./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0220.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0220.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 1080615baa8f6ab055f34c400ddd3cb1288c5bcfd5f3427bea182230e940eff7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 02:49:24,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 02:49:24,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 02:49:24,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 02:49:24,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 02:49:24,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 02:49:24,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 02:49:24,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 02:49:24,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 02:49:24,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 02:49:24,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 02:49:24,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 02:49:24,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 02:49:24,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 02:49:24,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 02:49:24,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 02:49:24,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 02:49:24,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 02:49:24,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 02:49:24,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 02:49:24,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 02:49:24,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 02:49:24,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 02:49:24,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 02:49:24,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 02:49:24,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 02:49:24,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 02:49:24,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 02:49:24,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 02:49:24,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 02:49:24,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 02:49:24,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 02:49:24,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 02:49:24,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 02:49:24,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 02:49:24,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 02:49:24,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 02:49:24,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 02:49:24,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 02:49:24,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 02:49:24,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 02:49:24,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 02:49:24,997 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 02:49:24,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 02:49:24,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 02:49:24,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 02:49:24,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 02:49:24,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 02:49:24,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 02:49:24,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 02:49:25,000 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 02:49:25,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 02:49:25,000 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 02:49:25,000 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 02:49:25,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 02:49:25,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 02:49:25,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 02:49:25,001 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 02:49:25,001 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 02:49:25,001 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 02:49:25,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 02:49:25,002 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 02:49:25,002 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 02:49:25,002 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 02:49:25,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 02:49:25,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 02:49:25,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 02:49:25,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:49:25,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 02:49:25,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 02:49:25,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 02:49:25,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 02:49:25,003 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 02:49:25,003 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 02:49:25,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 02:49:25,004 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 02:49:25,004 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1080615baa8f6ab055f34c400ddd3cb1288c5bcfd5f3427bea182230e940eff7 [2023-02-17 02:49:25,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 02:49:25,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 02:49:25,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 02:49:25,216 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 02:49:25,216 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 02:49:25,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0220.i [2023-02-17 02:49:26,215 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 02:49:26,433 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 02:49:26,436 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0220.i [2023-02-17 02:49:26,450 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542d46632/6ba60ea8e2d7435eba4119d69fd45f80/FLAG0612a7646 [2023-02-17 02:49:26,463 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542d46632/6ba60ea8e2d7435eba4119d69fd45f80 [2023-02-17 02:49:26,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 02:49:26,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 02:49:26,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 02:49:26,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 02:49:26,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 02:49:26,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ddb9667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26, skipping insertion in model container [2023-02-17 02:49:26,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 02:49:26,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 02:49:26,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:49:26,766 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 02:49:26,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:49:26,825 INFO L208 MainTranslator]: Completed translation [2023-02-17 02:49:26,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26 WrapperNode [2023-02-17 02:49:26,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 02:49:26,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 02:49:26,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 02:49:26,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 02:49:26,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,873 INFO L138 Inliner]: procedures = 180, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 113 [2023-02-17 02:49:26,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 02:49:26,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 02:49:26,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 02:49:26,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 02:49:26,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,909 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 02:49:26,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 02:49:26,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 02:49:26,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 02:49:26,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (1/1) ... [2023-02-17 02:49:26,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:49:26,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:49:26,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 02:49:26,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 02:49:26,998 INFO L130 BoogieDeclarations]: Found specification of procedure calloc_model [2023-02-17 02:49:26,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calloc_model [2023-02-17 02:49:26,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 02:49:26,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 02:49:26,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 02:49:26,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 02:49:26,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 02:49:26,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 02:49:27,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 02:49:27,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 02:49:27,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 02:49:27,104 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 02:49:27,106 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 02:49:27,369 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 02:49:27,375 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 02:49:27,377 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 02:49:27,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:49:27 BoogieIcfgContainer [2023-02-17 02:49:27,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 02:49:27,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 02:49:27,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 02:49:27,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 02:49:27,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 02:49:26" (1/3) ... [2023-02-17 02:49:27,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf564d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:49:27, skipping insertion in model container [2023-02-17 02:49:27,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:49:26" (2/3) ... [2023-02-17 02:49:27,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf564d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:49:27, skipping insertion in model container [2023-02-17 02:49:27,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:49:27" (3/3) ... [2023-02-17 02:49:27,384 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0220.i [2023-02-17 02:49:27,395 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 02:49:27,395 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-02-17 02:49:27,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 02:49:27,429 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4cba8e8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 02:49:27,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-02-17 02:49:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 105 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:49:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 02:49:27,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:49:27,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 02:49:27,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:49:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:49:27,441 INFO L85 PathProgramCache]: Analyzing trace with hash 928072, now seen corresponding path program 1 times [2023-02-17 02:49:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:49:27,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642558533] [2023-02-17 02:49:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:27,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:49:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:49:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:49:27,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:49:27,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642558533] [2023-02-17 02:49:27,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642558533] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:49:27,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:49:27,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:49:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177997697] [2023-02-17 02:49:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:49:27,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 02:49:27,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:49:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 02:49:27,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:49:27,564 INFO L87 Difference]: Start difference. First operand has 109 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 105 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:49:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:49:27,588 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2023-02-17 02:49:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 02:49:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-02-17 02:49:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:49:27,594 INFO L225 Difference]: With dead ends: 109 [2023-02-17 02:49:27,595 INFO L226 Difference]: Without dead ends: 107 [2023-02-17 02:49:27,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:49:27,599 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:49:27,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:49:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-17 02:49:27,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-02-17 02:49:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 103 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:49:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2023-02-17 02:49:27,633 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 4 [2023-02-17 02:49:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:49:27,633 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2023-02-17 02:49:27,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:49:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2023-02-17 02:49:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 02:49:27,634 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:49:27,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 02:49:27,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 02:49:27,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calloc_modelErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:49:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:49:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash 889700811, now seen corresponding path program 1 times [2023-02-17 02:49:27,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:49:27,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336484764] [2023-02-17 02:49:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:27,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:49:27,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:49:27,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075903515] [2023-02-17 02:49:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:27,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:49:27,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:49:27,662 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:49:27,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 02:49:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:49:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 02:49:27,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:49:27,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:49:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:49:27,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:49:27,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:49:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336484764] [2023-02-17 02:49:27,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:49:27,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075903515] [2023-02-17 02:49:27,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075903515] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:49:27,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:49:27,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:49:27,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851658512] [2023-02-17 02:49:27,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:49:27,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:49:27,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:49:27,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:49:27,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:49:27,778 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:49:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:49:27,867 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2023-02-17 02:49:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:49:27,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 02:49:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:49:27,870 INFO L225 Difference]: With dead ends: 106 [2023-02-17 02:49:27,871 INFO L226 Difference]: Without dead ends: 106 [2023-02-17 02:49:27,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:49:27,873 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:49:27,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 163 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:49:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-17 02:49:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-02-17 02:49:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.8448275862068966) internal successors, (107), 102 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:49:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2023-02-17 02:49:27,883 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 6 [2023-02-17 02:49:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:49:27,883 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2023-02-17 02:49:27,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:49:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2023-02-17 02:49:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 02:49:27,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:49:27,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:49:27,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 02:49:28,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:49:28,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calloc_modelErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:49:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:49:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1810921558, now seen corresponding path program 1 times [2023-02-17 02:49:28,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:49:28,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588730178] [2023-02-17 02:49:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:28,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:49:28,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:49:28,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534356637] [2023-02-17 02:49:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:28,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:49:28,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:49:28,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:49:28,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 02:49:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:49:28,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 02:49:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:49:28,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-17 02:49:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:49:28,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:49:28,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:49:28,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588730178] [2023-02-17 02:49:28,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:49:28,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534356637] [2023-02-17 02:49:28,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534356637] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:49:28,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:49:28,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:49:28,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910443684] [2023-02-17 02:49:28,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:49:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:49:28,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:49:28,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:49:28,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:49:28,244 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:49:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:49:28,339 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2023-02-17 02:49:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 02:49:28,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-17 02:49:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:49:28,340 INFO L225 Difference]: With dead ends: 105 [2023-02-17 02:49:28,340 INFO L226 Difference]: Without dead ends: 105 [2023-02-17 02:49:28,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:49:28,341 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 12 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:49:28,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 266 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:49:28,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-17 02:49:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-17 02:49:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 101 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:49:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2023-02-17 02:49:28,352 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 7 [2023-02-17 02:49:28,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:49:28,352 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2023-02-17 02:49:28,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:49:28,355 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2023-02-17 02:49:28,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 02:49:28,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:49:28,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:49:28,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 02:49:28,561 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,SelfDestructingSolverStorable2 [2023-02-17 02:49:28,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:49:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:49:28,564 INFO L85 PathProgramCache]: Analyzing trace with hash -713444144, now seen corresponding path program 1 times [2023-02-17 02:49:28,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:49:28,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478357775] [2023-02-17 02:49:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:28,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:49:28,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:49:28,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167710408] [2023-02-17 02:49:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:28,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:49:28,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:49:28,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:49:28,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 02:49:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:49:28,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 02:49:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:49:28,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:49:28,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 02:49:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 02:49:28,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:49:28,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:49:28,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478357775] [2023-02-17 02:49:28,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:49:28,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167710408] [2023-02-17 02:49:28,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167710408] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:49:28,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:49:28,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 02:49:28,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255586443] [2023-02-17 02:49:28,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:49:28,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 02:49:28,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:49:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 02:49:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:49:28,714 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 02:49:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:49:28,849 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2023-02-17 02:49:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:49:28,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-02-17 02:49:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:49:28,851 INFO L225 Difference]: With dead ends: 128 [2023-02-17 02:49:28,851 INFO L226 Difference]: Without dead ends: 128 [2023-02-17 02:49:28,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:49:28,852 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 65 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:49:28,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 348 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:49:28,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-17 02:49:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2023-02-17 02:49:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 58 states have (on average 1.7758620689655173) internal successors, (103), 98 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:49:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2023-02-17 02:49:28,858 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 26 [2023-02-17 02:49:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:49:28,858 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2023-02-17 02:49:28,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 02:49:28,858 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2023-02-17 02:49:28,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 02:49:28,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:49:28,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:49:28,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 02:49:29,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:49:29,064 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:49:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:49:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash -713444143, now seen corresponding path program 1 times [2023-02-17 02:49:29,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:49:29,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575608039] [2023-02-17 02:49:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:29,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:49:29,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:49:29,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061145758] [2023-02-17 02:49:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:29,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:49:29,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:49:29,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:49:29,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 02:49:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:49:29,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 02:49:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:49:29,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:49:29,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-02-17 02:49:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:49:31,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:49:31,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:49:31,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575608039] [2023-02-17 02:49:31,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:49:31,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061145758] [2023-02-17 02:49:31,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061145758] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:49:31,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:49:31,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:49:31,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244054046] [2023-02-17 02:49:31,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:49:31,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:49:31,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:49:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:49:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=12, Unknown=1, NotChecked=0, Total=20 [2023-02-17 02:49:31,348 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:49:33,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:49:35,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:49:39,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:49:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:49:41,559 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2023-02-17 02:49:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:49:41,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-02-17 02:49:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:49:41,560 INFO L225 Difference]: With dead ends: 106 [2023-02-17 02:49:41,561 INFO L226 Difference]: Without dead ends: 103 [2023-02-17 02:49:41,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=17, Invalid=22, Unknown=3, NotChecked=0, Total=42 [2023-02-17 02:49:41,561 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 12 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:49:41,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 353 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2023-02-17 02:49:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-17 02:49:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-02-17 02:49:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 99 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:49:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2023-02-17 02:49:41,566 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 26 [2023-02-17 02:49:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:49:41,566 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2023-02-17 02:49:41,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:49:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2023-02-17 02:49:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 02:49:41,567 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:49:41,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:49:41,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 02:49:41,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:49:41,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:49:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:49:41,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1474338645, now seen corresponding path program 1 times [2023-02-17 02:49:41,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:49:41,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714350841] [2023-02-17 02:49:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:49:41,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:49:41,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437223696] [2023-02-17 02:49:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:49:41,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:49:41,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:49:41,781 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:49:41,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 02:49:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:49:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 02:49:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:49:41,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:49:41,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-02-17 02:49:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 02:49:50,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:49:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 02:49:53,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:49:53,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714350841] [2023-02-17 02:49:53,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:49:53,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437223696] [2023-02-17 02:49:53,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437223696] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:49:53,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:49:53,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-02-17 02:49:53,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078383882] [2023-02-17 02:49:53,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:49:53,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 02:49:53,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:49:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 02:49:53,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=71, Unknown=5, NotChecked=0, Total=110 [2023-02-17 02:49:53,405 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 02:49:55,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:49:57,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:49:59,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:03,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:07,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:11,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:16,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:18,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:20,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:22,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:22,790 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2023-02-17 02:50:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 02:50:22,790 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-17 02:50:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:22,791 INFO L225 Difference]: With dead ends: 112 [2023-02-17 02:50:22,791 INFO L226 Difference]: Without dead ends: 106 [2023-02-17 02:50:22,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=87, Invalid=179, Unknown=6, NotChecked=0, Total=272 [2023-02-17 02:50:22,792 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 19 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:22,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 708 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 10 Unknown, 0 Unchecked, 21.0s Time] [2023-02-17 02:50:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-17 02:50:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-02-17 02:50:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 102 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:50:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2023-02-17 02:50:22,799 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 28 [2023-02-17 02:50:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:22,800 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2023-02-17 02:50:22,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 02:50:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2023-02-17 02:50:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 02:50:22,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:22,801 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:22,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 02:50:23,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:50:23,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:50:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1774687953, now seen corresponding path program 2 times [2023-02-17 02:50:23,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:23,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235773121] [2023-02-17 02:50:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:23,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:23,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:50:23,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098129994] [2023-02-17 02:50:23,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:50:23,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:50:23,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:50:23,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:50:23,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 02:50:23,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:50:23,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:50:23,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-17 02:50:23,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:50:23,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:50:32,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:50:32,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 02:50:32,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:50:32,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 02:50:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 02:50:32,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:50:33,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:50:33,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2023-02-17 02:50:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 02:50:34,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:34,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235773121] [2023-02-17 02:50:34,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:50:34,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098129994] [2023-02-17 02:50:34,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098129994] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:50:34,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:50:34,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2023-02-17 02:50:34,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744110787] [2023-02-17 02:50:34,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:50:34,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 02:50:34,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:34,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 02:50:34,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=607, Unknown=4, NotChecked=0, Total=702 [2023-02-17 02:50:34,052 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 02:50:36,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:42,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:46,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:48,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:50:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:52,605 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2023-02-17 02:50:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 02:50:52,605 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-02-17 02:50:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:52,606 INFO L225 Difference]: With dead ends: 130 [2023-02-17 02:50:52,606 INFO L226 Difference]: Without dead ends: 130 [2023-02-17 02:50:52,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=171, Invalid=947, Unknown=4, NotChecked=0, Total=1122 [2023-02-17 02:50:52,607 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 182 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:52,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 787 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1116 Invalid, 4 Unknown, 0 Unchecked, 11.2s Time] [2023-02-17 02:50:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-17 02:50:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2023-02-17 02:50:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 100 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:50:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2023-02-17 02:50:52,614 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 34 [2023-02-17 02:50:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:52,614 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2023-02-17 02:50:52,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 02:50:52,614 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2023-02-17 02:50:52,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 02:50:52,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:52,615 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:52,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 02:50:52,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:50:52,816 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:50:52,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:52,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2071966611, now seen corresponding path program 1 times [2023-02-17 02:50:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:52,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001043265] [2023-02-17 02:50:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:52,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:52,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:50:52,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275790468] [2023-02-17 02:50:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:52,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:50:52,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:50:52,830 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:50:52,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 02:50:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 02:50:52,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:50:52,964 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_310 Int)) (= |c_#valid| (store |c_old(#valid)| |c_calloc_model_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_310))) is different from true [2023-02-17 02:50:52,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:50:52,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-17 02:50:53,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:50:53,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-17 02:50:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 1 not checked. [2023-02-17 02:50:53,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:50:53,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:50:53,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2023-02-17 02:50:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 02:50:53,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:53,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001043265] [2023-02-17 02:50:53,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:50:53,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275790468] [2023-02-17 02:50:53,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275790468] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:50:53,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:50:53,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2023-02-17 02:50:53,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571742593] [2023-02-17 02:50:53,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:50:53,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 02:50:53,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:53,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 02:50:53,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-02-17 02:50:53,099 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:50:53,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:53,329 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2023-02-17 02:50:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 02:50:53,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-02-17 02:50:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:53,331 INFO L225 Difference]: With dead ends: 130 [2023-02-17 02:50:53,331 INFO L226 Difference]: Without dead ends: 130 [2023-02-17 02:50:53,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=243, Unknown=1, NotChecked=32, Total=342 [2023-02-17 02:50:53,331 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 110 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:53,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 399 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 375 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2023-02-17 02:50:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-17 02:50:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 101. [2023-02-17 02:50:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 97 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:50:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2023-02-17 02:50:53,335 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 38 [2023-02-17 02:50:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:53,337 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2023-02-17 02:50:53,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:50:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2023-02-17 02:50:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 02:50:53,339 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:53,339 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:53,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 02:50:53,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:50:53,541 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:50:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:53,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2071966612, now seen corresponding path program 1 times [2023-02-17 02:50:53,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:53,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471751532] [2023-02-17 02:50:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:53,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:53,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:50:53,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950825960] [2023-02-17 02:50:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:53,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:50:53,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:50:53,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:50:53,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 02:50:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:53,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-17 02:50:53,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:50:53,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:50:53,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 02:50:53,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 02:50:53,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:50:53,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 02:50:53,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:50:53,946 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 75 [2023-02-17 02:50:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 02:50:53,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:50:54,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:50:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471751532] [2023-02-17 02:50:54,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:50:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950825960] [2023-02-17 02:50:54,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950825960] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:50:54,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:50:54,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 02:50:54,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301529138] [2023-02-17 02:50:54,062 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:50:54,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 02:50:54,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:50:54,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 02:50:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-02-17 02:50:54,063 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:50:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:50:54,778 INFO L93 Difference]: Finished difference Result 127 states and 134 transitions. [2023-02-17 02:50:54,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 02:50:54,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2023-02-17 02:50:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:50:54,779 INFO L225 Difference]: With dead ends: 127 [2023-02-17 02:50:54,779 INFO L226 Difference]: Without dead ends: 127 [2023-02-17 02:50:54,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-02-17 02:50:54,780 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 221 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 02:50:54,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 446 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 02:50:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-17 02:50:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2023-02-17 02:50:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 62 states have (on average 1.596774193548387) internal successors, (99), 94 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:50:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2023-02-17 02:50:54,783 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 38 [2023-02-17 02:50:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:50:54,783 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2023-02-17 02:50:54,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:50:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2023-02-17 02:50:54,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 02:50:54,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:50:54,784 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:50:54,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 02:50:54,989 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,SelfDestructingSolverStorable8 [2023-02-17 02:50:54,990 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:50:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:50:54,990 INFO L85 PathProgramCache]: Analyzing trace with hash -193544485, now seen corresponding path program 1 times [2023-02-17 02:50:54,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:50:54,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156769895] [2023-02-17 02:50:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:54,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:50:55,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:50:55,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883369041] [2023-02-17 02:50:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:50:55,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:50:55,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:50:55,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:50:55,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 02:50:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:50:55,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-17 02:50:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:50:55,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:51:01,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:51:01,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 02:51:01,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:51:01,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 02:51:01,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:51:01,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 02:51:01,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:51:01,672 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 75 [2023-02-17 02:51:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 02:51:01,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:51:01,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:51:01,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156769895] [2023-02-17 02:51:01,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:51:01,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883369041] [2023-02-17 02:51:01,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883369041] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:51:01,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:51:01,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-17 02:51:01,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013228159] [2023-02-17 02:51:01,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:51:01,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 02:51:01,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:51:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 02:51:01,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=403, Unknown=2, NotChecked=0, Total=462 [2023-02-17 02:51:01,809 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:51:04,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:07,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:10,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:14,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:18,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:22,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:26,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:28,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:30,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:51:31,333 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2023-02-17 02:51:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 02:51:31,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-02-17 02:51:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:51:31,334 INFO L225 Difference]: With dead ends: 114 [2023-02-17 02:51:31,334 INFO L226 Difference]: Without dead ends: 102 [2023-02-17 02:51:31,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=143, Invalid=843, Unknown=6, NotChecked=0, Total=992 [2023-02-17 02:51:31,335 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 52 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 10 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2023-02-17 02:51:31,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 709 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1006 Invalid, 9 Unknown, 0 Unchecked, 19.7s Time] [2023-02-17 02:51:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-17 02:51:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-02-17 02:51:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 98 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:51:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2023-02-17 02:51:31,340 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 39 [2023-02-17 02:51:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:51:31,340 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2023-02-17 02:51:31,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:51:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2023-02-17 02:51:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 02:51:31,342 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:51:31,342 INFO L195 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:51:31,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 02:51:31,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 02:51:31,546 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:51:31,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:51:31,552 INFO L85 PathProgramCache]: Analyzing trace with hash -140823116, now seen corresponding path program 2 times [2023-02-17 02:51:31,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:51:31,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744722483] [2023-02-17 02:51:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:51:31,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:51:31,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:51:31,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176969120] [2023-02-17 02:51:31,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:51:31,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:51:31,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:51:31,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:51:31,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 02:51:31,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:51:31,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:51:31,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-17 02:51:31,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:51:31,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:51:46,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:51:46,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 02:51:46,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 02:51:46,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:51:46,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 02:51:46,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:51:46,285 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 75 [2023-02-17 02:51:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 02:51:46,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:51:46,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:51:46,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744722483] [2023-02-17 02:51:46,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:51:46,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176969120] [2023-02-17 02:51:46,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176969120] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:51:46,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:51:46,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-17 02:51:46,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347034483] [2023-02-17 02:51:46,430 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:51:46,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 02:51:46,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:51:46,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 02:51:46,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=524, Unknown=6, NotChecked=0, Total=600 [2023-02-17 02:51:46,431 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:51:50,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:54,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:51:58,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:52:03,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:52:07,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:52:11,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:52:15,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:52:17,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 02:52:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:52:18,457 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2023-02-17 02:52:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 02:52:18,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2023-02-17 02:52:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:52:18,459 INFO L225 Difference]: With dead ends: 118 [2023-02-17 02:52:18,459 INFO L226 Difference]: Without dead ends: 106 [2023-02-17 02:52:18,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=210, Invalid=1337, Unknown=13, NotChecked=0, Total=1560 [2023-02-17 02:52:18,460 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 75 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 17 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2023-02-17 02:52:18,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 638 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 983 Invalid, 8 Unknown, 0 Unchecked, 17.5s Time] [2023-02-17 02:52:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-17 02:52:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2023-02-17 02:52:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 99 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:52:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2023-02-17 02:52:18,463 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 40 [2023-02-17 02:52:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:52:18,463 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2023-02-17 02:52:18,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:52:18,463 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2023-02-17 02:52:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 02:52:18,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:52:18,464 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:52:18,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 02:52:18,671 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,SelfDestructingSolverStorable10 [2023-02-17 02:52:18,671 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:52:18,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:52:18,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1493539323, now seen corresponding path program 3 times [2023-02-17 02:52:18,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:52:18,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901534650] [2023-02-17 02:52:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:18,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:52:18,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:52:18,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33632195] [2023-02-17 02:52:18,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 02:52:18,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:52:18,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:52:18,688 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:52:18,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 02:52:18,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 02:52:18,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:52:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 02:52:18,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:52:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:52:19,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 02:52:19,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:52:19,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 02:52:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 02:52:19,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:52:19,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:52:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901534650] [2023-02-17 02:52:19,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:52:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33632195] [2023-02-17 02:52:19,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33632195] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:52:19,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:52:19,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 02:52:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064961294] [2023-02-17 02:52:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:52:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 02:52:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:52:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 02:52:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:52:19,044 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 02:52:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:52:19,437 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2023-02-17 02:52:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:52:19,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-02-17 02:52:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:52:19,438 INFO L225 Difference]: With dead ends: 128 [2023-02-17 02:52:19,438 INFO L226 Difference]: Without dead ends: 128 [2023-02-17 02:52:19,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:52:19,439 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 114 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:52:19,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 251 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 02:52:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-17 02:52:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2023-02-17 02:52:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 98 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:52:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2023-02-17 02:52:19,442 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 41 [2023-02-17 02:52:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:52:19,442 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2023-02-17 02:52:19,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 02:52:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2023-02-17 02:52:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 02:52:19,443 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:52:19,443 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:52:19,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 02:52:19,649 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,SelfDestructingSolverStorable11 [2023-02-17 02:52:19,649 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:52:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:52:19,649 INFO L85 PathProgramCache]: Analyzing trace with hash 533443940, now seen corresponding path program 1 times [2023-02-17 02:52:19,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:52:19,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032279538] [2023-02-17 02:52:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:19,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:52:19,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:52:19,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834430262] [2023-02-17 02:52:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:19,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:52:19,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:52:19,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:52:19,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 02:52:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:52:19,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-17 02:52:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:52:19,809 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1030 Int) (|calloc_model_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_1029 Int)) (and (= (store |c_old(#length)| |calloc_model_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1029) |c_#length|) (= (select |c_old(#valid)| |calloc_model_#Ultimate.C_memset_#ptr#1.base|) 0) (= |c_#valid| (store |c_old(#valid)| |calloc_model_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1030)))) is different from true [2023-02-17 02:52:19,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:52:19,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 02:52:19,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:52:19,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 02:52:19,841 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1031 Int) (|calloc_model_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (select |c_old(#valid)| |calloc_model_#Ultimate.C_memset_#ptr#1.base|) 0) (= |c_#length| (store |c_old(#length)| |calloc_model_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1031)))) is different from true [2023-02-17 02:52:19,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:52:19,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 02:52:19,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:52:19,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-17 02:52:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 40 not checked. [2023-02-17 02:52:19,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:52:19,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:52:19,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032279538] [2023-02-17 02:52:19,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:52:19,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834430262] [2023-02-17 02:52:19,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834430262] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:52:19,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:52:19,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-17 02:52:19,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606905933] [2023-02-17 02:52:19,940 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:52:19,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 02:52:19,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:52:19,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 02:52:19,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=65, Unknown=2, NotChecked=34, Total=132 [2023-02-17 02:52:19,941 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 02:52:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:52:20,115 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2023-02-17 02:52:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:52:20,115 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2023-02-17 02:52:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:52:20,116 INFO L225 Difference]: With dead ends: 121 [2023-02-17 02:52:20,116 INFO L226 Difference]: Without dead ends: 121 [2023-02-17 02:52:20,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=132, Unknown=2, NotChecked=50, Total=240 [2023-02-17 02:52:20,117 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 173 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:52:20,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 157 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 196 Invalid, 0 Unknown, 216 Unchecked, 0.1s Time] [2023-02-17 02:52:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-17 02:52:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2023-02-17 02:52:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.5142857142857142) internal successors, (106), 98 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:52:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2023-02-17 02:52:20,120 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 47 [2023-02-17 02:52:20,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:52:20,120 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2023-02-17 02:52:20,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 02:52:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2023-02-17 02:52:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 02:52:20,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:52:20,121 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:52:20,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 02:52:20,330 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,SelfDestructingSolverStorable12 [2023-02-17 02:52:20,330 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:52:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:52:20,331 INFO L85 PathProgramCache]: Analyzing trace with hash 817083216, now seen corresponding path program 1 times [2023-02-17 02:52:20,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:52:20,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163915109] [2023-02-17 02:52:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:52:20,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:52:20,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663652954] [2023-02-17 02:52:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:20,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:52:20,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:52:20,346 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:52:20,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 02:52:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:52:20,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 02:52:20,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:52:20,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 02:52:20,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-17 02:52:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-17 02:52:20,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:52:20,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:52:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163915109] [2023-02-17 02:52:20,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:52:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663652954] [2023-02-17 02:52:20,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663652954] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:52:20,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:52:20,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:52:20,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332989337] [2023-02-17 02:52:20,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:52:20,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 02:52:20,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:52:20,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 02:52:20,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:52:20,534 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 02:52:20,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:52:20,671 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2023-02-17 02:52:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 02:52:20,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2023-02-17 02:52:20,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:52:20,672 INFO L225 Difference]: With dead ends: 122 [2023-02-17 02:52:20,672 INFO L226 Difference]: Without dead ends: 122 [2023-02-17 02:52:20,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:52:20,673 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 124 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:52:20,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 193 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:52:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-17 02:52:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2023-02-17 02:52:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.5) internal successors, (105), 98 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:52:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2023-02-17 02:52:20,676 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 55 [2023-02-17 02:52:20,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:52:20,676 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2023-02-17 02:52:20,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 02:52:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2023-02-17 02:52:20,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 02:52:20,677 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:52:20,677 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:52:20,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 02:52:20,883 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,SelfDestructingSolverStorable13 [2023-02-17 02:52:20,883 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:52:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:52:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash 817083217, now seen corresponding path program 1 times [2023-02-17 02:52:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:52:20,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406094675] [2023-02-17 02:52:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:20,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:52:20,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:52:20,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814405382] [2023-02-17 02:52:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:20,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:52:20,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:52:20,899 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:52:20,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 02:52:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:52:21,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-17 02:52:21,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:52:21,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 02:52:21,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 02:52:21,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-17 02:52:21,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-02-17 02:52:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-17 02:52:21,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:52:21,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:52:21,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406094675] [2023-02-17 02:52:21,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:52:21,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814405382] [2023-02-17 02:52:21,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814405382] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:52:21,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:52:21,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 02:52:21,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977162590] [2023-02-17 02:52:21,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:52:21,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 02:52:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:52:21,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 02:52:21,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:52:21,111 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:52:21,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:52:21,287 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2023-02-17 02:52:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 02:52:21,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2023-02-17 02:52:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:52:21,288 INFO L225 Difference]: With dead ends: 144 [2023-02-17 02:52:21,288 INFO L226 Difference]: Without dead ends: 144 [2023-02-17 02:52:21,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2023-02-17 02:52:21,289 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 261 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:52:21,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 199 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:52:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-17 02:52:21,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2023-02-17 02:52:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 98 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:52:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2023-02-17 02:52:21,292 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 55 [2023-02-17 02:52:21,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:52:21,292 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2023-02-17 02:52:21,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:52:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2023-02-17 02:52:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 02:52:21,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:52:21,292 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:52:21,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 02:52:21,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:52:21,500 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:52:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:52:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2146483025, now seen corresponding path program 1 times [2023-02-17 02:52:21,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:52:21,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683928584] [2023-02-17 02:52:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:21,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:52:21,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:52:21,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584909199] [2023-02-17 02:52:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:21,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:52:21,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:52:21,522 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:52:21,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 02:52:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:52:21,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 02:52:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:52:21,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-17 02:52:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-17 02:52:21,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:52:21,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:52:21,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683928584] [2023-02-17 02:52:21,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:52:21,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584909199] [2023-02-17 02:52:21,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584909199] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:52:21,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:52:21,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:52:21,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224752444] [2023-02-17 02:52:21,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:52:21,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:52:21,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:52:21,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:52:21,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:52:21,721 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 02:52:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:52:21,792 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2023-02-17 02:52:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:52:21,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-02-17 02:52:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:52:21,794 INFO L225 Difference]: With dead ends: 101 [2023-02-17 02:52:21,794 INFO L226 Difference]: Without dead ends: 101 [2023-02-17 02:52:21,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:52:21,794 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 28 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:52:21,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 220 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:52:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-17 02:52:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-17 02:52:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.4714285714285715) internal successors, (103), 97 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:52:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2023-02-17 02:52:21,797 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 58 [2023-02-17 02:52:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:52:21,797 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2023-02-17 02:52:21,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 02:52:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2023-02-17 02:52:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 02:52:21,798 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:52:21,798 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:52:21,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 02:52:22,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-17 02:52:22,005 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:52:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:52:22,005 INFO L85 PathProgramCache]: Analyzing trace with hash 2146483026, now seen corresponding path program 1 times [2023-02-17 02:52:22,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:52:22,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259744891] [2023-02-17 02:52:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:22,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:52:22,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:52:22,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845153198] [2023-02-17 02:52:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:22,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:52:22,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:52:22,025 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:52:22,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 02:52:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:52:22,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-17 02:52:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:52:22,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 02:52:22,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 02:52:22,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-02-17 02:52:22,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-02-17 02:52:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-17 02:52:22,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:52:22,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:52:22,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259744891] [2023-02-17 02:52:22,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:52:22,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845153198] [2023-02-17 02:52:22,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845153198] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:52:22,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:52:22,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 02:52:22,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826171809] [2023-02-17 02:52:22,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:52:22,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 02:52:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:52:22,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 02:52:22,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-17 02:52:22,294 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:52:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:52:22,487 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2023-02-17 02:52:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 02:52:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2023-02-17 02:52:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:52:22,488 INFO L225 Difference]: With dead ends: 141 [2023-02-17 02:52:22,488 INFO L226 Difference]: Without dead ends: 141 [2023-02-17 02:52:22,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2023-02-17 02:52:22,489 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 407 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:52:22,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 209 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:52:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-17 02:52:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 102. [2023-02-17 02:52:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 98 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:52:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2023-02-17 02:52:22,493 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 58 [2023-02-17 02:52:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:52:22,493 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2023-02-17 02:52:22,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:52:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2023-02-17 02:52:22,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-17 02:52:22,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:52:22,494 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:52:22,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 02:52:22,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 02:52:22,704 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-02-17 02:52:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:52:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1185887154, now seen corresponding path program 1 times [2023-02-17 02:52:22,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:52:22,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258295288] [2023-02-17 02:52:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:22,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:52:22,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:52:22,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531984843] [2023-02-17 02:52:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:52:22,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:52:22,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:52:22,720 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:52:22,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 02:52:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:52:22,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-17 02:52:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:52:22,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:52:22,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 02:52:23,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 02:52:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:52:23,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-17 02:52:23,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-17 02:52:23,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 02:52:23,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-02-17 02:52:23,101 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 02:52:23,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:52:23,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:52:23,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 19 [2023-02-17 02:52:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-17 02:52:23,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:52:23,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 103 [2023-02-17 02:52:44,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:52:44,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:52:44,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 738 treesize of output 714