./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/loop-acceleration/array3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/loop-acceleration/array3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9dfb76d38495bc50f893b9a1fbc1c4079ae42ab458f1c235795d8ebc0da579ea --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 22:32:39,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 22:32:39,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 22:32:39,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 22:32:39,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 22:32:39,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 22:32:39,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 22:32:39,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 22:32:39,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 22:32:39,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 22:32:39,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 22:32:39,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 22:32:39,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 22:32:39,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 22:32:39,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 22:32:39,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 22:32:39,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 22:32:39,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 22:32:39,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 22:32:39,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 22:32:39,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 22:32:39,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 22:32:39,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 22:32:39,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 22:32:39,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 22:32:39,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 22:32:39,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 22:32:39,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 22:32:39,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 22:32:39,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 22:32:39,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 22:32:39,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 22:32:39,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 22:32:39,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 22:32:39,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 22:32:39,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 22:32:39,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 22:32:39,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 22:32:39,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 22:32:39,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 22:32:39,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 22:32:39,572 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 22:32:39,601 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 22:32:39,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 22:32:39,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 22:32:39,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 22:32:39,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 22:32:39,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 22:32:39,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 22:32:39,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 22:32:39,603 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 22:32:39,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 22:32:39,604 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 22:32:39,604 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 22:32:39,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 22:32:39,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 22:32:39,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 22:32:39,605 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 22:32:39,605 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 22:32:39,605 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 22:32:39,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 22:32:39,605 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 22:32:39,606 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 22:32:39,606 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 22:32:39,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 22:32:39,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 22:32:39,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 22:32:39,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:32:39,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 22:32:39,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 22:32:39,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 22:32:39,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 22:32:39,607 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 22:32:39,607 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 22:32:39,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 22:32:39,608 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 22:32:39,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dfb76d38495bc50f893b9a1fbc1c4079ae42ab458f1c235795d8ebc0da579ea [2023-02-15 22:32:39,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 22:32:39,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 22:32:39,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 22:32:39,812 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 22:32:39,812 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 22:32:39,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array3.i [2023-02-15 22:32:40,933 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 22:32:41,089 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 22:32:41,089 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array3.i [2023-02-15 22:32:41,094 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0a20744a/7f43b899eb594dc89a32b1430f50836e/FLAGd0765e246 [2023-02-15 22:32:41,105 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0a20744a/7f43b899eb594dc89a32b1430f50836e [2023-02-15 22:32:41,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 22:32:41,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 22:32:41,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 22:32:41,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 22:32:41,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 22:32:41,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67484cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41, skipping insertion in model container [2023-02-15 22:32:41,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 22:32:41,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 22:32:41,229 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array3.i[846,859] [2023-02-15 22:32:41,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:32:41,258 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 22:32:41,266 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array3.i[846,859] [2023-02-15 22:32:41,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:32:41,280 INFO L208 MainTranslator]: Completed translation [2023-02-15 22:32:41,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41 WrapperNode [2023-02-15 22:32:41,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 22:32:41,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 22:32:41,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 22:32:41,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 22:32:41,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,303 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2023-02-15 22:32:41,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 22:32:41,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 22:32:41,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 22:32:41,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 22:32:41,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,316 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 22:32:41,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 22:32:41,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 22:32:41,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 22:32:41,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (1/1) ... [2023-02-15 22:32:41,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:32:41,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:32:41,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 22:32:41,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 22:32:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 22:32:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 22:32:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 22:32:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 22:32:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 22:32:41,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 22:32:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 22:32:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 22:32:41,433 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 22:32:41,436 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 22:32:41,611 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 22:32:41,616 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 22:32:41,616 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 22:32:41,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:32:41 BoogieIcfgContainer [2023-02-15 22:32:41,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 22:32:41,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 22:32:41,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 22:32:41,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 22:32:41,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:32:41" (1/3) ... [2023-02-15 22:32:41,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329217e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:32:41, skipping insertion in model container [2023-02-15 22:32:41,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:41" (2/3) ... [2023-02-15 22:32:41,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329217e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:32:41, skipping insertion in model container [2023-02-15 22:32:41,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:32:41" (3/3) ... [2023-02-15 22:32:41,669 INFO L112 eAbstractionObserver]: Analyzing ICFG array3.i [2023-02-15 22:32:41,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 22:32:41,681 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-02-15 22:32:41,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 22:32:41,732 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;@5e64b6ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 22:32:41,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-02-15 22:32:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 22:32:41,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:41,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 22:32:41,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:41,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:41,742 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-02-15 22:32:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:41,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21972110] [2023-02-15 22:32:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:41,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:41,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:41,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21972110] [2023-02-15 22:32:41,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21972110] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:32:41,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:32:41,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:32:41,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521449096] [2023-02-15 22:32:41,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:32:41,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:32:41,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:41,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:32:41,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:32:41,924 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 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) [2023-02-15 22:32:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:41,945 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-02-15 22:32:41,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:32:41,947 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 [2023-02-15 22:32:41,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:41,952 INFO L225 Difference]: With dead ends: 22 [2023-02-15 22:32:41,952 INFO L226 Difference]: Without dead ends: 20 [2023-02-15 22:32:41,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:32:41,956 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:41,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:32:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-15 22:32:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-15 22:32:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 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) [2023-02-15 22:32:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-02-15 22:32:41,976 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2023-02-15 22:32:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:41,976 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-02-15 22:32:41,977 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) [2023-02-15 22:32:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-02-15 22:32:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 22:32:41,977 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:41,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 22:32:41,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 22:32:41,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:41,979 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-02-15 22:32:41,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:41,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616052429] [2023-02-15 22:32:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:41,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:42,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:42,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616052429] [2023-02-15 22:32:42,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616052429] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:32:42,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:32:42,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:32:42,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750553271] [2023-02-15 22:32:42,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:32:42,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:32:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:32:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:32:42,084 INFO L87 Difference]: Start difference. First operand 20 states and 22 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) [2023-02-15 22:32:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:42,117 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2023-02-15 22:32:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:32:42,118 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 [2023-02-15 22:32:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:42,118 INFO L225 Difference]: With dead ends: 24 [2023-02-15 22:32:42,118 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 22:32:42,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:32:42,120 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:42,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:32:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 22:32:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-02-15 22:32:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-15 22:32:42,128 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2023-02-15 22:32:42,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:42,129 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-15 22:32:42,130 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) [2023-02-15 22:32:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-15 22:32:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:32:42,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:42,131 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-15 22:32:42,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 22:32:42,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-02-15 22:32:42,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:42,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692128378] [2023-02-15 22:32:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:42,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:42,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:42,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692128378] [2023-02-15 22:32:42,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692128378] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:32:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301418887] [2023-02-15 22:32:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:42,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:42,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:32:42,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:32:42,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 22:32:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:42,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 22:32:42,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:32:42,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:32:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:42,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:32:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:42,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301418887] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:32:42,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:32:42,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-02-15 22:32:42,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971371992] [2023-02-15 22:32:42,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:32:42,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:32:42,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:42,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:32:42,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:32:42,452 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:42,524 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-02-15 22:32:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:32:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 22:32:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:42,527 INFO L225 Difference]: With dead ends: 36 [2023-02-15 22:32:42,527 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 22:32:42,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:32:42,530 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:42,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:32:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 22:32:42,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-02-15 22:32:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-15 22:32:42,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 8 [2023-02-15 22:32:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:42,539 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-15 22:32:42,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-15 22:32:42,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 22:32:42,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:42,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 22:32:42,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 22:32:42,746 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 [2023-02-15 22:32:42,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:42,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:42,747 INFO L85 PathProgramCache]: Analyzing trace with hash -4646107, now seen corresponding path program 1 times [2023-02-15 22:32:42,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:42,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116674393] [2023-02-15 22:32:42,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:42,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:32:42,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:42,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116674393] [2023-02-15 22:32:42,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116674393] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:32:42,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717611513] [2023-02-15 22:32:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:42,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:42,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:32:42,840 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:32:42,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 22:32:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:42,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 22:32:42,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:32:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:42,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:32:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:42,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717611513] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:32:42,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:32:42,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-02-15 22:32:42,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947054620] [2023-02-15 22:32:42,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:32:42,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 22:32:42,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:42,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 22:32:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:32:42,932 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:43,046 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2023-02-15 22:32:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 22:32:43,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 13 [2023-02-15 22:32:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:43,047 INFO L225 Difference]: With dead ends: 112 [2023-02-15 22:32:43,047 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 22:32:43,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-02-15 22:32:43,048 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 208 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:43,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 58 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:32:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 22:32:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 64. [2023-02-15 22:32:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.3) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2023-02-15 22:32:43,054 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 13 [2023-02-15 22:32:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:43,055 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2023-02-15 22:32:43,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2023-02-15 22:32:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 22:32:43,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:43,056 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-02-15 22:32:43,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 22:32:43,260 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 [2023-02-15 22:32:43,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:43,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-02-15 22:32:43,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:43,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796372841] [2023-02-15 22:32:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:43,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:43,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:43,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796372841] [2023-02-15 22:32:43,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796372841] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:32:43,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132008835] [2023-02-15 22:32:43,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:32:43,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:43,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:32:43,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:32:43,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 22:32:43,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:32:43,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:32:43,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 22:32:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:32:43,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:32:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:43,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:32:43,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132008835] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:32:43,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:32:43,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-02-15 22:32:43,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751625256] [2023-02-15 22:32:43,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:32:43,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 22:32:43,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:43,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 22:32:43,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:32:43,630 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:43,709 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2023-02-15 22:32:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 22:32:43,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 22:32:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:43,710 INFO L225 Difference]: With dead ends: 83 [2023-02-15 22:32:43,710 INFO L226 Difference]: Without dead ends: 83 [2023-02-15 22:32:43,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:32:43,711 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:43,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 77 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:32:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-15 22:32:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2023-02-15 22:32:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-02-15 22:32:43,715 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2023-02-15 22:32:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:43,715 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-02-15 22:32:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-02-15 22:32:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 22:32:43,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:43,716 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:32:43,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 22:32:43,921 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 [2023-02-15 22:32:43,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:43,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:43,922 INFO L85 PathProgramCache]: Analyzing trace with hash 153628198, now seen corresponding path program 1 times [2023-02-15 22:32:43,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:43,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899822105] [2023-02-15 22:32:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:43,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 22:32:43,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:43,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899822105] [2023-02-15 22:32:43,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899822105] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:32:43,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:32:43,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:32:43,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424155465] [2023-02-15 22:32:43,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:32:43,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:32:43,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:43,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:32:43,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:32:43,983 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2023-02-15 22:32:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:44,005 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2023-02-15 22:32:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:32:44,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 33 [2023-02-15 22:32:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:44,006 INFO L225 Difference]: With dead ends: 68 [2023-02-15 22:32:44,006 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 22:32:44,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:32:44,008 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:44,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 31 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:32:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 22:32:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2023-02-15 22:32:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2023-02-15 22:32:44,019 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2023-02-15 22:32:44,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:44,019 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2023-02-15 22:32:44,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2023-02-15 22:32:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2023-02-15 22:32:44,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 22:32:44,020 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:44,021 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:32:44,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 22:32:44,021 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash 153681776, now seen corresponding path program 1 times [2023-02-15 22:32:44,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:44,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143607859] [2023-02-15 22:32:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:44,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:32:44,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:44,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143607859] [2023-02-15 22:32:44,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143607859] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:32:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862581110] [2023-02-15 22:32:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:44,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:44,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:32:44,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:32:44,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 22:32:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:44,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 22:32:44,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:32:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:32:44,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:32:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:32:44,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862581110] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:32:44,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:32:44,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-15 22:32:44,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521582902] [2023-02-15 22:32:44,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:32:44,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 22:32:44,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:44,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 22:32:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 22:32:44,314 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:44,443 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2023-02-15 22:32:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 22:32:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-15 22:32:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:44,445 INFO L225 Difference]: With dead ends: 236 [2023-02-15 22:32:44,445 INFO L226 Difference]: Without dead ends: 236 [2023-02-15 22:32:44,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 22:32:44,446 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 294 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:44,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 128 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:32:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-02-15 22:32:44,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 129. [2023-02-15 22:32:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.253968253968254) internal successors, (158), 128 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 158 transitions. [2023-02-15 22:32:44,451 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 158 transitions. Word has length 33 [2023-02-15 22:32:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:44,451 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 158 transitions. [2023-02-15 22:32:44,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 158 transitions. [2023-02-15 22:32:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 22:32:44,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:44,452 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:32:44,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 22:32:44,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:44,658 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:44,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1641667672, now seen corresponding path program 2 times [2023-02-15 22:32:44,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:44,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551670323] [2023-02-15 22:32:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:44,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:32:44,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:44,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551670323] [2023-02-15 22:32:44,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551670323] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:32:44,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973061408] [2023-02-15 22:32:44,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:32:44,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:44,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:32:44,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:32:45,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 22:32:45,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:32:45,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:32:45,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 22:32:45,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:32:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:32:45,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:32:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:32:45,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973061408] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:32:45,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:32:45,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-15 22:32:45,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278122505] [2023-02-15 22:32:45,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:32:45,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 22:32:45,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:45,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 22:32:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 22:32:45,432 INFO L87 Difference]: Start difference. First operand 129 states and 158 transitions. Second operand has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 33 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:45,724 INFO L93 Difference]: Finished difference Result 492 states and 494 transitions. [2023-02-15 22:32:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 22:32:45,724 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 33 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-02-15 22:32:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:45,727 INFO L225 Difference]: With dead ends: 492 [2023-02-15 22:32:45,727 INFO L226 Difference]: Without dead ends: 492 [2023-02-15 22:32:45,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 22:32:45,728 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 995 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:45,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 260 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:32:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-15 22:32:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 257. [2023-02-15 22:32:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 254 states have (on average 1.2519685039370079) internal successors, (318), 256 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 318 transitions. [2023-02-15 22:32:45,749 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 318 transitions. Word has length 65 [2023-02-15 22:32:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:45,749 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 318 transitions. [2023-02-15 22:32:45,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 33 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 318 transitions. [2023-02-15 22:32:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-15 22:32:45,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:45,754 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:32:45,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 22:32:45,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:45,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:45,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1156757032, now seen corresponding path program 3 times [2023-02-15 22:32:45,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:45,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486513691] [2023-02-15 22:32:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:45,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:32:46,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:46,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486513691] [2023-02-15 22:32:46,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486513691] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:32:46,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025845509] [2023-02-15 22:32:46,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 22:32:46,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:46,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:32:46,804 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:32:46,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 22:32:46,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 22:32:46,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:32:46,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 22:32:46,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:32:46,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:32:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-02-15 22:32:47,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:32:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-02-15 22:32:47,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025845509] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:32:47,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:32:47,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 4, 4] total 39 [2023-02-15 22:32:47,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062344788] [2023-02-15 22:32:47,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:32:47,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 22:32:47,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 22:32:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=872, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 22:32:47,603 INFO L87 Difference]: Start difference. First operand 257 states and 318 transitions. Second operand has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:48,840 INFO L93 Difference]: Finished difference Result 500 states and 506 transitions. [2023-02-15 22:32:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-15 22:32:48,840 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 0 states have call successors, (0), 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 129 [2023-02-15 22:32:48,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:48,842 INFO L225 Difference]: With dead ends: 500 [2023-02-15 22:32:48,842 INFO L226 Difference]: Without dead ends: 500 [2023-02-15 22:32:48,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2023-02-15 22:32:48,843 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1917 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:48,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1917 Valid, 257 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 22:32:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2023-02-15 22:32:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 271. [2023-02-15 22:32:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 268 states have (on average 1.1417910447761195) internal successors, (306), 270 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 306 transitions. [2023-02-15 22:32:48,858 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 306 transitions. Word has length 129 [2023-02-15 22:32:48,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:48,869 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 306 transitions. [2023-02-15 22:32:48,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:48,869 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 306 transitions. [2023-02-15 22:32:48,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-15 22:32:48,870 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:48,870 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:32:48,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 22:32:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:49,075 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:49,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1517991899, now seen corresponding path program 1 times [2023-02-15 22:32:49,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:49,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073094866] [2023-02-15 22:32:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:49,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:49,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073094866] [2023-02-15 22:32:49,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073094866] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:32:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701353189] [2023-02-15 22:32:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:49,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:49,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:32:49,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:32:49,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 22:32:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:49,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 22:32:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:32:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:50,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:32:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:51,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701353189] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:32:51,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:32:51,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2023-02-15 22:32:51,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067032122] [2023-02-15 22:32:51,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:32:51,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-15 22:32:51,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-15 22:32:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-02-15 22:32:51,076 INFO L87 Difference]: Start difference. First operand 271 states and 306 transitions. Second operand has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:52,071 INFO L93 Difference]: Finished difference Result 1004 states and 1006 transitions. [2023-02-15 22:32:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-15 22:32:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 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 134 [2023-02-15 22:32:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:52,074 INFO L225 Difference]: With dead ends: 1004 [2023-02-15 22:32:52,074 INFO L226 Difference]: Without dead ends: 1004 [2023-02-15 22:32:52,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-02-15 22:32:52,078 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2376 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2376 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:52,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2376 Valid, 528 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:32:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2023-02-15 22:32:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 529. [2023-02-15 22:32:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 526 states have (on average 1.1901140684410647) internal successors, (626), 528 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 626 transitions. [2023-02-15 22:32:52,095 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 626 transitions. Word has length 134 [2023-02-15 22:32:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:52,095 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 626 transitions. [2023-02-15 22:32:52,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 626 transitions. [2023-02-15 22:32:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-02-15 22:32:52,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:52,097 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:32:52,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 22:32:52,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:52,303 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:52,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:52,303 INFO L85 PathProgramCache]: Analyzing trace with hash 935209982, now seen corresponding path program 2 times [2023-02-15 22:32:52,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:52,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492872811] [2023-02-15 22:32:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:52,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:32:54,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:54,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492872811] [2023-02-15 22:32:54,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492872811] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:32:54,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122809192] [2023-02-15 22:32:54,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:32:54,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:54,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:32:54,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:32:54,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 22:32:54,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 22:32:54,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:32:54,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 22:32:54,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:32:55,406 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#A~0#1.base_17| Int)) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#A~0#1.base_17| 0)) (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#A~0#1.base_17|)))) is different from true [2023-02-15 22:32:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-02-15 22:32:55,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:32:55,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122809192] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:32:55,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:32:55,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2023-02-15 22:32:55,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321595022] [2023-02-15 22:32:55,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:32:55,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:32:55,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:32:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:32:55,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2023-02-15 22:32:55,412 INFO L87 Difference]: Start difference. First operand 529 states and 626 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:32:55,419 INFO L93 Difference]: Finished difference Result 528 states and 625 transitions. [2023-02-15 22:32:55,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:32:55,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2023-02-15 22:32:55,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:32:55,421 INFO L225 Difference]: With dead ends: 528 [2023-02-15 22:32:55,422 INFO L226 Difference]: Without dead ends: 524 [2023-02-15 22:32:55,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2023-02-15 22:32:55,423 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:32:55,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2023-02-15 22:32:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-02-15 22:32:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2023-02-15 22:32:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 522 states have (on average 1.1877394636015326) internal successors, (620), 523 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:55,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 620 transitions. [2023-02-15 22:32:55,429 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 620 transitions. Word has length 266 [2023-02-15 22:32:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:32:55,429 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 620 transitions. [2023-02-15 22:32:55,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:32:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 620 transitions. [2023-02-15 22:32:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-02-15 22:32:55,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:32:55,431 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:32:55,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 22:32:55,635 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,SelfDestructingSolverStorable10 [2023-02-15 22:32:55,636 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:32:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:32:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1472225807, now seen corresponding path program 1 times [2023-02-15 22:32:55,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:32:55,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232372816] [2023-02-15 22:32:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:55,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:32:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8130 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-02-15 22:32:55,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:32:55,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232372816] [2023-02-15 22:32:55,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232372816] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:32:55,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944682604] [2023-02-15 22:32:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:32:55,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:32:55,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:32:55,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:32:55,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 22:32:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:32:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-15 22:32:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:32:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8130 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:32:57,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:33:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8130 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:33:00,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944682604] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:33:00,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:33:00,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 67, 67] total 134 [2023-02-15 22:33:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624101715] [2023-02-15 22:33:00,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:33:00,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2023-02-15 22:33:00,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:33:00,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2023-02-15 22:33:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2023-02-15 22:33:00,871 INFO L87 Difference]: Start difference. First operand 524 states and 620 transitions. Second operand has 134 states, 134 states have (on average 4.037313432835821) internal successors, (541), 134 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:33:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:33:10,880 INFO L93 Difference]: Finished difference Result 1407 states and 1409 transitions. [2023-02-15 22:33:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2023-02-15 22:33:10,881 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 4.037313432835821) internal successors, (541), 134 states have internal predecessors, (541), 0 states have call successors, (0), 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 269 [2023-02-15 22:33:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:33:10,883 INFO L225 Difference]: With dead ends: 1407 [2023-02-15 22:33:10,883 INFO L226 Difference]: Without dead ends: 1149 [2023-02-15 22:33:10,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10657 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=25808, Invalid=43098, Unknown=0, NotChecked=0, Total=68906 [2023-02-15 22:33:10,902 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3367 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3367 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:33:10,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3367 Valid, 414 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 22:33:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2023-02-15 22:33:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1052. [2023-02-15 22:33:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1050 states have (on average 1.0961904761904762) internal successors, (1151), 1051 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:33:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1151 transitions. [2023-02-15 22:33:10,927 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1151 transitions. Word has length 269 [2023-02-15 22:33:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:33:10,927 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 1151 transitions. [2023-02-15 22:33:10,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 4.037313432835821) internal successors, (541), 134 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:33:10,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1151 transitions. [2023-02-15 22:33:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2023-02-15 22:33:10,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:33:10,934 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 33, 33, 33, 33, 1, 1, 1, 1, 1] [2023-02-15 22:33:10,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 22:33:11,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:33:11,142 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:33:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:33:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash -205306276, now seen corresponding path program 4 times [2023-02-15 22:33:11,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:33:11,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899310795] [2023-02-15 22:33:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:33:11,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:33:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:33:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 35815 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2023-02-15 22:33:21,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:33:21,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899310795] [2023-02-15 22:33:21,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899310795] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:33:21,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914944355] [2023-02-15 22:33:21,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 22:33:21,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:33:21,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:33:21,236 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:33:21,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 22:35:24,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 22:35:24,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:35:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 132 conjunts are in the unsatisfiable core [2023-02-15 22:35:24,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:35:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 35815 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2023-02-15 22:35:24,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:35:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 35815 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2023-02-15 22:35:35,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914944355] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:35:35,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:35:35,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 265 [2023-02-15 22:35:35,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237675252] [2023-02-15 22:35:35,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:35:35,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2023-02-15 22:35:35,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:35:35,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2023-02-15 22:35:35,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2023-02-15 22:35:35,445 INFO L87 Difference]: Start difference. First operand 1052 states and 1151 transitions. Second operand has 265 states, 265 states have (on average 3.9849056603773585) internal successors, (1056), 265 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:36:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:36:25,931 INFO L93 Difference]: Finished difference Result 2865 states and 2867 transitions. [2023-02-15 22:36:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2023-02-15 22:36:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 265 states, 265 states have (on average 3.9849056603773585) internal successors, (1056), 265 states have internal predecessors, (1056), 0 states have call successors, (0), 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 657 [2023-02-15 22:36:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:36:25,937 INFO L225 Difference]: With dead ends: 2865 [2023-02-15 22:36:25,937 INFO L226 Difference]: Without dead ends: 2865 [2023-02-15 22:36:25,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1445 GetRequests, 1182 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2023-02-15 22:36:25,940 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6564 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 1273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6564 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 3236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1273 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-15 22:36:25,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6564 Valid, 952 Invalid, 3236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1273 Valid, 1963 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-15 22:36:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2023-02-15 22:36:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2108. [2023-02-15 22:36:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2106 states have (on average 1.1733143399810066) internal successors, (2471), 2107 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:36:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 2471 transitions. [2023-02-15 22:36:25,960 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 2471 transitions. Word has length 657 [2023-02-15 22:36:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:36:25,961 INFO L495 AbstractCegarLoop]: Abstraction has 2108 states and 2471 transitions. [2023-02-15 22:36:25,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 265 states, 265 states have (on average 3.9849056603773585) internal successors, (1056), 265 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:36:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 2471 transitions. [2023-02-15 22:36:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1186 [2023-02-15 22:36:25,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:36:25,987 INFO L195 NwaCegarLoop]: trace histogram [262, 262, 262, 262, 33, 33, 33, 33, 1, 1, 1, 1, 1] [2023-02-15 22:36:26,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 22:36:26,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 22:36:26,201 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-02-15 22:36:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:36:26,201 INFO L85 PathProgramCache]: Analyzing trace with hash 358047568, now seen corresponding path program 5 times [2023-02-15 22:36:26,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:36:26,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075688621] [2023-02-15 22:36:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:36:26,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:36:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:37:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 139171 backedges. 0 proven. 137026 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2023-02-15 22:37:06,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:37:06,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075688621] [2023-02-15 22:37:06,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075688621] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:37:06,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247469650] [2023-02-15 22:37:06,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 22:37:06,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:37:06,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:37:06,576 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:37:06,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process