2) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (< 6 |ULTIMATE.start_main_~length1~0#1|))) (<= |c_ULTIMATE.start_main_~i~0#1| 6))) is different from false [2022-07-21 16:58:05,397 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (<= |c_ULTIMATE.start_main_~n~0#1| 1)) (.cse3 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) (.cse0 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (.cse2 (+ (- 1) |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (* |c_ULTIMATE.start_main_~n~0#1| (- 1))))) (and (or (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1| 1)) .cse0) .cse1 (or .cse1 (not (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1|)))) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= .cse2 .cse3) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) .cse3) 0) .cse0 (or (and (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) (not (= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) .cse2))) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse4 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse4 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))))) is different from false [2022-07-21 16:58:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:05,582 INFO L93 Difference]: Finished difference Result 484 states and 524 transitions. [2022-07-21 16:58:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-21 16:58:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 57 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-21 16:58:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:05,584 INFO L225 Difference]: With dead ends: 484 [2022-07-21 16:58:05,584 INFO L226 Difference]: Without dead ends: 445 [2022-07-21 16:58:05,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=548, Invalid=6267, Unknown=3, NotChecked=492, Total=7310 [2022-07-21 16:58:05,585 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 348 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:05,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1360 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 912 Invalid, 0 Unknown, 536 Unchecked, 0.4s Time] [2022-07-21 16:58:05,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-07-21 16:58:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 363. [2022-07-21 16:58:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 359 states have (on average 1.1197771587743732) internal successors, (402), 362 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 402 transitions. [2022-07-21 16:58:05,588 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 402 transitions. Word has length 52 [2022-07-21 16:58:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:05,588 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 402 transitions. [2022-07-21 16:58:05,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 57 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 402 transitions. [2022-07-21 16:58:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:58:05,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:05,589 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:05,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:05,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-21 16:58:05,806 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:05,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:05,806 INFO L85 PathProgramCache]: Analyzing trace with hash -558804912, now seen corresponding path program 5 times [2022-07-21 16:58:05,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:05,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605783803] [2022-07-21 16:58:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:05,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 38 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:06,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:06,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605783803] [2022-07-21 16:58:06,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605783803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:06,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814519453] [2022-07-21 16:58:06,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:58:06,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:06,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:06,597 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:06,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 16:58:06,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-21 16:58:06,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 16:58:06,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:06,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:07,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:58:07,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:58:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:07,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:07,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:08,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:08,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:08,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:08,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:08,025 INFO L356 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2022-07-21 16:58:08,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 60 [2022-07-21 16:58:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:08,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:08,241 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1205 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1205) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= 0 (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2022-07-21 16:58:08,251 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:08,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 85 [2022-07-21 16:58:08,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,278 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:08,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 161 treesize of output 211 [2022-07-21 16:58:08,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:08,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2022-07-21 16:58:09,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 48 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:09,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814519453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:09,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:09,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 62 [2022-07-21 16:58:09,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189787452] [2022-07-21 16:58:09,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:09,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-21 16:58:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-21 16:58:09,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3299, Unknown=1, NotChecked=118, Total=3782 [2022-07-21 16:58:09,065 INFO L87 Difference]: Start difference. First operand 363 states and 402 transitions. Second operand has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:12,414 INFO L93 Difference]: Finished difference Result 614 states and 675 transitions. [2022-07-21 16:58:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 16:58:12,415 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-21 16:58:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:12,416 INFO L225 Difference]: With dead ends: 614 [2022-07-21 16:58:12,416 INFO L226 Difference]: Without dead ends: 564 [2022-07-21 16:58:12,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1391, Invalid=7924, Unknown=1, NotChecked=190, Total=9506 [2022-07-21 16:58:12,417 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 715 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:12,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 561 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 670 Invalid, 0 Unknown, 299 Unchecked, 0.4s Time] [2022-07-21 16:58:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-07-21 16:58:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 382. [2022-07-21 16:58:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 378 states have (on average 1.1216931216931216) internal successors, (424), 381 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 424 transitions. [2022-07-21 16:58:12,420 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 424 transitions. Word has length 52 [2022-07-21 16:58:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:12,421 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 424 transitions. [2022-07-21 16:58:12,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 424 transitions. [2022-07-21 16:58:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:58:12,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:12,421 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 16:58:12,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:12,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-21 16:58:12,622 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:12,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1217377784, now seen corresponding path program 3 times [2022-07-21 16:58:12,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969876614] [2022-07-21 16:58:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:12,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:58:12,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:12,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969876614] [2022-07-21 16:58:12,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969876614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:12,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873651482] [2022-07-21 16:58:12,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:58:12,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:12,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:12,759 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:12,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 16:58:13,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:58:13,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:13,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 16:58:13,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:13,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:13,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:13,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:58:13,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 16:58:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:13,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:58:13,668 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:13,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-21 16:58:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 16:58:13,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:14,646 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:14,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-21 16:58:14,651 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:14,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 16:58:14,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:58:15,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:15,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 16:58:15,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873651482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:15,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:15,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 51 [2022-07-21 16:58:15,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554426729] [2022-07-21 16:58:15,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:15,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 16:58:15,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:15,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 16:58:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2339, Unknown=2, NotChecked=0, Total=2550 [2022-07-21 16:58:15,207 INFO L87 Difference]: Start difference. First operand 382 states and 424 transitions. Second operand has 51 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 51 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:16,732 INFO L93 Difference]: Finished difference Result 517 states and 567 transitions. [2022-07-21 16:58:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 16:58:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 51 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-21 16:58:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:16,733 INFO L225 Difference]: With dead ends: 517 [2022-07-21 16:58:16,733 INFO L226 Difference]: Without dead ends: 485 [2022-07-21 16:58:16,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=822, Invalid=7548, Unknown=2, NotChecked=0, Total=8372 [2022-07-21 16:58:16,734 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 177 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:16,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 403 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 280 Invalid, 0 Unknown, 440 Unchecked, 0.1s Time] [2022-07-21 16:58:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-07-21 16:58:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 356. [2022-07-21 16:58:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 352 states have (on average 1.125) internal successors, (396), 355 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 396 transitions. [2022-07-21 16:58:16,737 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 396 transitions. Word has length 52 [2022-07-21 16:58:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:16,738 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 396 transitions. [2022-07-21 16:58:16,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 51 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 396 transitions. [2022-07-21 16:58:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 16:58:16,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:16,738 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-07-21 16:58:16,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:16,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:16,956 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:16,956 INFO L85 PathProgramCache]: Analyzing trace with hash -554980724, now seen corresponding path program 3 times [2022-07-21 16:58:16,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:16,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988883405] [2022-07-21 16:58:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:16,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:58:17,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:17,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988883405] [2022-07-21 16:58:17,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988883405] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:17,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567425944] [2022-07-21 16:58:17,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:58:17,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:17,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:17,110 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:17,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 16:58:17,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:58:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-21 16:58:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:17,231 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:58:17,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:58:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:58:17,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:58:17,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567425944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:17,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:17,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2022-07-21 16:58:17,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677942271] [2022-07-21 16:58:17,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:17,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 16:58:17,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:17,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 16:58:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 16:58:17,812 INFO L87 Difference]: Start difference. First operand 356 states and 396 transitions. Second operand has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:18,292 INFO L93 Difference]: Finished difference Result 464 states and 503 transitions. [2022-07-21 16:58:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:58:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-21 16:58:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:18,293 INFO L225 Difference]: With dead ends: 464 [2022-07-21 16:58:18,293 INFO L226 Difference]: Without dead ends: 464 [2022-07-21 16:58:18,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 16:58:18,294 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 401 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:18,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 435 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:58:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-07-21 16:58:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 387. [2022-07-21 16:58:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 383 states have (on average 1.1174934725848564) internal successors, (428), 386 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 428 transitions. [2022-07-21 16:58:18,301 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 428 transitions. Word has length 53 [2022-07-21 16:58:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:18,301 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 428 transitions. [2022-07-21 16:58:18,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 428 transitions. [2022-07-21 16:58:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 16:58:18,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:18,301 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:18,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:18,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-21 16:58:18,502 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:18,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1402960811, now seen corresponding path program 13 times [2022-07-21 16:58:18,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:18,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127377176] [2022-07-21 16:58:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:18,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:18,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:18,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127377176] [2022-07-21 16:58:18,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127377176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:18,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835564863] [2022-07-21 16:58:18,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:58:18,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:18,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:18,665 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:18,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 16:58:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:18,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-21 16:58:18,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:18,803 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:58:18,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:58:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:19,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 91 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:20,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835564863] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:20,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:20,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 58 [2022-07-21 16:58:20,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558521823] [2022-07-21 16:58:20,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:20,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 16:58:20,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 16:58:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=3085, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 16:58:20,749 INFO L87 Difference]: Start difference. First operand 387 states and 428 transitions. Second operand has 59 states, 58 states have (on average 2.793103448275862) internal successors, (162), 59 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:22,353 INFO L93 Difference]: Finished difference Result 767 states and 830 transitions. [2022-07-21 16:58:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 16:58:22,353 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.793103448275862) internal successors, (162), 59 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-21 16:58:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:22,355 INFO L225 Difference]: With dead ends: 767 [2022-07-21 16:58:22,355 INFO L226 Difference]: Without dead ends: 751 [2022-07-21 16:58:22,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1200, Invalid=7920, Unknown=0, NotChecked=0, Total=9120 [2022-07-21 16:58:22,356 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 433 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1422 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:22,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1797 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1160 Invalid, 0 Unknown, 1422 Unchecked, 0.4s Time] [2022-07-21 16:58:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-07-21 16:58:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 415. [2022-07-21 16:58:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 411 states have (on average 1.1143552311435523) internal successors, (458), 414 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 458 transitions. [2022-07-21 16:58:22,361 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 458 transitions. Word has length 56 [2022-07-21 16:58:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:22,361 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 458 transitions. [2022-07-21 16:58:22,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.793103448275862) internal successors, (162), 59 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 458 transitions. [2022-07-21 16:58:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 16:58:22,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:22,362 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:22,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-21 16:58:22,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-21 16:58:22,580 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 374392270, now seen corresponding path program 14 times [2022-07-21 16:58:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:22,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043309801] [2022-07-21 16:58:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:22,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:22,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043309801] [2022-07-21 16:58:22,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043309801] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833292841] [2022-07-21 16:58:22,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:58:22,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:22,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:22,935 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:22,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 16:58:23,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:58:23,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:23,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-21 16:58:23,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:23,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:23,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:58:23,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:58:23,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:58:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:23,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:23,554 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1409 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1409) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:58:23,558 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:23,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:58:23,565 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:23,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-21 16:58:23,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:58:23,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:23,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833292841] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:23,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:23,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 51 [2022-07-21 16:58:23,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811335302] [2022-07-21 16:58:23,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:23,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 16:58:23,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:23,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 16:58:23,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2283, Unknown=1, NotChecked=96, Total=2550 [2022-07-21 16:58:23,931 INFO L87 Difference]: Start difference. First operand 415 states and 458 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:25,063 INFO L93 Difference]: Finished difference Result 555 states and 601 transitions. [2022-07-21 16:58:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 16:58:25,063 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-21 16:58:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:25,064 INFO L225 Difference]: With dead ends: 555 [2022-07-21 16:58:25,064 INFO L226 Difference]: Without dead ends: 512 [2022-07-21 16:58:25,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=365, Invalid=4750, Unknown=1, NotChecked=140, Total=5256 [2022-07-21 16:58:25,065 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:25,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1241 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1396 Invalid, 0 Unknown, 140 Unchecked, 0.5s Time] [2022-07-21 16:58:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-07-21 16:58:25,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 424. [2022-07-21 16:58:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 420 states have (on average 1.111904761904762) internal successors, (467), 423 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 467 transitions. [2022-07-21 16:58:25,068 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 467 transitions. Word has length 58 [2022-07-21 16:58:25,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:25,068 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 467 transitions. [2022-07-21 16:58:25,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 467 transitions. [2022-07-21 16:58:25,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 16:58:25,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:25,069 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:25,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:25,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:25,283 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:25,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1250411276, now seen corresponding path program 6 times [2022-07-21 16:58:25,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:25,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140957751] [2022-07-21 16:58:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:25,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 41 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:26,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140957751] [2022-07-21 16:58:26,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140957751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789798340] [2022-07-21 16:58:26,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:58:26,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:26,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:26,372 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:26,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-21 16:58:26,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-21 16:58:26,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-21 16:58:26,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:26,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:27,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:58:27,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:58:28,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:28,008 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:28,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 34 [2022-07-21 16:58:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:28,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:28,441 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1459 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1459) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-07-21 16:58:28,448 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:28,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 97 [2022-07-21 16:58:28,523 INFO L356 Elim1Store]: treesize reduction 280, result has 20.2 percent of original size [2022-07-21 16:58:28,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 186 treesize of output 206 [2022-07-21 16:58:28,534 INFO L356 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-07-21 16:58:28,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 76 treesize of output 50 [2022-07-21 16:58:29,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:29,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789798340] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:29,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:29,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 73 [2022-07-21 16:58:29,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384816482] [2022-07-21 16:58:29,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:29,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-21 16:58:29,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:29,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-21 16:58:29,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=4708, Unknown=1, NotChecked=140, Total=5256 [2022-07-21 16:58:29,929 INFO L87 Difference]: Start difference. First operand 424 states and 467 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:33,264 INFO L93 Difference]: Finished difference Result 634 states and 692 transitions. [2022-07-21 16:58:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-21 16:58:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-21 16:58:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:33,266 INFO L225 Difference]: With dead ends: 634 [2022-07-21 16:58:33,266 INFO L226 Difference]: Without dead ends: 578 [2022-07-21 16:58:33,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3609 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1380, Invalid=13143, Unknown=1, NotChecked=238, Total=14762 [2022-07-21 16:58:33,268 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 777 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:33,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 814 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1797 Invalid, 0 Unknown, 127 Unchecked, 0.7s Time] [2022-07-21 16:58:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-07-21 16:58:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 443. [2022-07-21 16:58:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 439 states have (on average 1.1138952164009113) internal successors, (489), 442 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 489 transitions. [2022-07-21 16:58:33,273 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 489 transitions. Word has length 58 [2022-07-21 16:58:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:33,274 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 489 transitions. [2022-07-21 16:58:33,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 489 transitions. [2022-07-21 16:58:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 16:58:33,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:33,275 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-07-21 16:58:33,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:33,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:33,489 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1533222772, now seen corresponding path program 4 times [2022-07-21 16:58:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:33,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381052454] [2022-07-21 16:58:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:33,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:33,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381052454] [2022-07-21 16:58:33,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381052454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:33,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108226088] [2022-07-21 16:58:33,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:58:33,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:33,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:33,897 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:33,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-21 16:58:34,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:58:34,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:34,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 16:58:34,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:34,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:34,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:58:34,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:58:34,668 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:34,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-21 16:58:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:34,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:34,986 WARN L833 $PredicateComparison]: unable to prove that (or (= (mod (+ |c_ULTIMATE.start_main_~n~0#1| 4294967295) 4294967296) 0) (forall ((v_ArrVal_1514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1514) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0))) is different from false [2022-07-21 16:58:34,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:34,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:58:34,997 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:34,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-21 16:58:35,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:58:35,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:35,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108226088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:35,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:35,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 54 [2022-07-21 16:58:35,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883419027] [2022-07-21 16:58:35,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:35,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 16:58:35,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:35,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 16:58:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2459, Unknown=1, NotChecked=102, Total=2862 [2022-07-21 16:58:35,555 INFO L87 Difference]: Start difference. First operand 443 states and 489 transitions. Second operand has 54 states, 54 states have (on average 2.537037037037037) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:36,741 INFO L93 Difference]: Finished difference Result 546 states and 597 transitions. [2022-07-21 16:58:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 16:58:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.537037037037037) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-21 16:58:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:36,743 INFO L225 Difference]: With dead ends: 546 [2022-07-21 16:58:36,743 INFO L226 Difference]: Without dead ends: 538 [2022-07-21 16:58:36,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=774, Invalid=4779, Unknown=1, NotChecked=146, Total=5700 [2022-07-21 16:58:36,744 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 262 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:36,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 607 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 735 Invalid, 0 Unknown, 160 Unchecked, 0.4s Time] [2022-07-21 16:58:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-07-21 16:58:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 449. [2022-07-21 16:58:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 445 states have (on average 1.1168539325842697) internal successors, (497), 448 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 497 transitions. [2022-07-21 16:58:36,757 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 497 transitions. Word has length 58 [2022-07-21 16:58:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:36,757 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 497 transitions. [2022-07-21 16:58:36,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.537037037037037) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 497 transitions. [2022-07-21 16:58:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 16:58:36,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:36,767 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:36,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-21 16:58:36,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:36,984 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:36,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash -859796103, now seen corresponding path program 4 times [2022-07-21 16:58:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:36,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041742257] [2022-07-21 16:58:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:36,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:58:37,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:37,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041742257] [2022-07-21 16:58:37,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041742257] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:37,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184398001] [2022-07-21 16:58:37,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:58:37,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:37,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:37,167 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:37,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-21 16:58:37,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:58:37,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:37,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-21 16:58:37,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:37,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:58:37,679 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-21 16:58:37,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 42 [2022-07-21 16:58:37,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:37,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:37,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-07-21 16:58:37,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-07-21 16:58:37,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:37,956 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:37,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2022-07-21 16:58:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:58:37,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:38,028 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-07-21 16:58:38,033 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2022-07-21 16:58:38,040 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) (= |c_ULTIMATE.start_cstrncat_#t~mem6#1| 0)) is different from false [2022-07-21 16:58:38,047 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_#t~post5#1.base|) |c_ULTIMATE.start_cstrncat_#t~post5#1.offset|) 0)) is different from false [2022-07-21 16:58:38,052 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-07-21 16:58:38,092 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1572 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-07-21 16:58:38,099 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) |c_ULTIMATE.start_cstrncat_~src#1.offset|) 0) (forall ((v_ArrVal_1572 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0) (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~dst#1.offset|) 0))))) is different from false [2022-07-21 16:58:38,106 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0) (forall ((v_ArrVal_1572 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)))) is different from false [2022-07-21 16:58:38,134 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-21 16:58:38,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 69 treesize of output 85 [2022-07-21 16:58:38,143 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:38,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 51 [2022-07-21 16:58:38,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:58:38,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:38,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-07-21 16:58:38,184 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:38,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2022-07-21 16:58:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 13 not checked. [2022-07-21 16:58:38,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184398001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:38,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:38,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 20] total 52 [2022-07-21 16:58:38,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401385110] [2022-07-21 16:58:38,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:38,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 16:58:38,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:38,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 16:58:38,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1757, Unknown=8, NotChecked=728, Total=2652 [2022-07-21 16:58:38,460 INFO L87 Difference]: Start difference. First operand 449 states and 497 transitions. Second operand has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:39,707 WARN L833 $PredicateComparison]: unable to prove that (and (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) |c_ULTIMATE.start_cstrncat_~src#1.offset|) 0) (forall ((v_ArrVal_1572 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0) (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~dst#1.offset|) 0))))) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ (- 1) |ULTIMATE.start_main_~length2~0#1|)) 0) (<= |ULTIMATE.start_main_~length2~0#1| 3) (< 2 |ULTIMATE.start_main_~length2~0#1|))) (= |c_ULTIMATE.start_cstrncat_~dst#1.offset| 0) (= |c_ULTIMATE.start_cstrncat_~src#1.offset| 0)) is different from false [2022-07-21 16:58:39,828 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_1572 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) (= |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~length2~0#1|)) 0) (<= |ULTIMATE.start_main_~length2~0#1| 3) (< 2 |ULTIMATE.start_main_~length2~0#1|))) (= |c_ULTIMATE.start_cstrncat_~d~0#1.offset| 0)) is different from false [2022-07-21 16:58:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:40,620 INFO L93 Difference]: Finished difference Result 658 states and 715 transitions. [2022-07-21 16:58:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-21 16:58:40,620 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-21 16:58:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:40,622 INFO L225 Difference]: With dead ends: 658 [2022-07-21 16:58:40,622 INFO L226 Difference]: Without dead ends: 586 [2022-07-21 16:58:40,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 129 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 4468 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1339, Invalid=13210, Unknown=11, NotChecked=2470, Total=17030 [2022-07-21 16:58:40,623 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 493 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:40,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 555 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 586 Invalid, 0 Unknown, 1135 Unchecked, 0.2s Time] [2022-07-21 16:58:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-07-21 16:58:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 489. [2022-07-21 16:58:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.1134020618556701) internal successors, (540), 488 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 540 transitions. [2022-07-21 16:58:40,627 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 540 transitions. Word has length 59 [2022-07-21 16:58:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:40,627 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 540 transitions. [2022-07-21 16:58:40,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 540 transitions. [2022-07-21 16:58:40,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 16:58:40,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:40,630 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:40,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-21 16:58:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-21 16:58:40,860 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash -469355232, now seen corresponding path program 2 times [2022-07-21 16:58:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:40,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118150273] [2022-07-21 16:58:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 16:58:41,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:41,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118150273] [2022-07-21 16:58:41,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118150273] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:41,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297021509] [2022-07-21 16:58:41,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:58:41,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:41,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:41,022 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:41,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-21 16:58:41,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:58:41,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-21 16:58:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:41,189 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:58:41,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:58:41,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:41,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:58:41,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:41,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:41,703 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:41,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-21 16:58:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 16:58:41,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:41,910 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1634 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1634) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) (and (<= 0 (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) (<= (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s~0#1.base|)))) is different from false [2022-07-21 16:58:41,991 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1634 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1634) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) 0) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 4) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s~0#1.base|)) (not (<= |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| |c_ULTIMATE.start_cstrncat_~s~0#1.offset|)))) is different from false [2022-07-21 16:58:42,018 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1634 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_1634) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 2 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) 0) (< |c_ULTIMATE.start_cstrncat_~src#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 4) (select |c_#length| |c_ULTIMATE.start_cstrncat_~src#1.base|)))) is different from false [2022-07-21 16:58:42,025 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1634 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1634) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) 0))) is different from false [2022-07-21 16:58:42,030 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:42,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:58:42,034 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:42,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:58:42,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:58:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 8 not checked. [2022-07-21 16:58:42,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297021509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:42,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:42,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2022-07-21 16:58:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884253987] [2022-07-21 16:58:42,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:42,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 16:58:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 16:58:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1579, Unknown=4, NotChecked=332, Total=2070 [2022-07-21 16:58:42,496 INFO L87 Difference]: Start difference. First operand 489 states and 540 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:43,943 INFO L93 Difference]: Finished difference Result 667 states and 723 transitions. [2022-07-21 16:58:43,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 16:58:43,943 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-21 16:58:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:43,944 INFO L225 Difference]: With dead ends: 667 [2022-07-21 16:58:43,945 INFO L226 Difference]: Without dead ends: 623 [2022-07-21 16:58:43,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=771, Invalid=6551, Unknown=4, NotChecked=684, Total=8010 [2022-07-21 16:58:43,945 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 199 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:43,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 479 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 487 Invalid, 0 Unknown, 635 Unchecked, 0.2s Time] [2022-07-21 16:58:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-07-21 16:58:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 500. [2022-07-21 16:58:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 496 states have (on average 1.1068548387096775) internal successors, (549), 499 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 549 transitions. [2022-07-21 16:58:43,949 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 549 transitions. Word has length 61 [2022-07-21 16:58:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:43,949 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 549 transitions. [2022-07-21 16:58:43,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 549 transitions. [2022-07-21 16:58:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 16:58:43,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:43,950 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:43,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:44,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-21 16:58:44,163 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:44,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:44,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1518395567, now seen corresponding path program 15 times [2022-07-21 16:58:44,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:44,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374478006] [2022-07-21 16:58:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:44,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:44,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:44,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374478006] [2022-07-21 16:58:44,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374478006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:44,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896512141] [2022-07-21 16:58:44,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:58:44,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:44,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:44,426 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:44,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-21 16:58:44,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-21 16:58:44,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:44,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 16:58:44,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:44,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:44,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-07-21 16:58:44,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 91 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:45,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 120 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:45,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896512141] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:45,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:45,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2022-07-21 16:58:45,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558558760] [2022-07-21 16:58:45,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:45,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-21 16:58:45,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:45,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-21 16:58:45,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 16:58:45,638 INFO L87 Difference]: Start difference. First operand 500 states and 549 transitions. Second operand has 62 states, 61 states have (on average 2.8852459016393444) internal successors, (176), 62 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:46,587 INFO L93 Difference]: Finished difference Result 1028 states and 1109 transitions. [2022-07-21 16:58:46,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 16:58:46,588 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.8852459016393444) internal successors, (176), 62 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-21 16:58:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:46,590 INFO L225 Difference]: With dead ends: 1028 [2022-07-21 16:58:46,590 INFO L226 Difference]: Without dead ends: 1012 [2022-07-21 16:58:46,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1214, Invalid=4948, Unknown=0, NotChecked=0, Total=6162 [2022-07-21 16:58:46,590 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 776 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:46,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 1406 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 16:58:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-07-21 16:58:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 534. [2022-07-21 16:58:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 530 states have (on average 1.1037735849056605) internal successors, (585), 533 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:46,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 585 transitions. [2022-07-21 16:58:46,596 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 585 transitions. Word has length 62 [2022-07-21 16:58:46,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:46,596 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 585 transitions. [2022-07-21 16:58:46,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.8852459016393444) internal successors, (176), 62 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:46,596 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 585 transitions. [2022-07-21 16:58:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 16:58:46,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:46,597 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:46,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:46,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-21 16:58:46,816 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:46,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1110741450, now seen corresponding path program 16 times [2022-07-21 16:58:46,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:46,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875347329] [2022-07-21 16:58:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:46,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 24 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:47,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:47,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875347329] [2022-07-21 16:58:47,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875347329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:47,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453131655] [2022-07-21 16:58:47,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:58:47,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:47,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:47,454 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:47,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-21 16:58:47,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:58:47,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 16:58:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:47,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:47,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:58:47,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:48,350 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 16:58:48,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-21 16:58:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 24 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:48,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:48,612 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1743 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1743) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:58:48,621 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:48,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:58:48,624 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:48,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-21 16:58:48,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:58:49,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 24 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:49,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453131655] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:49,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:49,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 73 [2022-07-21 16:58:49,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134834879] [2022-07-21 16:58:49,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:49,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-21 16:58:49,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:49,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-21 16:58:49,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=4891, Unknown=1, NotChecked=140, Total=5256 [2022-07-21 16:58:49,144 INFO L87 Difference]: Start difference. First operand 534 states and 585 transitions. Second operand has 73 states, 73 states have (on average 2.4383561643835616) internal successors, (178), 73 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:51,850 INFO L93 Difference]: Finished difference Result 635 states and 688 transitions. [2022-07-21 16:58:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 16:58:51,851 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.4383561643835616) internal successors, (178), 73 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-21 16:58:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:51,852 INFO L225 Difference]: With dead ends: 635 [2022-07-21 16:58:51,852 INFO L226 Difference]: Without dead ends: 588 [2022-07-21 16:58:51,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 1 IntricatePredicates, 10 DeprecatedPredicates, 3985 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=748, Invalid=14016, Unknown=2, NotChecked=240, Total=15006 [2022-07-21 16:58:51,853 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 256 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 2416 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:51,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1561 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2416 Invalid, 0 Unknown, 288 Unchecked, 0.8s Time] [2022-07-21 16:58:51,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-07-21 16:58:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 543. [2022-07-21 16:58:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 539 states have (on average 1.1020408163265305) internal successors, (594), 542 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 594 transitions. [2022-07-21 16:58:51,857 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 594 transitions. Word has length 64 [2022-07-21 16:58:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:51,857 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 594 transitions. [2022-07-21 16:58:51,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.4383561643835616) internal successors, (178), 73 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 594 transitions. [2022-07-21 16:58:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 16:58:51,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:51,858 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:51,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:52,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-21 16:58:52,076 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 16:58:52,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:52,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1312565384, now seen corresponding path program 7 times [2022-07-21 16:58:52,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:52,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34917613] [2022-07-21 16:58:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:52,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 54 proven. 146 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:53,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:53,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34917613] [2022-07-21 16:58:53,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34917613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:53,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010442047] [2022-07-21 16:58:53,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:58:53,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:53,017 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:53,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-21 16:58:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-21 16:58:53,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:53,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:53,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:58:53,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:59:13,988 INFO L356 Elim1Store]: treesize reduction 403, result has 10.2 percent of original size [2022-07-21 16:59:13,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 91 treesize of output 80 [2022-07-21 16:59:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 44 proven. 127 refuted. 29 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:14,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:14,524 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1798 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1798) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1))) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-07-21 16:59:14,532 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:14,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 109 [2022-07-21 16:59:14,633 INFO L356 Elim1Store]: treesize reduction 368, result has 18.0 percent of original size [2022-07-21 16:59:14,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 211 treesize of output 235 [2022-07-21 16:59:14,649 INFO L356 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-07-21 16:59:14,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 57 [2022-07-21 16:59:16,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:59:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 80 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:16,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010442047] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:16,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:16,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 80 [2022-07-21 16:59:16,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756195148] [2022-07-21 16:59:16,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:16,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-21 16:59:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-21 16:59:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=5602, Unknown=35, NotChecked=154, Total=6320 [2022-07-21 16:59:16,850 INFO L87 Difference]: Start difference. First operand 543 states and 594 transitions. Second operand has 80 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:09,286 INFO L93 Difference]: Finished difference Result 713 states and 783 transitions. [2022-07-21 17:00:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 17:00:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-21 17:00:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:09,288 INFO L225 Difference]: With dead ends: 713 [2022-07-21 17:00:09,288 INFO L226 Difference]: Without dead ends: 651 [2022-07-21 17:00:09,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 74.3s TimeCoverageRelationStatistics Valid=1528, Invalid=13887, Unknown=89, NotChecked=246, Total=15750 [2022-07-21 17:00:09,289 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 574 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:09,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 821 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 916 Invalid, 0 Unknown, 527 Unchecked, 0.4s Time] [2022-07-21 17:00:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-07-21 17:00:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 572. [2022-07-21 17:00:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 568 states have (on average 1.1038732394366197) internal successors, (627), 571 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 627 transitions. [2022-07-21 17:00:09,294 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 627 transitions. Word has length 64 [2022-07-21 17:00:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:09,294 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 627 transitions. [2022-07-21 17:00:09,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 627 transitions. [2022-07-21 17:00:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 17:00:09,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:09,295 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2022-07-21 17:00:09,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-21 17:00:09,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:09,495 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 17:00:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:09,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1729983568, now seen corresponding path program 5 times [2022-07-21 17:00:09,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:09,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554726991] [2022-07-21 17:00:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:09,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:10,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:10,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554726991] [2022-07-21 17:00:10,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554726991] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:10,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818725812] [2022-07-21 17:00:10,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:00:10,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:10,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:10,368 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:10,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-21 17:00:10,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 17:00:10,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:10,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-21 17:00:10,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:10,578 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:10,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:00:11,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 17:00:11,440 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:11,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-07-21 17:00:11,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-07-21 17:00:11,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:11,982 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:11,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 45 [2022-07-21 17:00:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:12,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:13,010 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:13,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-07-21 17:00:13,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:00:13,022 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:13,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 75 [2022-07-21 17:00:13,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:00:13,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-21 17:00:15,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-07-21 17:00:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:15,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818725812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:15,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:15,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 29] total 81 [2022-07-21 17:00:15,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157239329] [2022-07-21 17:00:15,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:15,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-21 17:00:15,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:15,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-21 17:00:15,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=6046, Unknown=1, NotChecked=0, Total=6480 [2022-07-21 17:00:15,111 INFO L87 Difference]: Start difference. First operand 572 states and 627 transitions. Second operand has 81 states, 81 states have (on average 2.197530864197531) internal successors, (178), 81 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:20,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:20,304 INFO L93 Difference]: Finished difference Result 667 states and 730 transitions. [2022-07-21 17:00:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 17:00:20,304 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.197530864197531) internal successors, (178), 81 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-21 17:00:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:20,306 INFO L225 Difference]: With dead ends: 667 [2022-07-21 17:00:20,306 INFO L226 Difference]: Without dead ends: 645 [2022-07-21 17:00:20,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3979 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1165, Invalid=15344, Unknown=3, NotChecked=0, Total=16512 [2022-07-21 17:00:20,308 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 260 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:20,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1130 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1359 Invalid, 0 Unknown, 598 Unchecked, 0.6s Time] [2022-07-21 17:00:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-07-21 17:00:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 592. [2022-07-21 17:00:20,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 588 states have (on average 1.1088435374149659) internal successors, (652), 591 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 652 transitions. [2022-07-21 17:00:20,312 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 652 transitions. Word has length 64 [2022-07-21 17:00:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:20,312 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 652 transitions. [2022-07-21 17:00:20,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.197530864197531) internal successors, (178), 81 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 652 transitions. [2022-07-21 17:00:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 17:00:20,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:20,314 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:20,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:20,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-21 17:00:20,555 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 17:00:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:20,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1397521677, now seen corresponding path program 17 times [2022-07-21 17:00:20,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:20,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829202169] [2022-07-21 17:00:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:20,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:20,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:20,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829202169] [2022-07-21 17:00:20,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829202169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:20,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631242443] [2022-07-21 17:00:20,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:00:20,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:20,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:20,827 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:20,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-21 17:00:20,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-21 17:00:20,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 17:00:20,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:20,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:20,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2022-07-21 17:00:20,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 17:00:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:21,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 153 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:22,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631242443] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:22,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:22,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 66 [2022-07-21 17:00:22,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475667000] [2022-07-21 17:00:22,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:22,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-21 17:00:22,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:22,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-21 17:00:22,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=3942, Unknown=0, NotChecked=0, Total=4422 [2022-07-21 17:00:22,327 INFO L87 Difference]: Start difference. First operand 592 states and 652 transitions. Second operand has 67 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 67 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:23,698 INFO L93 Difference]: Finished difference Result 1331 states and 1436 transitions. [2022-07-21 17:00:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 17:00:23,699 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 67 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-21 17:00:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:23,701 INFO L225 Difference]: With dead ends: 1331 [2022-07-21 17:00:23,701 INFO L226 Difference]: Without dead ends: 1315 [2022-07-21 17:00:23,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1664, Invalid=7266, Unknown=0, NotChecked=0, Total=8930 [2022-07-21 17:00:23,702 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1082 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:23,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 1462 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:00:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-07-21 17:00:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 626. [2022-07-21 17:00:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 622 states have (on average 1.1061093247588425) internal successors, (688), 625 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 688 transitions. [2022-07-21 17:00:23,709 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 688 transitions. Word has length 68 [2022-07-21 17:00:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:23,709 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 688 transitions. [2022-07-21 17:00:23,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 67 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 688 transitions. [2022-07-21 17:00:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 17:00:23,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:23,720 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:23,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:23,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-21 17:00:23,939 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 17:00:23,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:23,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2119424490, now seen corresponding path program 6 times [2022-07-21 17:00:23,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:23,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013438051] [2022-07-21 17:00:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:23,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 17:00:24,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:24,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013438051] [2022-07-21 17:00:24,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013438051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:24,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344200592] [2022-07-21 17:00:24,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:00:24,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:24,312 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:24,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-21 17:00:24,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 17:00:24,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:24,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 17:00:24,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:24,503 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:24,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:00:24,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 17:00:25,077 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:25,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-21 17:00:25,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-21 17:00:25,320 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:25,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-07-21 17:00:25,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:00:25,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-07-21 17:00:25,552 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:00:25,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2022-07-21 17:00:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 17:00:25,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:26,266 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:26,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 17:00:26,270 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:26,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 17:00:26,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:00:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 17:00:26,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344200592] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:26,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:26,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 23] total 62 [2022-07-21 17:00:26,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912090528] [2022-07-21 17:00:26,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:26,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-21 17:00:26,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:26,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-21 17:00:26,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3515, Unknown=9, NotChecked=0, Total=3782 [2022-07-21 17:00:26,804 INFO L87 Difference]: Start difference. First operand 626 states and 688 transitions. Second operand has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:28,387 INFO L93 Difference]: Finished difference Result 893 states and 977 transitions. [2022-07-21 17:00:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 17:00:28,388 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-21 17:00:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:28,389 INFO L225 Difference]: With dead ends: 893 [2022-07-21 17:00:28,389 INFO L226 Difference]: Without dead ends: 769 [2022-07-21 17:00:28,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=714, Invalid=8566, Unknown=32, NotChecked=0, Total=9312 [2022-07-21 17:00:28,391 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:28,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 659 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 383 Invalid, 0 Unknown, 389 Unchecked, 0.1s Time] [2022-07-21 17:00:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-07-21 17:00:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 664. [2022-07-21 17:00:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 660 states have (on average 1.106060606060606) internal successors, (730), 663 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 730 transitions. [2022-07-21 17:00:28,396 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 730 transitions. Word has length 68 [2022-07-21 17:00:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:28,396 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 730 transitions. [2022-07-21 17:00:28,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 730 transitions. [2022-07-21 17:00:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 17:00:28,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:28,398 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:28,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:28,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-07-21 17:00:28,611 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 17:00:28,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:28,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1306431354, now seen corresponding path program 18 times [2022-07-21 17:00:28,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:28,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979582424] [2022-07-21 17:00:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:28,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:29,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:29,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979582424] [2022-07-21 17:00:29,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979582424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:29,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091843360] [2022-07-21 17:00:29,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:00:29,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:29,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:29,164 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:29,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-21 17:00:29,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-21 17:00:29,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-21 17:00:29,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:29,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 17:00:29,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 17:00:29,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 17:00:29,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:00:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:29,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:30,012 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2036 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2036) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:00:30,015 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:30,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 17:00:30,025 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:30,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-21 17:00:30,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:00:30,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 17:00:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:30,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091843360] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:30,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:30,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 59 [2022-07-21 17:00:30,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987864353] [2022-07-21 17:00:30,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:30,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 17:00:30,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 17:00:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3113, Unknown=1, NotChecked=112, Total=3422 [2022-07-21 17:00:30,357 INFO L87 Difference]: Start difference. First operand 664 states and 730 transitions. Second operand has 59 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 59 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:31,445 INFO L93 Difference]: Finished difference Result 773 states and 841 transitions. [2022-07-21 17:00:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 17:00:31,451 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 59 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-21 17:00:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:31,460 INFO L225 Difference]: With dead ends: 773 [2022-07-21 17:00:31,460 INFO L226 Difference]: Without dead ends: 722 [2022-07-21 17:00:31,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=457, Invalid=6352, Unknown=1, NotChecked=162, Total=6972 [2022-07-21 17:00:31,461 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 148 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:31,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1211 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1783 Invalid, 0 Unknown, 174 Unchecked, 0.5s Time] [2022-07-21 17:00:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-07-21 17:00:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 673. [2022-07-21 17:00:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 669 states have (on average 1.1046337817638265) internal successors, (739), 672 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 739 transitions. [2022-07-21 17:00:31,466 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 739 transitions. Word has length 70 [2022-07-21 17:00:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:31,466 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 739 transitions. [2022-07-21 17:00:31,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 59 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 739 transitions. [2022-07-21 17:00:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 17:00:31,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:31,467 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:31,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:31,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:31,688 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-21 17:00:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:31,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2038398780, now seen corresponding path program 8 times [2022-07-21 17:00:31,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:31,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352001591] [2022-07-21 17:00:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:31,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 69 proven. 183 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:32,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:32,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352001591] [2022-07-21 17:00:32,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352001591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:32,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031027274] [2022-07-21 17:00:32,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:32,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:32,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:32,948 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:32,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-21 17:00:33,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:33,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:33,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-21 17:00:33,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:33,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 17:00:33,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 17:00:33,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 17:01:08,265 INFO L356 Elim1Store]: treesize reduction 507, result has 9.3 percent of original size [2022-07-21 17:01:08,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 101 treesize of output 90 [2022-07-21 17:01:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 50 proven. 161 refuted. 41 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:08,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:10,466 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2095 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2095) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 8 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-07-21 17:01:10,474 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:10,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 121 [2022-07-21 17:01:10,609 INFO L356 Elim1Store]: treesize reduction 468, result has 16.3 percent of original size [2022-07-21 17:01:10,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 236 treesize of output 264 [2022-07-21 17:01:10,624 INFO L356 Elim1Store]: treesize reduction 416, result has 0.2 percent of original size [2022-07-21 17:01:10,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 98 treesize of output 64 [2022-07-21 17:01:13,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 17:01:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 99 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:13,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031027274] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:13,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:13,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 36] total 86 [2022-07-21 17:01:13,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591023988] [2022-07-21 17:01:13,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:13,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-21 17:01:13,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:13,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-21 17:01:13,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=6454, Unknown=58, NotChecked=166, Total=7310 [2022-07-21 17:01:13,151 INFO L87 Difference]: Start difference. First operand 673 states and 739 transitions. Second operand has 86 states, 86 states have (on average 2.116279069767442) internal successors, (182), 86 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)