./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0219.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae 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-0219.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 4a489d3e73f8fa53a32414f65b592ba5db703c103e5e16e188592c7c2dfeab95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:10:57,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:10:57,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:10:57,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:10:57,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:10:57,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:10:57,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:10:57,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:10:57,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:10:57,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:10:57,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:10:57,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:10:57,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:10:57,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:10:57,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:10:57,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:10:57,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:10:57,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:10:57,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:10:57,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:10:57,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:10:57,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:10:57,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:10:57,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:10:57,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:10:57,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:10:57,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:10:57,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:10:57,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:10:57,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:10:57,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:10:57,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:10:57,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:10:57,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:10:57,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:10:57,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:10:57,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:10:57,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:10:57,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:10:57,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:10:57,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:10:57,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:10:57,942 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:10:57,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:10:57,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:10:57,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:10:57,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:10:57,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:10:57,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:10:57,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:10:57,945 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:10:57,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:10:57,946 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:10:57,946 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:10:57,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:10:57,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:10:57,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:10:57,947 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:10:57,947 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:10:57,947 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:10:57,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:10:57,947 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:10:57,947 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:10:57,948 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:10:57,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:10:57,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:10:57,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:10:57,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:10:57,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:10:57,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:10:57,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:10:57,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:10:57,950 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:10:57,950 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:10:57,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:10:57,950 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:10:57,950 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a489d3e73f8fa53a32414f65b592ba5db703c103e5e16e188592c7c2dfeab95 [2023-02-16 03:10:58,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:10:58,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:10:58,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:10:58,207 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:10:58,208 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:10:58,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0219.i [2023-02-16 03:10:59,351 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:10:59,592 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:10:59,592 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0219.i [2023-02-16 03:10:59,606 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25a127fb4/99a2013c617d4c47823e1b3c6e1e7ea4/FLAG206cdc10e [2023-02-16 03:10:59,619 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25a127fb4/99a2013c617d4c47823e1b3c6e1e7ea4 [2023-02-16 03:10:59,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:10:59,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:10:59,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:10:59,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:10:59,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:10:59,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:10:59" (1/1) ... [2023-02-16 03:10:59,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ee9683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:10:59, skipping insertion in model container [2023-02-16 03:10:59,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:10:59" (1/1) ... [2023-02-16 03:10:59,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:10:59,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:11:00,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:11:00,033 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:11:00,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:11:00,121 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:11:00,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00 WrapperNode [2023-02-16 03:11:00,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:11:00,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:11:00,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:11:00,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:11:00,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,183 INFO L138 Inliner]: procedures = 180, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 113 [2023-02-16 03:11:00,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:11:00,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:11:00,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:11:00,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:11:00,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,230 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:11:00,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:11:00,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:11:00,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:11:00,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (1/1) ... [2023-02-16 03:11:00,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:11:00,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:00,277 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) [2023-02-16 03:11:00,279 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 [2023-02-16 03:11:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure calloc_model [2023-02-16 03:11:00,308 INFO L138 BoogieDeclarations]: Found implementation of procedure calloc_model [2023-02-16 03:11:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 03:11:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:11:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 03:11:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 03:11:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:11:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-16 03:11:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:11:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:11:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:11:00,406 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:11:00,408 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:11:00,759 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:11:00,769 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:11:00,771 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-16 03:11:00,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:11:00 BoogieIcfgContainer [2023-02-16 03:11:00,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:11:00,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:11:00,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:11:00,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:11:00,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:10:59" (1/3) ... [2023-02-16 03:11:00,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da8b89f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:11:00, skipping insertion in model container [2023-02-16 03:11:00,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:11:00" (2/3) ... [2023-02-16 03:11:00,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da8b89f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:11:00, skipping insertion in model container [2023-02-16 03:11:00,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:11:00" (3/3) ... [2023-02-16 03:11:00,784 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0219.i [2023-02-16 03:11:00,798 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:11:00,798 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-02-16 03:11:00,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:11:00,842 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;@2ce34967, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:11:00,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-02-16 03:11:00,845 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) [2023-02-16 03:11:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:11:00,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:00,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:11:00,851 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)] === [2023-02-16 03:11:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:00,855 INFO L85 PathProgramCache]: Analyzing trace with hash 928072, now seen corresponding path program 1 times [2023-02-16 03:11:00,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:00,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209516095] [2023-02-16 03:11:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:01,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:01,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209516095] [2023-02-16 03:11:01,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209516095] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:01,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:01,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:11:01,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677308529] [2023-02-16 03:11:01,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:01,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 03:11:01,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 03:11:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 03:11:01,036 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) [2023-02-16 03:11:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:01,055 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2023-02-16 03:11:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 03:11:01,057 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 [2023-02-16 03:11:01,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:01,063 INFO L225 Difference]: With dead ends: 109 [2023-02-16 03:11:01,064 INFO L226 Difference]: Without dead ends: 107 [2023-02-16 03:11:01,065 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 [2023-02-16 03:11:01,068 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 [2023-02-16 03:11:01,069 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] [2023-02-16 03:11:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-16 03:11:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-02-16 03:11:01,097 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) [2023-02-16 03:11:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2023-02-16 03:11:01,100 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 4 [2023-02-16 03:11:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:01,101 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2023-02-16 03:11:01,101 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) [2023-02-16 03:11:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2023-02-16 03:11:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:11:01,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:01,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:11:01,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:11:01,102 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)] === [2023-02-16 03:11:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash 889700811, now seen corresponding path program 1 times [2023-02-16 03:11:01,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:01,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794002664] [2023-02-16 03:11:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:01,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:01,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:11:01,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413025337] [2023-02-16 03:11:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:01,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:01,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:01,125 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) [2023-02-16 03:11:01,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:11:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:01,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 03:11:01,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:11:01,262 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 [2023-02-16 03:11:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:01,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:11:01,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:01,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794002664] [2023-02-16 03:11:01,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:11:01,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413025337] [2023-02-16 03:11:01,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413025337] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:01,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:01,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:11:01,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063458861] [2023-02-16 03:11:01,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:01,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:11:01,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:11:01,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:11:01,291 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) [2023-02-16 03:11:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:01,405 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2023-02-16 03:11:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:11:01,408 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 [2023-02-16 03:11:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:01,409 INFO L225 Difference]: With dead ends: 106 [2023-02-16 03:11:01,409 INFO L226 Difference]: Without dead ends: 106 [2023-02-16 03:11:01,409 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 [2023-02-16 03:11:01,410 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 [2023-02-16 03:11:01,411 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] [2023-02-16 03:11:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-16 03:11:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-02-16 03:11:01,427 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) [2023-02-16 03:11:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2023-02-16 03:11:01,432 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 6 [2023-02-16 03:11:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:01,433 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2023-02-16 03:11:01,433 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) [2023-02-16 03:11:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2023-02-16 03:11:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 03:11:01,434 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:01,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:11:01,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 03:11:01,639 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 [2023-02-16 03:11:01,640 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)] === [2023-02-16 03:11:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:01,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1810921558, now seen corresponding path program 1 times [2023-02-16 03:11:01,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:01,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286845632] [2023-02-16 03:11:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:01,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:01,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:11:01,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106023942] [2023-02-16 03:11:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:01,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:01,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:01,672 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) [2023-02-16 03:11:01,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:11:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:01,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 03:11:01,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:11:01,776 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 [2023-02-16 03:11:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:11:01,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:11:01,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:01,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286845632] [2023-02-16 03:11:01,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:11:01,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106023942] [2023-02-16 03:11:01,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106023942] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:01,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:01,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:11:01,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792937352] [2023-02-16 03:11:01,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:01,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:11:01,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:01,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:11:01,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:11:01,802 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) [2023-02-16 03:11:01,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:01,911 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2023-02-16 03:11:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:11:01,911 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 [2023-02-16 03:11:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:01,915 INFO L225 Difference]: With dead ends: 105 [2023-02-16 03:11:01,915 INFO L226 Difference]: Without dead ends: 105 [2023-02-16 03:11:01,916 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 [2023-02-16 03:11:01,919 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 [2023-02-16 03:11:01,919 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] [2023-02-16 03:11:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-16 03:11:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-16 03:11:01,935 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) [2023-02-16 03:11:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2023-02-16 03:11:01,938 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 7 [2023-02-16 03:11:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:01,938 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2023-02-16 03:11:01,938 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) [2023-02-16 03:11:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2023-02-16 03:11:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 03:11:01,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:01,942 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] [2023-02-16 03:11:01,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:11:02,148 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 [2023-02-16 03:11:02,149 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)] === [2023-02-16 03:11:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:02,150 INFO L85 PathProgramCache]: Analyzing trace with hash -713444144, now seen corresponding path program 1 times [2023-02-16 03:11:02,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:02,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588319253] [2023-02-16 03:11:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:02,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:02,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:11:02,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305167230] [2023-02-16 03:11:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:02,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:02,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:02,188 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) [2023-02-16 03:11:02,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:11:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:02,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 03:11:02,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:11:02,368 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:11:02,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:11:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:11:02,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:11:02,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:02,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588319253] [2023-02-16 03:11:02,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:11:02,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305167230] [2023-02-16 03:11:02,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305167230] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:02,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:02,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:11:02,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705340510] [2023-02-16 03:11:02,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:02,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:11:02,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:02,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:11:02,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:11:02,383 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) [2023-02-16 03:11:02,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:02,616 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2023-02-16 03:11:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:11:02,617 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 [2023-02-16 03:11:02,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:02,619 INFO L225 Difference]: With dead ends: 132 [2023-02-16 03:11:02,620 INFO L226 Difference]: Without dead ends: 132 [2023-02-16 03:11:02,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:11:02,623 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 69 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:02,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 344 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:11:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-16 03:11:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2023-02-16 03:11:02,634 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) [2023-02-16 03:11:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2023-02-16 03:11:02,635 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 26 [2023-02-16 03:11:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:02,636 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2023-02-16 03:11:02,636 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) [2023-02-16 03:11:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2023-02-16 03:11:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 03:11:02,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:02,639 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] [2023-02-16 03:11:02,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 03:11:02,845 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 [2023-02-16 03:11:02,846 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)] === [2023-02-16 03:11:02,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:02,846 INFO L85 PathProgramCache]: Analyzing trace with hash -713444143, now seen corresponding path program 1 times [2023-02-16 03:11:02,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:02,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944559347] [2023-02-16 03:11:02,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:02,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:02,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:11:02,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347989641] [2023-02-16 03:11:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:02,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:02,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:02,861 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) [2023-02-16 03:11:02,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:11:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 03:11:02,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:11:02,982 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 [2023-02-16 03:11:03,114 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 15 treesize of output 11 [2023-02-16 03:11:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:11:07,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:11:07,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:07,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944559347] [2023-02-16 03:11:07,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:11:07,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347989641] [2023-02-16 03:11:07,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347989641] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:11:07,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:11:07,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:11:07,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993070716] [2023-02-16 03:11:07,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:11:07,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:11:07,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:07,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:11:07,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=11, Unknown=2, NotChecked=0, Total=20 [2023-02-16 03:11:07,338 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), 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) [2023-02-16 03:11:09,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:11:13,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:11:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:17,819 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2023-02-16 03:11:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:11:17,820 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), 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 [2023-02-16 03:11:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:17,821 INFO L225 Difference]: With dead ends: 106 [2023-02-16 03:11:17,821 INFO L226 Difference]: Without dead ends: 103 [2023-02-16 03:11:17,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=17, Invalid=21, Unknown=4, NotChecked=0, Total=42 [2023-02-16 03:11:17,822 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 12 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:17,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 353 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-02-16 03:11:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-16 03:11:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-02-16 03:11:17,825 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) [2023-02-16 03:11:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2023-02-16 03:11:17,826 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 26 [2023-02-16 03:11:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:17,826 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2023-02-16 03:11:17,826 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), 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) [2023-02-16 03:11:17,826 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2023-02-16 03:11:17,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 03:11:17,827 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:17,827 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] [2023-02-16 03:11:17,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:11:18,027 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 [2023-02-16 03:11:18,028 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)] === [2023-02-16 03:11:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1474338645, now seen corresponding path program 1 times [2023-02-16 03:11:18,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:18,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160722246] [2023-02-16 03:11:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:18,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:18,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:11:18,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648277164] [2023-02-16 03:11:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:18,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:18,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:18,074 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) [2023-02-16 03:11:18,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:11:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:11:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 03:11:18,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:11:18,221 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 [2023-02-16 03:11:18,281 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 15 treesize of output 11 [2023-02-16 03:11:20,513 WARN L859 $PredicateComparison]: unable to prove that (exists ((|calloc_model_~size#1| Int)) (let ((.cse0 (* |c_calloc_model_#in~nmemb#1| |calloc_model_~size#1|))) (let ((.cse1 (mod .cse0 4294967296))) (and (<= .cse0 .cse1) (<= |c_calloc_model_#in~size#1| |calloc_model_~size#1|) (not (< 1 .cse1)))))) is different from true [2023-02-16 03:11:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:11:20,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:11:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:11:20,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:11:20,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160722246] [2023-02-16 03:11:20,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:11:20,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648277164] [2023-02-16 03:11:20,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648277164] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:11:20,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:11:20,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-02-16 03:11:20,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146048647] [2023-02-16 03:11:20,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:11:20,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 03:11:20,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:11:20,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 03:11:20,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=63, Unknown=1, NotChecked=16, Total=110 [2023-02-16 03:11:20,955 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) [2023-02-16 03:11:29,335 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 33 DAG size of output: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:11:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:11:29,780 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2023-02-16 03:11:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:11:29,781 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 [2023-02-16 03:11:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:11:29,781 INFO L225 Difference]: With dead ends: 112 [2023-02-16 03:11:29,781 INFO L226 Difference]: Without dead ends: 106 [2023-02-16 03:11:29,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=82, Invalid=161, Unknown=1, NotChecked=28, Total=272 [2023-02-16 03:11:29,782 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 26 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:11:29,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 551 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2023-02-16 03:11:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-16 03:11:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-02-16 03:11:29,786 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) [2023-02-16 03:11:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2023-02-16 03:11:29,787 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 28 [2023-02-16 03:11:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:11:29,787 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2023-02-16 03:11:29,787 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) [2023-02-16 03:11:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2023-02-16 03:11:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-16 03:11:29,788 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:11:29,788 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] [2023-02-16 03:11:29,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:11:29,996 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 [2023-02-16 03:11:29,996 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)] === [2023-02-16 03:11:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:11:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1774687953, now seen corresponding path program 2 times [2023-02-16 03:11:29,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:11:29,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361429356] [2023-02-16 03:11:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:11:29,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:11:30,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:11:30,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809981378] [2023-02-16 03:11:30,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:11:30,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:11:30,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:11:30,019 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) [2023-02-16 03:11:30,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:11:30,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:11:30,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:11:30,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-16 03:11:30,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:11:30,222 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 [2023-02-16 03:11:44,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:11:44,504 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 [2023-02-16 03:11:44,510 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:11:44,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-16 03:11:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:11:44,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:11:51,039 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:11:57,283 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:12:03,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:12:03,277 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 [2023-02-16 03:12:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 03:12:03,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:12:03,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361429356] [2023-02-16 03:12:03,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:12:03,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809981378] [2023-02-16 03:12:03,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809981378] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:12:03,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:12:03,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2023-02-16 03:12:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512006590] [2023-02-16 03:12:03,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:12:03,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 03:12:03,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:12:03,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 03:12:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=605, Unknown=6, NotChecked=0, Total=702 [2023-02-16 03:12:03,514 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) [2023-02-16 03:12:05,617 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] [2023-02-16 03:12:20,952 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] [2023-02-16 03:12:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:12:21,022 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2023-02-16 03:12:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 03:12:21,022 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 [2023-02-16 03:12:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:12:21,023 INFO L225 Difference]: With dead ends: 134 [2023-02-16 03:12:21,023 INFO L226 Difference]: Without dead ends: 134 [2023-02-16 03:12:21,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=183, Invalid=1001, Unknown=6, NotChecked=0, Total=1190 [2023-02-16 03:12:21,024 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 203 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:12:21,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 793 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1182 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2023-02-16 03:12:21,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-16 03:12:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2023-02-16 03:12:21,035 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) [2023-02-16 03:12:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2023-02-16 03:12:21,036 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 34 [2023-02-16 03:12:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:12:21,036 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2023-02-16 03:12:21,036 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) [2023-02-16 03:12:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2023-02-16 03:12:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-16 03:12:21,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:12:21,037 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] [2023-02-16 03:12:21,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 03:12:21,241 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 [2023-02-16 03:12:21,241 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)] === [2023-02-16 03:12:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:12:21,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2071966611, now seen corresponding path program 1 times [2023-02-16 03:12:21,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:12:21,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838475441] [2023-02-16 03:12:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:21,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:12:21,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:12:21,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530868870] [2023-02-16 03:12:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:21,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:12:21,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:12:21,275 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) [2023-02-16 03:12:21,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:12:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:21,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-16 03:12:21,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:12:21,457 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_309 Int)) (= |c_#valid| (store |c_old(#valid)| |c_calloc_model_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_309))) is different from true [2023-02-16 03:12:21,526 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:12:21,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-16 03:12:21,546 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:12:21,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-16 03:12:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 1 not checked. [2023-02-16 03:12:21,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:12:21,801 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-16 03:12:21,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 03:12:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-16 03:12:21,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:12:21,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838475441] [2023-02-16 03:12:21,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:12:21,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530868870] [2023-02-16 03:12:21,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530868870] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:12:21,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:12:21,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2023-02-16 03:12:21,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585660158] [2023-02-16 03:12:21,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:12:21,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 03:12:21,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:12:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 03:12:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-02-16 03:12:21,808 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) [2023-02-16 03:12:22,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:12:22,297 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2023-02-16 03:12:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 03:12:22,297 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 [2023-02-16 03:12:22,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:12:22,298 INFO L225 Difference]: With dead ends: 134 [2023-02-16 03:12:22,298 INFO L226 Difference]: Without dead ends: 134 [2023-02-16 03:12:22,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=243, Unknown=1, NotChecked=32, Total=342 [2023-02-16 03:12:22,299 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 118 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 10 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:12:22,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 539 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 481 Invalid, 24 Unknown, 131 Unchecked, 0.4s Time] [2023-02-16 03:12:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-16 03:12:22,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2023-02-16 03:12:22,302 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) [2023-02-16 03:12:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2023-02-16 03:12:22,303 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 38 [2023-02-16 03:12:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:12:22,303 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2023-02-16 03:12:22,303 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) [2023-02-16 03:12:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2023-02-16 03:12:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-16 03:12:22,304 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:12:22,304 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] [2023-02-16 03:12:22,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:12:22,510 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 [2023-02-16 03:12:22,511 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)] === [2023-02-16 03:12:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:12:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2071966612, now seen corresponding path program 1 times [2023-02-16 03:12:22,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:12:22,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150971235] [2023-02-16 03:12:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:22,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:12:22,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:12:22,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476222288] [2023-02-16 03:12:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:22,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:12:22,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:12:22,543 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) [2023-02-16 03:12:22,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:12:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-16 03:12:22,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:12:22,741 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 10 treesize of output 9 [2023-02-16 03:12:23,715 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:12:23,715 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 17 treesize of output 21 [2023-02-16 03:12:23,741 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:12:23,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:12:23,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:23,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-02-16 03:12:23,871 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-16 03:12:23,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:12:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-16 03:12:23,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:12:29,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:12:29,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150971235] [2023-02-16 03:12:29,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:12:29,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476222288] [2023-02-16 03:12:29,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476222288] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:12:29,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:12:29,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-16 03:12:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636507098] [2023-02-16 03:12:29,073 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 03:12:29,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 03:12:29,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:12:29,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 03:12:29,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:12:29,074 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) [2023-02-16 03:12:31,108 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] [2023-02-16 03:12:40,624 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 45 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:12:44,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:12:44,647 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2023-02-16 03:12:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 03:12:44,648 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 [2023-02-16 03:12:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:12:44,648 INFO L225 Difference]: With dead ends: 131 [2023-02-16 03:12:44,648 INFO L226 Difference]: Without dead ends: 131 [2023-02-16 03:12:44,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=117, Invalid=532, Unknown=1, NotChecked=0, Total=650 [2023-02-16 03:12:44,649 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 233 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:12:44,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 443 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 785 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-02-16 03:12:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-16 03:12:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2023-02-16 03:12:44,652 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) [2023-02-16 03:12:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2023-02-16 03:12:44,653 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 38 [2023-02-16 03:12:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:12:44,653 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2023-02-16 03:12:44,653 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) [2023-02-16 03:12:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2023-02-16 03:12:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 03:12:44,654 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:12:44,655 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] [2023-02-16 03:12:44,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:12:44,862 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 [2023-02-16 03:12:44,862 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)] === [2023-02-16 03:12:44,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:12:44,863 INFO L85 PathProgramCache]: Analyzing trace with hash -193544485, now seen corresponding path program 1 times [2023-02-16 03:12:44,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:12:44,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626009192] [2023-02-16 03:12:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:44,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:12:44,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:12:44,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730518800] [2023-02-16 03:12:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:12:44,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:12:44,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:12:44,881 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) [2023-02-16 03:12:44,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:12:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:12:45,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-16 03:12:45,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:12:45,084 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 [2023-02-16 03:12:45,096 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 0 case distinctions, treesize of input 12 treesize of output 9 [2023-02-16 03:12:56,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:56,115 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 [2023-02-16 03:12:56,134 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:12:56,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:12:56,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:12:56,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:12:56,335 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-16 03:12:56,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:12:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 03:12:56,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:12:56,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:12:56,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626009192] [2023-02-16 03:12:56,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:12:56,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730518800] [2023-02-16 03:12:56,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730518800] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:12:56,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:12:56,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-16 03:12:56,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352861761] [2023-02-16 03:12:56,757 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 03:12:56,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-16 03:12:56,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:12:56,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-16 03:12:56,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=401, Unknown=4, NotChecked=0, Total=462 [2023-02-16 03:12:56,758 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) [2023-02-16 03:12:58,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:13:00,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:13:07,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:13:09,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:13:15,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:13:17,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:13:19,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:13:26,109 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 46 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:13:28,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:13:38,972 WARN L233 SmtUtils]: Spent 10.81s on a formula simplification. DAG size of input: 55 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:13:40,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:13:42,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:13:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:13:47,824 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2023-02-16 03:13:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 03:13:47,825 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 [2023-02-16 03:13:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:13:47,826 INFO L225 Difference]: With dead ends: 114 [2023-02-16 03:13:47,826 INFO L226 Difference]: Without dead ends: 102 [2023-02-16 03:13:47,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=143, Invalid=843, Unknown=6, NotChecked=0, Total=992 [2023-02-16 03:13:47,827 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 56 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 10 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:13:47,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 527 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 709 Invalid, 10 Unknown, 0 Unchecked, 21.3s Time] [2023-02-16 03:13:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-16 03:13:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-02-16 03:13:47,831 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) [2023-02-16 03:13:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2023-02-16 03:13:47,831 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 39 [2023-02-16 03:13:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:13:47,832 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2023-02-16 03:13:47,832 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) [2023-02-16 03:13:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2023-02-16 03:13:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 03:13:47,833 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:13:47,833 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] [2023-02-16 03:13:47,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:13:48,042 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 [2023-02-16 03:13:48,042 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)] === [2023-02-16 03:13:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:13:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash -140823116, now seen corresponding path program 2 times [2023-02-16 03:13:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:13:48,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874453258] [2023-02-16 03:13:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:13:48,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:13:48,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:13:48,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689651948] [2023-02-16 03:13:48,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:13:48,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:13:48,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:13:48,063 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) [2023-02-16 03:13:48,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:13:48,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:13:48,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:13:48,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-16 03:13:48,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:13:48,252 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 [2023-02-16 03:13:48,260 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 [2023-02-16 03:13:57,288 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:13:57,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:13:57,297 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 [2023-02-16 03:13:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:13:57,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:13:57,486 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-16 03:13:57,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:13:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 03:13:57,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:13:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:13:57,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874453258] [2023-02-16 03:13:57,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:13:57,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689651948] [2023-02-16 03:13:57,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689651948] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:13:57,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:13:57,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-16 03:13:57,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777787201] [2023-02-16 03:13:57,834 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 03:13:57,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-16 03:13:57,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:13:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-16 03:13:57,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=481, Unknown=3, NotChecked=0, Total=552 [2023-02-16 03:13:57,835 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 18 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) [2023-02-16 03:13:59,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:03,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:06,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:10,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:12,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:16,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:20,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:22,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:29,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:39,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:45,853 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 61 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:14:47,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:49,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-16 03:14:53,984 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] [2023-02-16 03:15:01,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:15:01,160 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2023-02-16 03:15:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-16 03:15:01,160 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 18 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 [2023-02-16 03:15:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:15:01,161 INFO L225 Difference]: With dead ends: 118 [2023-02-16 03:15:01,161 INFO L226 Difference]: Without dead ends: 106 [2023-02-16 03:15:01,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=196, Invalid=1278, Unknown=8, NotChecked=0, Total=1482 [2023-02-16 03:15:01,162 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 57 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 19 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:15:01,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 580 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 929 Invalid, 13 Unknown, 0 Unchecked, 27.6s Time] [2023-02-16 03:15:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-16 03:15:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2023-02-16 03:15:01,165 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) [2023-02-16 03:15:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2023-02-16 03:15:01,165 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 40 [2023-02-16 03:15:01,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:15:01,166 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2023-02-16 03:15:01,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 18 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) [2023-02-16 03:15:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2023-02-16 03:15:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-16 03:15:01,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:15:01,166 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] [2023-02-16 03:15:01,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-16 03:15:01,376 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 [2023-02-16 03:15:01,377 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)] === [2023-02-16 03:15:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:15:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1493539323, now seen corresponding path program 3 times [2023-02-16 03:15:01,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:15:01,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601163191] [2023-02-16 03:15:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:01,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:15:01,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:15:01,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111601052] [2023-02-16 03:15:01,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:15:01,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:15:01,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:15:01,392 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) [2023-02-16 03:15:01,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:15:01,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 03:15:01,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:15:01,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-16 03:15:01,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:15:01,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:15:01,822 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 [2023-02-16 03:15:01,831 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:15:01,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-16 03:15:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-16 03:15:01,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:15:01,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:15:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601163191] [2023-02-16 03:15:01,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:15:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111601052] [2023-02-16 03:15:01,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111601052] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:15:01,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:15:01,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 03:15:01,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709551593] [2023-02-16 03:15:01,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:15:01,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:15:01,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:15:01,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:15:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:15:01,858 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) [2023-02-16 03:15:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:15:02,228 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2023-02-16 03:15:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:15:02,229 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 [2023-02-16 03:15:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:15:02,230 INFO L225 Difference]: With dead ends: 132 [2023-02-16 03:15:02,230 INFO L226 Difference]: Without dead ends: 132 [2023-02-16 03:15:02,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:15:02,231 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 118 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:15:02,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 249 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:15:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-16 03:15:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2023-02-16 03:15:02,234 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) [2023-02-16 03:15:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2023-02-16 03:15:02,235 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 41 [2023-02-16 03:15:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:15:02,235 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2023-02-16 03:15:02,235 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) [2023-02-16 03:15:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2023-02-16 03:15:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-16 03:15:02,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:15:02,236 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] [2023-02-16 03:15:02,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 03:15:02,442 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 [2023-02-16 03:15:02,443 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)] === [2023-02-16 03:15:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:15:02,443 INFO L85 PathProgramCache]: Analyzing trace with hash 533443940, now seen corresponding path program 1 times [2023-02-16 03:15:02,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:15:02,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033824172] [2023-02-16 03:15:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:02,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:15:02,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:15:02,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301858978] [2023-02-16 03:15:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:02,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:15:02,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:15:02,460 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) [2023-02-16 03:15:02,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 03:15:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:15:02,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-16 03:15:02,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:15:02,671 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1031 Int) (v_ArrVal_1032 Int) (|calloc_model_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |calloc_model_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1031)) (= |c_#valid| (store |c_old(#valid)| |calloc_model_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1032)) (= 0 (select |c_old(#valid)| |calloc_model_#Ultimate.C_memset_#ptr#1.base|)))) is different from true [2023-02-16 03:15:02,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:15:02,743 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 [2023-02-16 03:15:02,757 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:15:02,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:15:02,788 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1033 Int) (|calloc_model_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |calloc_model_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1033)) (= 0 (select |c_old(#valid)| |calloc_model_#Ultimate.C_memset_#ptr#1.base|)))) is different from true [2023-02-16 03:15:02,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:15:02,833 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 [2023-02-16 03:15:02,887 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:15:02,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-02-16 03:15:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 40 not checked. [2023-02-16 03:15:03,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:15:03,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:15:03,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033824172] [2023-02-16 03:15:03,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:15:03,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301858978] [2023-02-16 03:15:03,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301858978] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:15:03,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:15:03,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-16 03:15:03,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839753379] [2023-02-16 03:15:03,183 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 03:15:03,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:15:03,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:15:03,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:15:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=65, Unknown=2, NotChecked=34, Total=132 [2023-02-16 03:15:03,185 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) [2023-02-16 03:15:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:15:03,429 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2023-02-16 03:15:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:15:03,429 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 [2023-02-16 03:15:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:15:03,430 INFO L225 Difference]: With dead ends: 125 [2023-02-16 03:15:03,430 INFO L226 Difference]: Without dead ends: 125 [2023-02-16 03:15:03,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=132, Unknown=2, NotChecked=50, Total=240 [2023-02-16 03:15:03,431 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 185 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:15:03,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 156 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 197 Invalid, 0 Unknown, 184 Unchecked, 0.2s Time] [2023-02-16 03:15:03,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-16 03:15:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2023-02-16 03:15:03,434 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) [2023-02-16 03:15:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2023-02-16 03:15:03,434 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 47 [2023-02-16 03:15:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:15:03,435 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2023-02-16 03:15:03,435 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) [2023-02-16 03:15:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2023-02-16 03:15:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-16 03:15:03,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:15:03,436 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] [2023-02-16 03:15:03,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 03:15:03,641 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 [2023-02-16 03:15:03,641 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)] === [2023-02-16 03:15:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:15:03,641 INFO L85 PathProgramCache]: Analyzing trace with hash 817083216, now seen corresponding path program 1 times [2023-02-16 03:15:03,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:15:03,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352986652] [2023-02-16 03:15:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:15:03,658 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:15:03,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998156443] [2023-02-16 03:15:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:03,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:15:03,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:15:03,660 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) [2023-02-16 03:15:03,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 03:15:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:15:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-16 03:15:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:15:04,036 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 [2023-02-16 03:15:04,062 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 [2023-02-16 03:15:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-16 03:15:04,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:15:04,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:15:04,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352986652] [2023-02-16 03:15:04,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:15:04,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998156443] [2023-02-16 03:15:04,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998156443] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:15:04,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:15:04,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:15:04,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780643331] [2023-02-16 03:15:04,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:15:04,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:15:04,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:15:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:15:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:15:04,073 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) [2023-02-16 03:15:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:15:04,270 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2023-02-16 03:15:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:15:04,270 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 [2023-02-16 03:15:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:15:04,271 INFO L225 Difference]: With dead ends: 126 [2023-02-16 03:15:04,271 INFO L226 Difference]: Without dead ends: 126 [2023-02-16 03:15:04,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:15:04,272 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 136 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:15:04,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 191 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:15:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-16 03:15:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2023-02-16 03:15:04,275 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) [2023-02-16 03:15:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2023-02-16 03:15:04,275 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 55 [2023-02-16 03:15:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:15:04,275 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2023-02-16 03:15:04,276 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) [2023-02-16 03:15:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2023-02-16 03:15:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-16 03:15:04,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:15:04,276 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] [2023-02-16 03:15:04,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-16 03:15:04,482 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 [2023-02-16 03:15:04,482 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)] === [2023-02-16 03:15:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:15:04,483 INFO L85 PathProgramCache]: Analyzing trace with hash 817083217, now seen corresponding path program 1 times [2023-02-16 03:15:04,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:15:04,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894495116] [2023-02-16 03:15:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:04,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:15:04,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:15:04,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983948713] [2023-02-16 03:15:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:04,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:15:04,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:15:04,499 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) [2023-02-16 03:15:04,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 03:15:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:15:04,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-16 03:15:04,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:15:05,021 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 [2023-02-16 03:15:05,025 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 [2023-02-16 03:15:05,074 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 [2023-02-16 03:15:05,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-02-16 03:15:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-16 03:15:05,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:15:05,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:15:05,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894495116] [2023-02-16 03:15:05,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:15:05,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983948713] [2023-02-16 03:15:05,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983948713] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:15:05,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:15:05,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:15:05,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766712645] [2023-02-16 03:15:05,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:15:05,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:15:05,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:15:05,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:15:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:15:05,094 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) [2023-02-16 03:15:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:15:05,387 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2023-02-16 03:15:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:15:05,388 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 [2023-02-16 03:15:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:15:05,389 INFO L225 Difference]: With dead ends: 144 [2023-02-16 03:15:05,389 INFO L226 Difference]: Without dead ends: 144 [2023-02-16 03:15:05,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2023-02-16 03:15:05,390 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 362 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:15:05,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 187 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:15:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-16 03:15:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2023-02-16 03:15:05,393 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) [2023-02-16 03:15:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2023-02-16 03:15:05,394 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 55 [2023-02-16 03:15:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:15:05,394 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2023-02-16 03:15:05,394 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) [2023-02-16 03:15:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2023-02-16 03:15:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 03:15:05,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:15:05,395 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] [2023-02-16 03:15:05,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-16 03:15:05,601 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 [2023-02-16 03:15:05,601 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)] === [2023-02-16 03:15:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:15:05,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2146483025, now seen corresponding path program 1 times [2023-02-16 03:15:05,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:15:05,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788672589] [2023-02-16 03:15:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:05,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:15:05,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:15:05,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296988839] [2023-02-16 03:15:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:05,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:15:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:15:05,645 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) [2023-02-16 03:15:05,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 03:15:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:15:05,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 03:15:05,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:15:05,840 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 [2023-02-16 03:15:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-16 03:15:05,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:15:05,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:15:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788672589] [2023-02-16 03:15:05,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:15:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296988839] [2023-02-16 03:15:05,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296988839] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:15:05,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:15:05,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:15:05,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296717445] [2023-02-16 03:15:05,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:15:05,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:15:05,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:15:05,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:15:05,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:15:05,847 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) [2023-02-16 03:15:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:15:05,942 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2023-02-16 03:15:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:15:05,942 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 [2023-02-16 03:15:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:15:05,943 INFO L225 Difference]: With dead ends: 114 [2023-02-16 03:15:05,943 INFO L226 Difference]: Without dead ends: 114 [2023-02-16 03:15:05,943 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 [2023-02-16 03:15:05,944 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 36 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:15:05,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 227 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:15:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-16 03:15:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2023-02-16 03:15:05,952 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) [2023-02-16 03:15:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2023-02-16 03:15:05,953 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 58 [2023-02-16 03:15:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:15:05,954 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2023-02-16 03:15:05,954 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) [2023-02-16 03:15:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2023-02-16 03:15:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 03:15:05,958 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:15:05,958 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] [2023-02-16 03:15:05,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 03:15:06,164 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 [2023-02-16 03:15:06,165 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)] === [2023-02-16 03:15:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:15:06,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2146483026, now seen corresponding path program 1 times [2023-02-16 03:15:06,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:15:06,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111533381] [2023-02-16 03:15:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:06,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:15:06,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:15:06,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933695115] [2023-02-16 03:15:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:06,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:15:06,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:15:06,181 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) [2023-02-16 03:15:06,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 03:15:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:15:06,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-16 03:15:06,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:15:06,764 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 [2023-02-16 03:15:06,768 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 [2023-02-16 03:15:06,826 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 [2023-02-16 03:15:06,828 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 [2023-02-16 03:15:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-16 03:15:06,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:15:06,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:15:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111533381] [2023-02-16 03:15:06,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 03:15:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933695115] [2023-02-16 03:15:06,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933695115] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:15:06,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:15:06,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:15:06,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163518616] [2023-02-16 03:15:06,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:15:06,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:15:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:15:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:15:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:15:06,840 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 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) [2023-02-16 03:15:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:15:07,134 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2023-02-16 03:15:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:15:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 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 [2023-02-16 03:15:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:15:07,136 INFO L225 Difference]: With dead ends: 141 [2023-02-16 03:15:07,136 INFO L226 Difference]: Without dead ends: 141 [2023-02-16 03:15:07,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2023-02-16 03:15:07,136 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 271 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:15:07,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 199 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:15:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-16 03:15:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 102. [2023-02-16 03:15:07,139 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) [2023-02-16 03:15:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2023-02-16 03:15:07,140 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 58 [2023-02-16 03:15:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:15:07,140 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2023-02-16 03:15:07,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 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) [2023-02-16 03:15:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2023-02-16 03:15:07,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-16 03:15:07,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:15:07,141 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] [2023-02-16 03:15:07,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 03:15:07,345 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 [2023-02-16 03:15:07,345 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)] === [2023-02-16 03:15:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:15:07,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1185887157, now seen corresponding path program 1 times [2023-02-16 03:15:07,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:15:07,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385103586] [2023-02-16 03:15:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:07,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:15:07,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 03:15:07,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340897517] [2023-02-16 03:15:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:15:07,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:15:07,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:15:07,362 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) [2023-02-16 03:15:07,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 03:15:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:15:07,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-16 03:15:07,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:15:07,715 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:15:07,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-16 03:15:08,030 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 [2023-02-16 03:15:08,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:15:08,127 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 [2023-02-16 03:15:08,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 03:15:08,154 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 [2023-02-16 03:15:08,266 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 [2023-02-16 03:15:08,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:15:08,292 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:15:08,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:15:08,296 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 35 treesize of output 19 [2023-02-16 03:15:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-16 03:15:08,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:15:08,437 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 [2023-02-16 03:15:14,902 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 45 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:15:16,970 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l1_insert_~item~1#1.base|))) (let ((.cse0 (forall ((v_ArrVal_2010 Int) (v_arrayElimCell_59 Int)) (or (< v_arrayElimCell_59 0) (= 1 (select |c_#valid| (select (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l1_insert_~item~1#1.base| (store .cse4 |c_ULTIMATE.start_l1_insert_~item~1#1.offset| v_ArrVal_2010)))) (store .cse6 |c_ULTIMATE.start_l1_insert_~list#1.base| (store (select .cse6 |c_ULTIMATE.start_l1_insert_~list#1.base|) |c_ULTIMATE.start_l1_insert_~list#1.offset| |c_ULTIMATE.start_l1_insert_~item~1#1.base|))))) (select .cse5 (select (select .cse5 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ v_arrayElimCell_59 4)))))))) (and (or (= |c_~#list~0.offset| |c_ULTIMATE.start_l1_insert_~list#1.offset|) .cse0) (or (= |c_~#list~0.base| |c_ULTIMATE.start_l1_insert_~list#1.base|) .cse0) (forall ((v_arrayElimCell_59 Int)) (or (< v_arrayElimCell_59 0) (forall ((v_ArrVal_2010 Int)) (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l1_insert_~item~1#1.base| (store .cse4 |c_ULTIMATE.start_l1_insert_~item~1#1.offset| v_ArrVal_2010)))) (store .cse3 |c_ULTIMATE.start_l1_insert_~list#1.base| (store (select .cse3 |c_ULTIMATE.start_l1_insert_~list#1.base|) |c_ULTIMATE.start_l1_insert_~list#1.offset| |c_ULTIMATE.start_l1_insert_~item~1#1.base|))))) (select .cse2 (select (select .cse2 |c_~#list~0.base|) |c_~#list~0.offset|))))) (or (forall ((v_ArrVal_2015 Int)) (or (not (<= v_ArrVal_2015 |c_ULTIMATE.start_l1_insert_~item~1#1.offset|)) (< v_ArrVal_2015 0) (= 1 (select |c_#valid| (select .cse1 (+ v_ArrVal_2015 4)))))) (= 1 (select |c_#valid| (select .cse1 (+ v_arrayElimCell_59 4)))))))))))) is different from false [2023-02-16 03:15:17,133 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:15:17,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:15:17,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 5477 treesize of output 5184