./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c -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 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 02:44:47,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 02:44:47,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 02:44:47,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 02:44:47,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 02:44:47,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 02:44:47,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 02:44:47,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 02:44:47,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 02:44:47,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 02:44:47,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 02:44:47,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 02:44:47,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 02:44:47,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 02:44:47,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 02:44:47,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 02:44:47,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 02:44:47,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 02:44:47,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 02:44:47,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 02:44:47,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 02:44:47,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 02:44:47,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 02:44:47,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 02:44:47,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 02:44:47,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 02:44:47,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 02:44:47,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 02:44:47,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 02:44:47,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 02:44:47,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 02:44:47,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 02:44:47,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 02:44:47,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 02:44:47,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 02:44:47,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 02:44:47,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 02:44:47,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 02:44:47,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 02:44:47,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 02:44:47,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 02:44:47,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 02:44:47,267 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 02:44:47,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 02:44:47,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 02:44:47,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 02:44:47,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 02:44:47,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 02:44:47,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 02:44:47,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 02:44:47,270 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 02:44:47,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 02:44:47,271 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 02:44:47,271 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 02:44:47,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 02:44:47,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 02:44:47,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 02:44:47,271 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 02:44:47,272 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 02:44:47,272 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 02:44:47,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 02:44:47,272 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 02:44:47,272 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 02:44:47,272 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 02:44:47,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 02:44:47,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 02:44:47,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 02:44:47,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:44:47,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 02:44:47,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 02:44:47,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 02:44:47,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 02:44:47,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 02:44:47,274 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 02:44:47,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 02:44:47,275 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 02:44:47,275 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 [2023-02-17 02:44:47,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 02:44:47,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 02:44:47,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 02:44:47,563 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 02:44:47,563 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 02:44:47,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2023-02-17 02:44:48,737 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 02:44:48,921 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 02:44:48,922 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2023-02-17 02:44:48,927 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0490765b7/e4614f9bac5148ecac86de7df3d62a0d/FLAG3b8044f29 [2023-02-17 02:44:48,938 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0490765b7/e4614f9bac5148ecac86de7df3d62a0d [2023-02-17 02:44:48,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 02:44:48,941 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 02:44:48,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 02:44:48,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 02:44:48,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 02:44:48,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:44:48" (1/1) ... [2023-02-17 02:44:48,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@646e8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:48, skipping insertion in model container [2023-02-17 02:44:48,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:44:48" (1/1) ... [2023-02-17 02:44:48,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 02:44:48,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 02:44:49,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:44:49,099 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 02:44:49,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:44:49,127 INFO L208 MainTranslator]: Completed translation [2023-02-17 02:44:49,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49 WrapperNode [2023-02-17 02:44:49,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 02:44:49,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 02:44:49,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 02:44:49,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 02:44:49,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,155 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2023-02-17 02:44:49,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 02:44:49,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 02:44:49,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 02:44:49,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 02:44:49,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 02:44:49,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 02:44:49,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 02:44:49,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 02:44:49,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (1/1) ... [2023-02-17 02:44:49,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:44:49,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:44:49,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 02:44:49,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 02:44:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 02:44:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 02:44:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 02:44:49,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 02:44:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 02:44:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 02:44:49,317 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 02:44:49,318 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 02:44:49,499 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 02:44:49,504 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 02:44:49,507 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 02:44:49,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:44:49 BoogieIcfgContainer [2023-02-17 02:44:49,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 02:44:49,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 02:44:49,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 02:44:49,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 02:44:49,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 02:44:48" (1/3) ... [2023-02-17 02:44:49,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77289e24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:44:49, skipping insertion in model container [2023-02-17 02:44:49,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:44:49" (2/3) ... [2023-02-17 02:44:49,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77289e24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:44:49, skipping insertion in model container [2023-02-17 02:44:49,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:44:49" (3/3) ... [2023-02-17 02:44:49,547 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-2.c [2023-02-17 02:44:49,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 02:44:49,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-02-17 02:44:49,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 02:44:49,649 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;@17b5d657, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 02:44:49,650 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-02-17 02:44:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 02:44:49,666 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:49,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 02:44:49,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:49,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:49,674 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-02-17 02:44:49,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:49,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640714656] [2023-02-17 02:44:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:49,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:49,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:44:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640714656] [2023-02-17 02:44:49,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640714656] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:44:49,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:44:49,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:44:49,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252814474] [2023-02-17 02:44:49,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:44:49,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:44:49,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:44:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:44:49,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:44:49,947 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:50,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:44:50,055 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-02-17 02:44:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:44:50,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-17 02:44:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:44:50,064 INFO L225 Difference]: With dead ends: 47 [2023-02-17 02:44:50,064 INFO L226 Difference]: Without dead ends: 45 [2023-02-17 02:44:50,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:44:50,081 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 23 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:44:50,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 51 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:44:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-17 02:44:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2023-02-17 02:44:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-02-17 02:44:50,120 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 4 [2023-02-17 02:44:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:44:50,121 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-02-17 02:44:50,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-02-17 02:44:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 02:44:50,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:50,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 02:44:50,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 02:44:50,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-02-17 02:44:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:50,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510449943] [2023-02-17 02:44:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:50,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:50,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:44:50,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510449943] [2023-02-17 02:44:50,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510449943] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:44:50,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:44:50,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:44:50,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799616789] [2023-02-17 02:44:50,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:44:50,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:44:50,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:44:50,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:44:50,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:44:50,257 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:44:50,314 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-02-17 02:44:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:44:50,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-17 02:44:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:44:50,315 INFO L225 Difference]: With dead ends: 41 [2023-02-17 02:44:50,315 INFO L226 Difference]: Without dead ends: 41 [2023-02-17 02:44:50,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:44:50,317 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:44:50,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:44:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-17 02:44:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-02-17 02:44:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-02-17 02:44:50,322 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 4 [2023-02-17 02:44:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:44:50,323 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-02-17 02:44:50,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-02-17 02:44:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 02:44:50,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:50,324 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-17 02:44:50,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 02:44:50,324 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-02-17 02:44:50,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:50,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043464851] [2023-02-17 02:44:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:50,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:50,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:44:50,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043464851] [2023-02-17 02:44:50,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043464851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:44:50,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942549154] [2023-02-17 02:44:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:50,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:50,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:44:50,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:44:50,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 02:44:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 02:44:50,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:44:50,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:44:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:50,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:44:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:50,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942549154] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:44:50,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:44:50,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-02-17 02:44:50,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577242202] [2023-02-17 02:44:50,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:44:50,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 02:44:50,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:44:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 02:44:50,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:44:50,710 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:44:50,841 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2023-02-17 02:44:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:44:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 02:44:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:44:50,844 INFO L225 Difference]: With dead ends: 49 [2023-02-17 02:44:50,844 INFO L226 Difference]: Without dead ends: 49 [2023-02-17 02:44:50,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:44:50,848 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:44:50,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 100 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:44:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-17 02:44:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-17 02:44:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.425) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-17 02:44:50,868 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 8 [2023-02-17 02:44:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:44:50,869 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-17 02:44:50,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-17 02:44:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 02:44:50,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:50,871 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:44:50,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 02:44:51,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:51,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash 868179552, now seen corresponding path program 1 times [2023-02-17 02:44:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:51,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754316853] [2023-02-17 02:44:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:51,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 02:44:51,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:44:51,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754316853] [2023-02-17 02:44:51,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754316853] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:44:51,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579697287] [2023-02-17 02:44:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:51,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:44:51,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:44:51,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 02:44:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:51,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 02:44:51,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:44:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:51,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:44:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:51,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579697287] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:44:51,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:44:51,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2023-02-17 02:44:51,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180821128] [2023-02-17 02:44:51,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:44:51,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 02:44:51,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:44:51,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 02:44:51,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-02-17 02:44:51,364 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:44:51,532 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2023-02-17 02:44:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 02:44:51,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-17 02:44:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:44:51,534 INFO L225 Difference]: With dead ends: 70 [2023-02-17 02:44:51,534 INFO L226 Difference]: Without dead ends: 70 [2023-02-17 02:44:51,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2023-02-17 02:44:51,537 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:44:51,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 73 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:44:51,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-17 02:44:51,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2023-02-17 02:44:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2023-02-17 02:44:51,553 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 23 [2023-02-17 02:44:51,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:44:51,554 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2023-02-17 02:44:51,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:51,554 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2023-02-17 02:44:51,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 02:44:51,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:51,556 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:44:51,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 02:44:51,761 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,SelfDestructingSolverStorable3 [2023-02-17 02:44:51,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:51,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1707912335, now seen corresponding path program 1 times [2023-02-17 02:44:51,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:51,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192052842] [2023-02-17 02:44:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:51,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:52,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:44:52,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192052842] [2023-02-17 02:44:52,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192052842] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:44:52,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521643162] [2023-02-17 02:44:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:52,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:52,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:44:52,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:44:52,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 02:44:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 02:44:52,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:44:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:52,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:44:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:52,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521643162] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:44:52,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:44:52,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-17 02:44:52,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291409037] [2023-02-17 02:44:52,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:44:52,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 02:44:52,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:44:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 02:44:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-17 02:44:52,382 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:44:52,484 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2023-02-17 02:44:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 02:44:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-17 02:44:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:44:52,485 INFO L225 Difference]: With dead ends: 112 [2023-02-17 02:44:52,485 INFO L226 Difference]: Without dead ends: 112 [2023-02-17 02:44:52,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-17 02:44:52,487 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:44:52,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 145 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:44:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-17 02:44:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-02-17 02:44:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 111 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2023-02-17 02:44:52,493 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 47 [2023-02-17 02:44:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:44:52,493 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2023-02-17 02:44:52,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2023-02-17 02:44:52,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-17 02:44:52,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:52,496 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:44:52,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 02:44:52,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:52,702 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:52,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash -726611221, now seen corresponding path program 2 times [2023-02-17 02:44:52,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:52,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33866084] [2023-02-17 02:44:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:52,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:53,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:44:53,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33866084] [2023-02-17 02:44:53,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33866084] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:44:53,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686971572] [2023-02-17 02:44:53,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:44:53,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:53,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:44:53,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:44:53,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 02:44:53,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 02:44:53,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:44:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 02:44:53,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:44:53,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:44:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-02-17 02:44:53,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:44:53,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686971572] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:44:53,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:44:53,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [25] total 27 [2023-02-17 02:44:53,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765511439] [2023-02-17 02:44:53,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:44:53,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:44:53,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:44:53,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:44:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2023-02-17 02:44:53,500 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:44:53,547 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2023-02-17 02:44:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 02:44:53,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 95 [2023-02-17 02:44:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:44:53,548 INFO L225 Difference]: With dead ends: 127 [2023-02-17 02:44:53,548 INFO L226 Difference]: Without dead ends: 127 [2023-02-17 02:44:53,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2023-02-17 02:44:53,550 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 60 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:44:53,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 26 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:44:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-17 02:44:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-02-17 02:44:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 120 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2023-02-17 02:44:53,555 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 95 [2023-02-17 02:44:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:44:53,556 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2023-02-17 02:44:53,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2023-02-17 02:44:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-17 02:44:53,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:53,558 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:44:53,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 02:44:53,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:53,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:53,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1806473229, now seen corresponding path program 1 times [2023-02-17 02:44:53,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:53,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959555466] [2023-02-17 02:44:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:53,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-02-17 02:44:53,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:44:53,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959555466] [2023-02-17 02:44:53,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959555466] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:44:53,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:44:53,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:44:53,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449721548] [2023-02-17 02:44:53,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:44:53,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:44:53,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:44:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:44:53,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:44:53,858 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:44:53,863 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2023-02-17 02:44:53,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:44:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 97 [2023-02-17 02:44:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:44:53,866 INFO L225 Difference]: With dead ends: 120 [2023-02-17 02:44:53,866 INFO L226 Difference]: Without dead ends: 120 [2023-02-17 02:44:53,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:44:53,868 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:44:53,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:44:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-17 02:44:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-02-17 02:44:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0862068965517242) internal successors, (126), 119 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2023-02-17 02:44:53,885 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 97 [2023-02-17 02:44:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:44:53,886 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2023-02-17 02:44:53,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2023-02-17 02:44:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-17 02:44:53,890 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:53,890 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:44:53,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 02:44:53,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:53,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:53,891 INFO L85 PathProgramCache]: Analyzing trace with hash 853988464, now seen corresponding path program 1 times [2023-02-17 02:44:53,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:53,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236114355] [2023-02-17 02:44:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:53,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-02-17 02:44:54,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:44:54,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236114355] [2023-02-17 02:44:54,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236114355] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:44:54,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:44:54,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:44:54,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832100245] [2023-02-17 02:44:54,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:44:54,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:44:54,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:44:54,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:44:54,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:44:54,066 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:44:54,113 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2023-02-17 02:44:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:44:54,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-02-17 02:44:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:44:54,114 INFO L225 Difference]: With dead ends: 125 [2023-02-17 02:44:54,115 INFO L226 Difference]: Without dead ends: 125 [2023-02-17 02:44:54,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:44:54,116 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:44:54,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:44:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-17 02:44:54,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2023-02-17 02:44:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2023-02-17 02:44:54,124 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 99 [2023-02-17 02:44:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:44:54,125 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2023-02-17 02:44:54,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2023-02-17 02:44:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-17 02:44:54,131 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:54,132 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:44:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 02:44:54,132 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:54,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:54,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1714714637, now seen corresponding path program 1 times [2023-02-17 02:44:54,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:54,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105393489] [2023-02-17 02:44:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:54,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:54,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:44:54,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105393489] [2023-02-17 02:44:54,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105393489] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:44:54,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476063017] [2023-02-17 02:44:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:54,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:54,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:44:54,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:44:54,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 02:44:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:54,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-17 02:44:54,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:44:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:55,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:44:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:55,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476063017] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:44:55,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:44:55,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-17 02:44:55,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745176693] [2023-02-17 02:44:55,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:44:55,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-17 02:44:55,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:44:55,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-17 02:44:55,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-17 02:44:55,759 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:44:55,952 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2023-02-17 02:44:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-17 02:44:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2023-02-17 02:44:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:44:55,954 INFO L225 Difference]: With dead ends: 216 [2023-02-17 02:44:55,954 INFO L226 Difference]: Without dead ends: 216 [2023-02-17 02:44:55,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-17 02:44:55,957 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:44:55,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 202 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:44:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-02-17 02:44:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-02-17 02:44:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.0424528301886793) internal successors, (221), 215 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2023-02-17 02:44:55,962 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 101 [2023-02-17 02:44:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:44:55,962 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2023-02-17 02:44:55,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2023-02-17 02:44:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-02-17 02:44:55,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:55,965 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:44:55,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 02:44:56,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:56,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:56,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1874420395, now seen corresponding path program 2 times [2023-02-17 02:44:56,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:56,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583100601] [2023-02-17 02:44:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:56,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:44:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:44:58,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:44:58,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583100601] [2023-02-17 02:44:58,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583100601] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:44:58,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064362477] [2023-02-17 02:44:58,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:44:58,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:58,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:44:58,074 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:44:58,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 02:44:58,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 02:44:58,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:44:58,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 02:44:58,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:44:58,329 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~p~0#1.base| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base| 0)))) is different from true [2023-02-17 02:44:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2023-02-17 02:44:58,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:44:58,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064362477] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:44:58,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:44:58,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [49] total 51 [2023-02-17 02:44:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781912089] [2023-02-17 02:44:58,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:44:58,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:44:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:44:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:44:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1273, Unknown=1, NotChecked=96, Total=2550 [2023-02-17 02:44:58,336 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:44:58,415 INFO L93 Difference]: Finished difference Result 215 states and 220 transitions. [2023-02-17 02:44:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 02:44:58,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 197 [2023-02-17 02:44:58,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:44:58,417 INFO L225 Difference]: With dead ends: 215 [2023-02-17 02:44:58,417 INFO L226 Difference]: Without dead ends: 211 [2023-02-17 02:44:58,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1183, Invalid=1370, Unknown=1, NotChecked=98, Total=2652 [2023-02-17 02:44:58,418 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:44:58,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2023-02-17 02:44:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-17 02:44:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-02-17 02:44:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 208 states have (on average 1.0336538461538463) internal successors, (215), 210 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2023-02-17 02:44:58,421 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 197 [2023-02-17 02:44:58,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:44:58,422 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2023-02-17 02:44:58,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:44:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2023-02-17 02:44:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-02-17 02:44:58,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:44:58,423 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:44:58,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 02:44:58,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:44:58,624 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:44:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:44:58,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1875755066, now seen corresponding path program 1 times [2023-02-17 02:44:58,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:44:58,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431623258] [2023-02-17 02:44:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:44:58,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:44:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:45:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 02:45:00,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:45:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431623258] [2023-02-17 02:45:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431623258] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:45:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180986743] [2023-02-17 02:45:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:45:00,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:45:00,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:45:00,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:45:00,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 02:45:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:45:00,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 02:45:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:45:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 02:45:01,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:45:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 02:45:03,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180986743] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:45:03,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:45:03,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-02-17 02:45:03,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038664261] [2023-02-17 02:45:03,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:45:03,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-02-17 02:45:03,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:45:03,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-02-17 02:45:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-02-17 02:45:03,788 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:45:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:45:04,169 INFO L93 Difference]: Finished difference Result 403 states and 407 transitions. [2023-02-17 02:45:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-02-17 02:45:04,170 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 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 197 [2023-02-17 02:45:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:45:04,172 INFO L225 Difference]: With dead ends: 403 [2023-02-17 02:45:04,172 INFO L226 Difference]: Without dead ends: 403 [2023-02-17 02:45:04,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 300 SyntacticMatches, 46 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-02-17 02:45:04,175 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:45:04,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 182 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:45:04,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-02-17 02:45:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2023-02-17 02:45:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 400 states have (on average 1.0175) internal successors, (407), 402 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:45:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 407 transitions. [2023-02-17 02:45:04,182 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 407 transitions. Word has length 197 [2023-02-17 02:45:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:45:04,182 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 407 transitions. [2023-02-17 02:45:04,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:45:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 407 transitions. [2023-02-17 02:45:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-02-17 02:45:04,187 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:45:04,188 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:45:04,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 02:45:04,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:45:04,395 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:45:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:45:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash -385247830, now seen corresponding path program 2 times [2023-02-17 02:45:04,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:45:04,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479800143] [2023-02-17 02:45:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:45:04,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:45:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:45:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 02:45:10,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:45:10,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479800143] [2023-02-17 02:45:10,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479800143] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:45:10,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243411988] [2023-02-17 02:45:10,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:45:10,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:45:10,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:45:10,502 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:45:10,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 02:45:10,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:45:10,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:45:10,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-17 02:45:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:45:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 02:45:13,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:45:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 02:45:22,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243411988] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:45:22,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:45:22,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-02-17 02:45:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433038304] [2023-02-17 02:45:22,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:45:22,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-02-17 02:45:22,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:45:22,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-02-17 02:45:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-02-17 02:45:22,162 INFO L87 Difference]: Start difference. First operand 403 states and 407 transitions. Second operand has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:45:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:45:23,314 INFO L93 Difference]: Finished difference Result 787 states and 791 transitions. [2023-02-17 02:45:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-02-17 02:45:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 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 389 [2023-02-17 02:45:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:45:23,321 INFO L225 Difference]: With dead ends: 787 [2023-02-17 02:45:23,321 INFO L226 Difference]: Without dead ends: 787 [2023-02-17 02:45:23,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 588 SyntacticMatches, 94 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4934 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-02-17 02:45:23,324 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 02:45:23,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 328 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 02:45:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2023-02-17 02:45:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 787. [2023-02-17 02:45:23,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 784 states have (on average 1.0089285714285714) internal successors, (791), 786 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:45:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 791 transitions. [2023-02-17 02:45:23,334 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 791 transitions. Word has length 389 [2023-02-17 02:45:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:45:23,335 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 791 transitions. [2023-02-17 02:45:23,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:45:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 791 transitions. [2023-02-17 02:45:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2023-02-17 02:45:23,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:45:23,350 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:45:23,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 02:45:23,560 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,SelfDestructingSolverStorable11 [2023-02-17 02:45:23,561 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:45:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:45:23,562 INFO L85 PathProgramCache]: Analyzing trace with hash 587317386, now seen corresponding path program 3 times [2023-02-17 02:45:23,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:45:23,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960098465] [2023-02-17 02:45:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:45:23,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:45:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:45:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 02:45:46,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:45:46,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960098465] [2023-02-17 02:45:46,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960098465] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:45:46,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704724991] [2023-02-17 02:45:46,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 02:45:46,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:45:46,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:45:46,709 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:45:46,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 02:45:46,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 02:45:46,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:45:46,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 02:45:46,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:45:46,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 02:45:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 72010 trivial. 0 not checked. [2023-02-17 02:45:47,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:45:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 72010 trivial. 0 not checked. [2023-02-17 02:45:48,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704724991] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:45:48,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:45:48,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 7, 7] total 205 [2023-02-17 02:45:48,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412626733] [2023-02-17 02:45:48,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:45:48,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2023-02-17 02:45:48,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:45:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2023-02-17 02:45:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18572, Invalid=23248, Unknown=0, NotChecked=0, Total=41820 [2023-02-17 02:45:48,435 INFO L87 Difference]: Start difference. First operand 787 states and 791 transitions. Second operand has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:46:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:46:08,001 INFO L93 Difference]: Finished difference Result 833 states and 846 transitions. [2023-02-17 02:46:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2023-02-17 02:46:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 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 773 [2023-02-17 02:46:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:46:08,006 INFO L225 Difference]: With dead ends: 833 [2023-02-17 02:46:08,006 INFO L226 Difference]: Without dead ends: 833 [2023-02-17 02:46:08,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1938 GetRequests, 1534 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22620 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=58610, Invalid=105820, Unknown=0, NotChecked=0, Total=164430 [2023-02-17 02:46:08,019 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4818 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4818 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 02:46:08,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4818 Valid, 380 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 02:46:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2023-02-17 02:46:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 812. [2023-02-17 02:46:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 811 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:46:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 821 transitions. [2023-02-17 02:46:08,031 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 821 transitions. Word has length 773 [2023-02-17 02:46:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:46:08,032 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 821 transitions. [2023-02-17 02:46:08,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:46:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 821 transitions. [2023-02-17 02:46:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2023-02-17 02:46:08,050 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:46:08,051 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:46:08,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 02:46:08,261 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,SelfDestructingSolverStorable12 [2023-02-17 02:46:08,261 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:46:08,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:46:08,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1797387683, now seen corresponding path program 1 times [2023-02-17 02:46:08,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:46:08,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316072539] [2023-02-17 02:46:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:46:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:46:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:46:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 72804 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 72783 trivial. 0 not checked. [2023-02-17 02:46:08,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:46:08,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316072539] [2023-02-17 02:46:08,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316072539] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:46:08,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:46:08,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:46:08,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853185515] [2023-02-17 02:46:08,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:46:08,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 02:46:08,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:46:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 02:46:08,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:46:08,621 INFO L87 Difference]: Start difference. First operand 812 states and 821 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:46:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:46:08,627 INFO L93 Difference]: Finished difference Result 815 states and 821 transitions. [2023-02-17 02:46:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 02:46:08,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 789 [2023-02-17 02:46:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:46:08,631 INFO L225 Difference]: With dead ends: 815 [2023-02-17 02:46:08,631 INFO L226 Difference]: Without dead ends: 812 [2023-02-17 02:46:08,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 02:46:08,632 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:46:08,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:46:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2023-02-17 02:46:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2023-02-17 02:46:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 1.0073982737361282) internal successors, (817), 811 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:46:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 817 transitions. [2023-02-17 02:46:08,642 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 817 transitions. Word has length 789 [2023-02-17 02:46:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:46:08,643 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 817 transitions. [2023-02-17 02:46:08,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:46:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 817 transitions. [2023-02-17 02:46:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2023-02-17 02:46:08,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:46:08,649 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-17 02:46:08,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-17 02:46:08,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-17 02:46:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:46:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1085945492, now seen corresponding path program 4 times [2023-02-17 02:46:08,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:46:08,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624319710] [2023-02-17 02:46:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:46:08,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:46:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:46:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 72819 backedges. 0 proven. 72771 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-17 02:46:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:46:32,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624319710] [2023-02-17 02:46:32,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624319710] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:46:32,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604578968] [2023-02-17 02:46:32,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 02:46:32,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:46:32,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:46:32,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 02:46:32,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process