./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0214.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/memsafety/test-0214.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 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:51:11,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:51:11,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:51:11,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:51:11,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:51:11,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:51:11,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:51:11,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:51:11,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:51:11,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:51:11,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:51:11,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:51:11,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:51:11,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:51:11,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:51:11,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:51:11,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:51:11,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:51:11,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:51:11,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:51:11,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:51:11,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:51:11,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:51:11,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:51:11,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:51:11,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:51:11,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:51:11,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:51:11,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:51:11,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:51:11,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:51:11,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:51:11,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:51:11,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:51:11,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:51:11,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:51:11,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:51:11,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:51:11,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:51:11,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:51:11,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:51:11,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 21:51:11,460 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:51:11,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:51:11,461 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:51:11,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:51:11,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:51:11,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:51:11,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:51:11,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:51:11,463 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:51:11,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:51:11,464 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:51:11,465 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 21:51:11,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:51:11,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:51:11,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:51:11,465 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 21:51:11,466 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 21:51:11,466 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 21:51:11,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:51:11,466 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 21:51:11,466 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:51:11,467 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:51:11,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:51:11,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:51:11,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:51:11,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:51:11,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:51:11,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:51:11,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:51:11,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:51:11,469 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:51:11,469 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:51:11,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:51:11,470 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:51:11,470 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 [2023-02-15 21:51:11,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:51:11,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:51:11,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:51:11,790 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:51:11,790 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:51:11,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0214.i [2023-02-15 21:51:12,972 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:51:13,290 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:51:13,290 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0214.i [2023-02-15 21:51:13,306 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e3a7643/04cf66b54c1144398e7452cbaabf3a91/FLAGafaa9e5d2 [2023-02-15 21:51:13,323 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e3a7643/04cf66b54c1144398e7452cbaabf3a91 [2023-02-15 21:51:13,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:51:13,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:51:13,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:51:13,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:51:13,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:51:13,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1204f0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13, skipping insertion in model container [2023-02-15 21:51:13,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:51:13,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:51:13,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:51:13,778 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:51:13,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:51:13,850 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:51:13,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13 WrapperNode [2023-02-15 21:51:13,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:51:13,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:51:13,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:51:13,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:51:13,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,913 INFO L138 Inliner]: procedures = 181, calls = 42, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 173 [2023-02-15 21:51:13,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:51:13,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:51:13,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:51:13,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:51:13,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,944 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:51:13,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:51:13,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:51:13,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:51:13,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (1/1) ... [2023-02-15 21:51:13,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:51:13,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:51:13,992 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 21:51:13,994 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 21:51:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-15 21:51:14,028 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-15 21:51:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 21:51:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 21:51:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:51:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 21:51:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 21:51:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 21:51:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 21:51:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:51:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:51:14,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:51:14,228 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:51:14,231 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:51:14,637 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:51:14,645 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:51:14,649 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 21:51:14,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:51:14 BoogieIcfgContainer [2023-02-15 21:51:14,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:51:14,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:51:14,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:51:14,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:51:14,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:51:13" (1/3) ... [2023-02-15 21:51:14,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1815fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:51:14, skipping insertion in model container [2023-02-15 21:51:14,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:51:13" (2/3) ... [2023-02-15 21:51:14,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1815fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:51:14, skipping insertion in model container [2023-02-15 21:51:14,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:51:14" (3/3) ... [2023-02-15 21:51:14,667 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214.i [2023-02-15 21:51:14,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:51:14,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2023-02-15 21:51:14,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:51:14,748 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;@8ca0198, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:51:14,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-02-15 21:51:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 138 states have internal predecessors, (158), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:51:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 21:51:14,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:14,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 21:51:14,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1072948778, now seen corresponding path program 1 times [2023-02-15 21:51:14,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:14,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091739082] [2023-02-15 21:51:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:14,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:14,933 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 21:51:14,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091739082] [2023-02-15 21:51:14,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091739082] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:14,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:14,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:51:14,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122702884] [2023-02-15 21:51:14,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:14,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 21:51:14,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 21:51:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:51:14,976 INFO L87 Difference]: Start difference. First operand has 142 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 138 states have internal predecessors, (158), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 21:51:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:15,009 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2023-02-15 21:51:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 21:51:15,011 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-15 21:51:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:15,022 INFO L225 Difference]: With dead ends: 142 [2023-02-15 21:51:15,022 INFO L226 Difference]: Without dead ends: 140 [2023-02-15 21:51:15,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:51:15,029 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:15,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:51:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-15 21:51:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-02-15 21:51:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 80 states have (on average 1.8875) internal successors, (151), 136 states have internal predecessors, (151), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:51:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 155 transitions. [2023-02-15 21:51:15,082 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 155 transitions. Word has length 6 [2023-02-15 21:51:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:15,082 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 155 transitions. [2023-02-15 21:51:15,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 21:51:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 155 transitions. [2023-02-15 21:51:15,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 21:51:15,084 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:15,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:15,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 21:51:15,085 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1280381875, now seen corresponding path program 1 times [2023-02-15 21:51:15,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:15,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307179740] [2023-02-15 21:51:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:15,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:15,235 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 21:51:15,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:15,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307179740] [2023-02-15 21:51:15,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307179740] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:15,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:15,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-15 21:51:15,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486209604] [2023-02-15 21:51:15,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:15,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 21:51:15,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:15,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 21:51:15,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 21:51:15,240 INFO L87 Difference]: Start difference. First operand 140 states and 155 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:15,485 INFO L93 Difference]: Finished difference Result 271 states and 300 transitions. [2023-02-15 21:51:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 21:51:15,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 21:51:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:15,488 INFO L225 Difference]: With dead ends: 271 [2023-02-15 21:51:15,491 INFO L226 Difference]: Without dead ends: 271 [2023-02-15 21:51:15,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 21:51:15,495 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 136 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:15,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 197 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-02-15 21:51:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 189. [2023-02-15 21:51:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 126 states have (on average 1.8571428571428572) internal successors, (234), 182 states have internal predecessors, (234), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:51:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 242 transitions. [2023-02-15 21:51:15,514 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 242 transitions. Word has length 7 [2023-02-15 21:51:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:15,515 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 242 transitions. [2023-02-15 21:51:15,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 242 transitions. [2023-02-15 21:51:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 21:51:15,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:15,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:15,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:51:15,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1280381874, now seen corresponding path program 1 times [2023-02-15 21:51:15,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:15,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252126420] [2023-02-15 21:51:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:15,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:15,677 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 21:51:15,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:15,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252126420] [2023-02-15 21:51:15,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252126420] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:15,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:15,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:51:15,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653184892] [2023-02-15 21:51:15,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:15,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:51:15,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:51:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:15,681 INFO L87 Difference]: Start difference. First operand 189 states and 242 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:15,889 INFO L93 Difference]: Finished difference Result 334 states and 412 transitions. [2023-02-15 21:51:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:51:15,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 21:51:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:15,893 INFO L225 Difference]: With dead ends: 334 [2023-02-15 21:51:15,893 INFO L226 Difference]: Without dead ends: 334 [2023-02-15 21:51:15,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 21:51:15,894 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 139 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:15,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 329 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:15,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-02-15 21:51:15,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 262. [2023-02-15 21:51:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 193 states have (on average 1.8186528497409327) internal successors, (351), 251 states have internal predecessors, (351), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 21:51:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 367 transitions. [2023-02-15 21:51:15,917 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 367 transitions. Word has length 7 [2023-02-15 21:51:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:15,917 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 367 transitions. [2023-02-15 21:51:15,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 367 transitions. [2023-02-15 21:51:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 21:51:15,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:15,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:15,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 21:51:15,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:15,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1280381812, now seen corresponding path program 1 times [2023-02-15 21:51:15,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:15,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281033410] [2023-02-15 21:51:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:15,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:16,053 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 21:51:16,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:16,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281033410] [2023-02-15 21:51:16,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281033410] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:16,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:16,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:51:16,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635307010] [2023-02-15 21:51:16,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:16,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:51:16,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:51:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:16,056 INFO L87 Difference]: Start difference. First operand 262 states and 367 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:16,232 INFO L93 Difference]: Finished difference Result 333 states and 410 transitions. [2023-02-15 21:51:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:51:16,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 21:51:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:16,237 INFO L225 Difference]: With dead ends: 333 [2023-02-15 21:51:16,238 INFO L226 Difference]: Without dead ends: 333 [2023-02-15 21:51:16,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 21:51:16,248 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 121 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:16,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 343 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-02-15 21:51:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 262. [2023-02-15 21:51:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 193 states have (on average 1.8186528497409327) internal successors, (351), 251 states have internal predecessors, (351), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 21:51:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 367 transitions. [2023-02-15 21:51:16,277 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 367 transitions. Word has length 7 [2023-02-15 21:51:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:16,277 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 367 transitions. [2023-02-15 21:51:16,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 367 transitions. [2023-02-15 21:51:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 21:51:16,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:16,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:16,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 21:51:16,279 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:16,280 INFO L85 PathProgramCache]: Analyzing trace with hash -251697362, now seen corresponding path program 1 times [2023-02-15 21:51:16,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:16,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077077211] [2023-02-15 21:51:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:16,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:16,490 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 21:51:16,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:16,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077077211] [2023-02-15 21:51:16,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077077211] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:16,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:16,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:51:16,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428547603] [2023-02-15 21:51:16,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:16,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:51:16,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:16,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:51:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:51:16,492 INFO L87 Difference]: Start difference. First operand 262 states and 367 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:16,739 INFO L93 Difference]: Finished difference Result 379 states and 501 transitions. [2023-02-15 21:51:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:51:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 21:51:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:16,743 INFO L225 Difference]: With dead ends: 379 [2023-02-15 21:51:16,744 INFO L226 Difference]: Without dead ends: 379 [2023-02-15 21:51:16,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:51:16,745 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 124 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:16,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 642 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-02-15 21:51:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 304. [2023-02-15 21:51:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 232 states have (on average 1.8017241379310345) internal successors, (418), 291 states have internal predecessors, (418), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:51:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 438 transitions. [2023-02-15 21:51:16,755 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 438 transitions. Word has length 10 [2023-02-15 21:51:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:16,756 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 438 transitions. [2023-02-15 21:51:16,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:16,756 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 438 transitions. [2023-02-15 21:51:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 21:51:16,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:16,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:16,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 21:51:16,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:16,757 INFO L85 PathProgramCache]: Analyzing trace with hash -249850320, now seen corresponding path program 1 times [2023-02-15 21:51:16,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:16,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536056653] [2023-02-15 21:51:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:16,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:16,888 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 21:51:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:16,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536056653] [2023-02-15 21:51:16,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536056653] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:16,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:16,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:51:16,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350495123] [2023-02-15 21:51:16,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:16,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:51:16,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:51:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:51:16,890 INFO L87 Difference]: Start difference. First operand 304 states and 438 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:17,041 INFO L93 Difference]: Finished difference Result 369 states and 490 transitions. [2023-02-15 21:51:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:51:17,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 21:51:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:17,044 INFO L225 Difference]: With dead ends: 369 [2023-02-15 21:51:17,044 INFO L226 Difference]: Without dead ends: 369 [2023-02-15 21:51:17,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:51:17,045 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 103 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:17,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 659 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-02-15 21:51:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 303. [2023-02-15 21:51:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 231 states have (on average 1.8051948051948052) internal successors, (417), 290 states have internal predecessors, (417), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:51:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 437 transitions. [2023-02-15 21:51:17,058 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 437 transitions. Word has length 10 [2023-02-15 21:51:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:17,058 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 437 transitions. [2023-02-15 21:51:17,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 437 transitions. [2023-02-15 21:51:17,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 21:51:17,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:17,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:17,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 21:51:17,060 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash 787315061, now seen corresponding path program 1 times [2023-02-15 21:51:17,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:17,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555870869] [2023-02-15 21:51:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:17,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:17,086 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 21:51:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555870869] [2023-02-15 21:51:17,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555870869] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:17,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:17,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:51:17,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629591179] [2023-02-15 21:51:17,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:17,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 21:51:17,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:17,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 21:51:17,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 21:51:17,089 INFO L87 Difference]: Start difference. First operand 303 states and 437 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:17,178 INFO L93 Difference]: Finished difference Result 358 states and 488 transitions. [2023-02-15 21:51:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 21:51:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 21:51:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:17,180 INFO L225 Difference]: With dead ends: 358 [2023-02-15 21:51:17,181 INFO L226 Difference]: Without dead ends: 351 [2023-02-15 21:51:17,181 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 21:51:17,182 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 68 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:17,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 225 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-02-15 21:51:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 300. [2023-02-15 21:51:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 228 states have (on average 1.8070175438596492) internal successors, (412), 287 states have internal predecessors, (412), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:51:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 432 transitions. [2023-02-15 21:51:17,191 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 432 transitions. Word has length 11 [2023-02-15 21:51:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:17,191 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 432 transitions. [2023-02-15 21:51:17,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:51:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 432 transitions. [2023-02-15 21:51:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 21:51:17,192 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:17,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:17,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 21:51:17,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:17,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:17,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1918130468, now seen corresponding path program 1 times [2023-02-15 21:51:17,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:17,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165714948] [2023-02-15 21:51:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:17,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:17,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:17,272 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 21:51:17,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165714948] [2023-02-15 21:51:17,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165714948] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:17,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:17,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:51:17,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714568444] [2023-02-15 21:51:17,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:17,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:51:17,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:17,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:51:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:17,274 INFO L87 Difference]: Start difference. First operand 300 states and 432 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:17,479 INFO L93 Difference]: Finished difference Result 423 states and 528 transitions. [2023-02-15 21:51:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:51:17,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-15 21:51:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:17,482 INFO L225 Difference]: With dead ends: 423 [2023-02-15 21:51:17,482 INFO L226 Difference]: Without dead ends: 423 [2023-02-15 21:51:17,482 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 21:51:17,483 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 255 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:17,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 329 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-02-15 21:51:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 300. [2023-02-15 21:51:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 228 states have (on average 1.780701754385965) internal successors, (406), 287 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:51:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 426 transitions. [2023-02-15 21:51:17,492 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 426 transitions. Word has length 13 [2023-02-15 21:51:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:17,492 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 426 transitions. [2023-02-15 21:51:17,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 426 transitions. [2023-02-15 21:51:17,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 21:51:17,493 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:17,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:17,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 21:51:17,494 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:17,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1918130467, now seen corresponding path program 1 times [2023-02-15 21:51:17,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:17,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56898374] [2023-02-15 21:51:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:17,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:17,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:17,642 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 21:51:17,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:17,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56898374] [2023-02-15 21:51:17,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56898374] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:17,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:17,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:51:17,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066436761] [2023-02-15 21:51:17,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:17,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:51:17,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:17,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:51:17,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:51:17,645 INFO L87 Difference]: Start difference. First operand 300 states and 426 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:17,890 INFO L93 Difference]: Finished difference Result 370 states and 472 transitions. [2023-02-15 21:51:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 21:51:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-15 21:51:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:17,893 INFO L225 Difference]: With dead ends: 370 [2023-02-15 21:51:17,893 INFO L226 Difference]: Without dead ends: 370 [2023-02-15 21:51:17,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:51:17,894 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 112 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:17,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 608 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-02-15 21:51:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 310. [2023-02-15 21:51:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 235 states have (on average 1.7617021276595746) internal successors, (414), 295 states have internal predecessors, (414), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 21:51:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 440 transitions. [2023-02-15 21:51:17,910 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 440 transitions. Word has length 13 [2023-02-15 21:51:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:17,911 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 440 transitions. [2023-02-15 21:51:17,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 440 transitions. [2023-02-15 21:51:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 21:51:17,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:17,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:17,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 21:51:17,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:17,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1917206946, now seen corresponding path program 1 times [2023-02-15 21:51:17,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:17,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79564870] [2023-02-15 21:51:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:17,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:18,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:18,061 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 21:51:18,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79564870] [2023-02-15 21:51:18,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79564870] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:18,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:18,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:51:18,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712401292] [2023-02-15 21:51:18,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:18,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:51:18,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:18,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:51:18,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:51:18,064 INFO L87 Difference]: Start difference. First operand 310 states and 440 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:18,292 INFO L93 Difference]: Finished difference Result 369 states and 470 transitions. [2023-02-15 21:51:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 21:51:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-15 21:51:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:18,294 INFO L225 Difference]: With dead ends: 369 [2023-02-15 21:51:18,294 INFO L226 Difference]: Without dead ends: 369 [2023-02-15 21:51:18,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:51:18,295 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 107 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:18,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 630 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-02-15 21:51:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 304. [2023-02-15 21:51:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 232 states have (on average 1.771551724137931) internal successors, (411), 289 states have internal predecessors, (411), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:51:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 431 transitions. [2023-02-15 21:51:18,304 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 431 transitions. Word has length 13 [2023-02-15 21:51:18,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:18,304 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 431 transitions. [2023-02-15 21:51:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 431 transitions. [2023-02-15 21:51:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 21:51:18,305 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:18,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:18,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 21:51:18,306 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:18,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:18,306 INFO L85 PathProgramCache]: Analyzing trace with hash 398929757, now seen corresponding path program 1 times [2023-02-15 21:51:18,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:18,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66331556] [2023-02-15 21:51:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:18,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:18,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:51:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:18,359 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 21:51:18,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:18,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66331556] [2023-02-15 21:51:18,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66331556] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:18,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:18,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:51:18,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417297060] [2023-02-15 21:51:18,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:18,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:51:18,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:18,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:51:18,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:18,361 INFO L87 Difference]: Start difference. First operand 304 states and 431 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:18,552 INFO L93 Difference]: Finished difference Result 473 states and 618 transitions. [2023-02-15 21:51:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:51:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-15 21:51:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:18,555 INFO L225 Difference]: With dead ends: 473 [2023-02-15 21:51:18,555 INFO L226 Difference]: Without dead ends: 473 [2023-02-15 21:51:18,555 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 21:51:18,556 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 247 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:18,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 342 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-02-15 21:51:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 310. [2023-02-15 21:51:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 238 states have (on average 1.7521008403361344) internal successors, (417), 295 states have internal predecessors, (417), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:51:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2023-02-15 21:51:18,566 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 15 [2023-02-15 21:51:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:18,567 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2023-02-15 21:51:18,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2023-02-15 21:51:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 21:51:18,567 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:18,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:18,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 21:51:18,568 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash 398929758, now seen corresponding path program 1 times [2023-02-15 21:51:18,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:18,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877596555] [2023-02-15 21:51:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:18,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:51:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:18,656 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 21:51:18,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:18,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877596555] [2023-02-15 21:51:18,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877596555] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:18,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:18,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:51:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117565964] [2023-02-15 21:51:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:18,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:51:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:51:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:18,658 INFO L87 Difference]: Start difference. First operand 310 states and 437 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:18,805 INFO L93 Difference]: Finished difference Result 367 states and 461 transitions. [2023-02-15 21:51:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:51:18,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-15 21:51:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:18,808 INFO L225 Difference]: With dead ends: 367 [2023-02-15 21:51:18,808 INFO L226 Difference]: Without dead ends: 367 [2023-02-15 21:51:18,808 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 21:51:18,809 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 191 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:18,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 356 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:18,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-15 21:51:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 310. [2023-02-15 21:51:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 238 states have (on average 1.7142857142857142) internal successors, (408), 295 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:51:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 428 transitions. [2023-02-15 21:51:18,818 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 428 transitions. Word has length 15 [2023-02-15 21:51:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:18,818 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 428 transitions. [2023-02-15 21:51:18,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 428 transitions. [2023-02-15 21:51:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 21:51:18,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:18,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:18,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 21:51:18,822 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash 688488293, now seen corresponding path program 1 times [2023-02-15 21:51:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:18,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343117502] [2023-02-15 21:51:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:18,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:18,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:18,855 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 21:51:18,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343117502] [2023-02-15 21:51:18,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343117502] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:18,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:18,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:51:18,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197700924] [2023-02-15 21:51:18,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:18,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 21:51:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:18,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 21:51:18,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 21:51:18,857 INFO L87 Difference]: Start difference. First operand 310 states and 428 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:18,945 INFO L93 Difference]: Finished difference Result 397 states and 521 transitions. [2023-02-15 21:51:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 21:51:18,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-15 21:51:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:18,947 INFO L225 Difference]: With dead ends: 397 [2023-02-15 21:51:18,947 INFO L226 Difference]: Without dead ends: 397 [2023-02-15 21:51:18,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 21:51:18,948 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 126 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:18,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 243 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-02-15 21:51:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 307. [2023-02-15 21:51:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 238 states have (on average 1.6890756302521008) internal successors, (402), 292 states have internal predecessors, (402), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:51:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 422 transitions. [2023-02-15 21:51:18,957 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 422 transitions. Word has length 19 [2023-02-15 21:51:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:18,957 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 422 transitions. [2023-02-15 21:51:18,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 422 transitions. [2023-02-15 21:51:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 21:51:18,958 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:18,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:18,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 21:51:18,958 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:18,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:18,959 INFO L85 PathProgramCache]: Analyzing trace with hash 688488294, now seen corresponding path program 1 times [2023-02-15 21:51:18,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:18,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182582310] [2023-02-15 21:51:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:18,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:19,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:19,024 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 21:51:19,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:19,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182582310] [2023-02-15 21:51:19,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182582310] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:19,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:19,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:51:19,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831978191] [2023-02-15 21:51:19,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:19,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:51:19,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:51:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:19,026 INFO L87 Difference]: Start difference. First operand 307 states and 422 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:19,182 INFO L93 Difference]: Finished difference Result 520 states and 644 transitions. [2023-02-15 21:51:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:51:19,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-15 21:51:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:19,185 INFO L225 Difference]: With dead ends: 520 [2023-02-15 21:51:19,185 INFO L226 Difference]: Without dead ends: 520 [2023-02-15 21:51:19,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:19,185 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 269 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:19,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 424 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-02-15 21:51:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 310. [2023-02-15 21:51:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 242 states have (on average 1.6694214876033058) internal successors, (404), 295 states have internal predecessors, (404), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:51:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 424 transitions. [2023-02-15 21:51:19,197 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 424 transitions. Word has length 19 [2023-02-15 21:51:19,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:19,198 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 424 transitions. [2023-02-15 21:51:19,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 424 transitions. [2023-02-15 21:51:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 21:51:19,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:19,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:19,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-15 21:51:19,200 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash -131699369, now seen corresponding path program 1 times [2023-02-15 21:51:19,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:19,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600660271] [2023-02-15 21:51:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:19,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:19,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:19,293 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 21:51:19,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:19,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600660271] [2023-02-15 21:51:19,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600660271] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:19,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:19,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:51:19,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24016754] [2023-02-15 21:51:19,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:19,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:51:19,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:51:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:19,295 INFO L87 Difference]: Start difference. First operand 310 states and 424 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:19,454 INFO L93 Difference]: Finished difference Result 519 states and 642 transitions. [2023-02-15 21:51:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:51:19,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-15 21:51:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:19,458 INFO L225 Difference]: With dead ends: 519 [2023-02-15 21:51:19,458 INFO L226 Difference]: Without dead ends: 519 [2023-02-15 21:51:19,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:19,460 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 267 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:19,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 468 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-02-15 21:51:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 312. [2023-02-15 21:51:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 244 states have (on average 1.6639344262295082) internal successors, (406), 297 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:51:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 426 transitions. [2023-02-15 21:51:19,470 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 426 transitions. Word has length 20 [2023-02-15 21:51:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:19,470 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 426 transitions. [2023-02-15 21:51:19,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 426 transitions. [2023-02-15 21:51:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 21:51:19,472 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:19,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:19,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 21:51:19,472 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash -131643665, now seen corresponding path program 1 times [2023-02-15 21:51:19,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:19,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692447712] [2023-02-15 21:51:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:19,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:19,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:19,585 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 21:51:19,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:19,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692447712] [2023-02-15 21:51:19,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692447712] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:19,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:19,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 21:51:19,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089326972] [2023-02-15 21:51:19,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:19,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:51:19,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:19,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:51:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:19,589 INFO L87 Difference]: Start difference. First operand 312 states and 426 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:19,742 INFO L93 Difference]: Finished difference Result 528 states and 695 transitions. [2023-02-15 21:51:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:51:19,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-15 21:51:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:19,745 INFO L225 Difference]: With dead ends: 528 [2023-02-15 21:51:19,745 INFO L226 Difference]: Without dead ends: 528 [2023-02-15 21:51:19,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:51:19,746 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 325 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:19,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1068 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-02-15 21:51:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 340. [2023-02-15 21:51:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 267 states have (on average 1.6292134831460674) internal successors, (435), 321 states have internal predecessors, (435), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 465 transitions. [2023-02-15 21:51:19,756 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 465 transitions. Word has length 20 [2023-02-15 21:51:19,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:19,756 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 465 transitions. [2023-02-15 21:51:19,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 465 transitions. [2023-02-15 21:51:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 21:51:19,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:19,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:19,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 21:51:19,757 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:19,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:19,757 INFO L85 PathProgramCache]: Analyzing trace with hash -131641743, now seen corresponding path program 1 times [2023-02-15 21:51:19,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:19,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233409006] [2023-02-15 21:51:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:19,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:19,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:19,857 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 21:51:19,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:19,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233409006] [2023-02-15 21:51:19,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233409006] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:19,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:19,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 21:51:19,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236676908] [2023-02-15 21:51:19,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:19,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:51:19,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:19,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:51:19,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:19,859 INFO L87 Difference]: Start difference. First operand 340 states and 465 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:19,992 INFO L93 Difference]: Finished difference Result 518 states and 681 transitions. [2023-02-15 21:51:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:51:19,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-15 21:51:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:19,994 INFO L225 Difference]: With dead ends: 518 [2023-02-15 21:51:19,995 INFO L226 Difference]: Without dead ends: 518 [2023-02-15 21:51:19,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:51:19,995 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 312 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:19,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1076 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-02-15 21:51:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 338. [2023-02-15 21:51:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 265 states have (on average 1.6264150943396227) internal successors, (431), 319 states have internal predecessors, (431), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 461 transitions. [2023-02-15 21:51:20,006 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 461 transitions. Word has length 20 [2023-02-15 21:51:20,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:20,006 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 461 transitions. [2023-02-15 21:51:20,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 461 transitions. [2023-02-15 21:51:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 21:51:20,007 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:20,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:20,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 21:51:20,008 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:20,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2560946, now seen corresponding path program 1 times [2023-02-15 21:51:20,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:20,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322027899] [2023-02-15 21:51:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:20,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:20,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:20,075 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 21:51:20,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:20,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322027899] [2023-02-15 21:51:20,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322027899] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:20,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:20,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:51:20,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049062040] [2023-02-15 21:51:20,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:20,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:51:20,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:51:20,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:20,078 INFO L87 Difference]: Start difference. First operand 338 states and 461 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:20,218 INFO L93 Difference]: Finished difference Result 560 states and 700 transitions. [2023-02-15 21:51:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:51:20,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-15 21:51:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:20,221 INFO L225 Difference]: With dead ends: 560 [2023-02-15 21:51:20,222 INFO L226 Difference]: Without dead ends: 560 [2023-02-15 21:51:20,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:20,222 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 270 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:20,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 448 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-02-15 21:51:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 342. [2023-02-15 21:51:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 269 states have (on average 1.6171003717472119) internal successors, (435), 323 states have internal predecessors, (435), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 465 transitions. [2023-02-15 21:51:20,245 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 465 transitions. Word has length 20 [2023-02-15 21:51:20,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:20,245 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 465 transitions. [2023-02-15 21:51:20,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:20,245 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 465 transitions. [2023-02-15 21:51:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 21:51:20,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:20,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:20,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 21:51:20,246 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:20,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2559024, now seen corresponding path program 1 times [2023-02-15 21:51:20,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:20,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230823693] [2023-02-15 21:51:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:20,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:20,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:20,356 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 21:51:20,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:20,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230823693] [2023-02-15 21:51:20,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230823693] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:20,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:20,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 21:51:20,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200704804] [2023-02-15 21:51:20,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:20,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:51:20,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:51:20,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:20,359 INFO L87 Difference]: Start difference. First operand 342 states and 465 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:20,490 INFO L93 Difference]: Finished difference Result 515 states and 675 transitions. [2023-02-15 21:51:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:51:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-15 21:51:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:20,493 INFO L225 Difference]: With dead ends: 515 [2023-02-15 21:51:20,493 INFO L226 Difference]: Without dead ends: 515 [2023-02-15 21:51:20,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:51:20,494 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 318 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:20,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1304 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-02-15 21:51:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 337. [2023-02-15 21:51:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 265 states have (on average 1.6113207547169812) internal successors, (427), 318 states have internal predecessors, (427), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 457 transitions. [2023-02-15 21:51:20,508 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 457 transitions. Word has length 20 [2023-02-15 21:51:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:20,508 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 457 transitions. [2023-02-15 21:51:20,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 457 transitions. [2023-02-15 21:51:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 21:51:20,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:20,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:20,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 21:51:20,509 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:20,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:20,510 INFO L85 PathProgramCache]: Analyzing trace with hash 59872289, now seen corresponding path program 1 times [2023-02-15 21:51:20,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:20,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322364769] [2023-02-15 21:51:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:20,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:20,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:51:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:20,872 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 21:51:20,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:20,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322364769] [2023-02-15 21:51:20,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322364769] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:20,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:20,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 21:51:20,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799671277] [2023-02-15 21:51:20,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:20,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 21:51:20,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:20,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 21:51:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:51:20,874 INFO L87 Difference]: Start difference. First operand 337 states and 457 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:21,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:21,479 INFO L93 Difference]: Finished difference Result 629 states and 815 transitions. [2023-02-15 21:51:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:51:21,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-15 21:51:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:21,482 INFO L225 Difference]: With dead ends: 629 [2023-02-15 21:51:21,482 INFO L226 Difference]: Without dead ends: 627 [2023-02-15 21:51:21,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:51:21,483 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 421 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:21,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1122 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:51:21,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2023-02-15 21:51:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 331. [2023-02-15 21:51:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 259 states have (on average 1.606177606177606) internal successors, (416), 312 states have internal predecessors, (416), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 446 transitions. [2023-02-15 21:51:21,495 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 446 transitions. Word has length 21 [2023-02-15 21:51:21,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:21,495 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 446 transitions. [2023-02-15 21:51:21,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 446 transitions. [2023-02-15 21:51:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 21:51:21,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:21,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:21,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 21:51:21,497 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash -79389329, now seen corresponding path program 1 times [2023-02-15 21:51:21,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:21,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232978651] [2023-02-15 21:51:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:21,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:21,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:21,579 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 21:51:21,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:21,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232978651] [2023-02-15 21:51:21,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232978651] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:21,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:21,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:51:21,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542169219] [2023-02-15 21:51:21,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:21,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:51:21,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:21,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:51:21,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:21,583 INFO L87 Difference]: Start difference. First operand 331 states and 446 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:21,739 INFO L93 Difference]: Finished difference Result 545 states and 675 transitions. [2023-02-15 21:51:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:51:21,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-15 21:51:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:21,741 INFO L225 Difference]: With dead ends: 545 [2023-02-15 21:51:21,742 INFO L226 Difference]: Without dead ends: 545 [2023-02-15 21:51:21,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:21,742 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 328 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:21,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 402 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-02-15 21:51:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 324. [2023-02-15 21:51:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 253 states have (on average 1.6126482213438735) internal successors, (408), 305 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 438 transitions. [2023-02-15 21:51:21,755 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 438 transitions. Word has length 21 [2023-02-15 21:51:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:21,756 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 438 transitions. [2023-02-15 21:51:21,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 438 transitions. [2023-02-15 21:51:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 21:51:21,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:21,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:21,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 21:51:21,757 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:21,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1710334668, now seen corresponding path program 1 times [2023-02-15 21:51:21,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:21,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802921605] [2023-02-15 21:51:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:21,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:21,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:51:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:21,803 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 21:51:21,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:21,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802921605] [2023-02-15 21:51:21,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802921605] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:21,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:21,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:51:21,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174951884] [2023-02-15 21:51:21,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:21,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:51:21,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:21,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:51:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:51:21,806 INFO L87 Difference]: Start difference. First operand 324 states and 438 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:21,982 INFO L93 Difference]: Finished difference Result 478 states and 615 transitions. [2023-02-15 21:51:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:51:21,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-15 21:51:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:21,985 INFO L225 Difference]: With dead ends: 478 [2023-02-15 21:51:21,985 INFO L226 Difference]: Without dead ends: 478 [2023-02-15 21:51:21,985 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 21:51:21,986 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 215 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:21,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 334 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-02-15 21:51:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 344. [2023-02-15 21:51:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 273 states have (on average 1.641025641025641) internal successors, (448), 325 states have internal predecessors, (448), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:22,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 478 transitions. [2023-02-15 21:51:22,002 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 478 transitions. Word has length 23 [2023-02-15 21:51:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:22,002 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 478 transitions. [2023-02-15 21:51:22,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:22,003 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 478 transitions. [2023-02-15 21:51:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 21:51:22,003 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:22,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:22,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 21:51:22,003 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:22,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1710334669, now seen corresponding path program 1 times [2023-02-15 21:51:22,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:22,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638887552] [2023-02-15 21:51:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:22,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:22,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:51:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:22,154 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 21:51:22,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:22,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638887552] [2023-02-15 21:51:22,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638887552] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:22,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:22,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:51:22,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031759064] [2023-02-15 21:51:22,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:22,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:51:22,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:22,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:51:22,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:51:22,157 INFO L87 Difference]: Start difference. First operand 344 states and 478 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:22,374 INFO L93 Difference]: Finished difference Result 403 states and 509 transitions. [2023-02-15 21:51:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:51:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-15 21:51:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:22,376 INFO L225 Difference]: With dead ends: 403 [2023-02-15 21:51:22,376 INFO L226 Difference]: Without dead ends: 403 [2023-02-15 21:51:22,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:51:22,376 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 352 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:22,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 415 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-02-15 21:51:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 344. [2023-02-15 21:51:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 273 states have (on average 1.6080586080586081) internal successors, (439), 325 states have internal predecessors, (439), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 469 transitions. [2023-02-15 21:51:22,385 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 469 transitions. Word has length 23 [2023-02-15 21:51:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:22,386 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 469 transitions. [2023-02-15 21:51:22,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 469 transitions. [2023-02-15 21:51:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 21:51:22,387 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:22,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:22,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 21:51:22,388 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:22,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2045900250, now seen corresponding path program 1 times [2023-02-15 21:51:22,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:22,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191117688] [2023-02-15 21:51:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:22,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:22,685 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 21:51:22,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:22,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191117688] [2023-02-15 21:51:22,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191117688] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:22,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:22,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 21:51:22,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220904375] [2023-02-15 21:51:22,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:22,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:51:22,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:22,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:51:22,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:51:22,688 INFO L87 Difference]: Start difference. First operand 344 states and 469 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:23,068 INFO L93 Difference]: Finished difference Result 763 states and 983 transitions. [2023-02-15 21:51:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:51:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-15 21:51:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:23,070 INFO L225 Difference]: With dead ends: 763 [2023-02-15 21:51:23,071 INFO L226 Difference]: Without dead ends: 763 [2023-02-15 21:51:23,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:51:23,071 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 370 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:23,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1288 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2023-02-15 21:51:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 376. [2023-02-15 21:51:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 305 states have (on average 1.5573770491803278) internal successors, (475), 355 states have internal predecessors, (475), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 505 transitions. [2023-02-15 21:51:23,081 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 505 transitions. Word has length 24 [2023-02-15 21:51:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:23,081 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 505 transitions. [2023-02-15 21:51:23,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:23,082 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 505 transitions. [2023-02-15 21:51:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 21:51:23,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:23,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:23,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-15 21:51:23,083 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:23,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1674205682, now seen corresponding path program 1 times [2023-02-15 21:51:23,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:23,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152176727] [2023-02-15 21:51:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:23,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:23,323 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 21:51:23,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:23,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152176727] [2023-02-15 21:51:23,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152176727] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:23,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:23,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 21:51:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113116395] [2023-02-15 21:51:23,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:23,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:51:23,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:23,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:51:23,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:51:23,326 INFO L87 Difference]: Start difference. First operand 376 states and 505 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:23,622 INFO L93 Difference]: Finished difference Result 604 states and 769 transitions. [2023-02-15 21:51:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:51:23,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-15 21:51:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:23,624 INFO L225 Difference]: With dead ends: 604 [2023-02-15 21:51:23,625 INFO L226 Difference]: Without dead ends: 604 [2023-02-15 21:51:23,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:51:23,625 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 230 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:23,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1361 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2023-02-15 21:51:23,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 378. [2023-02-15 21:51:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 307 states have (on average 1.5537459283387622) internal successors, (477), 357 states have internal predecessors, (477), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 507 transitions. [2023-02-15 21:51:23,643 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 507 transitions. Word has length 25 [2023-02-15 21:51:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:23,643 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 507 transitions. [2023-02-15 21:51:23,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 507 transitions. [2023-02-15 21:51:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 21:51:23,644 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:23,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:23,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 21:51:23,645 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:23,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1383181005, now seen corresponding path program 1 times [2023-02-15 21:51:23,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:23,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299691192] [2023-02-15 21:51:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:23,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:23,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:51:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:23,749 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 21:51:23,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:23,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299691192] [2023-02-15 21:51:23,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299691192] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:23,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:23,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:51:23,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571529481] [2023-02-15 21:51:23,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:23,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:51:23,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:51:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:23,752 INFO L87 Difference]: Start difference. First operand 378 states and 507 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:24,061 INFO L93 Difference]: Finished difference Result 897 states and 1200 transitions. [2023-02-15 21:51:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:51:24,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-15 21:51:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:24,064 INFO L225 Difference]: With dead ends: 897 [2023-02-15 21:51:24,064 INFO L226 Difference]: Without dead ends: 897 [2023-02-15 21:51:24,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:51:24,065 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 428 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:24,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 1159 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-02-15 21:51:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 473. [2023-02-15 21:51:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 402 states have (on average 1.5746268656716418) internal successors, (633), 447 states have internal predecessors, (633), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 20 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 663 transitions. [2023-02-15 21:51:24,080 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 663 transitions. Word has length 26 [2023-02-15 21:51:24,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:24,080 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 663 transitions. [2023-02-15 21:51:24,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 663 transitions. [2023-02-15 21:51:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 21:51:24,081 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:24,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:24,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 21:51:24,081 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:24,082 INFO L85 PathProgramCache]: Analyzing trace with hash 872646828, now seen corresponding path program 1 times [2023-02-15 21:51:24,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:24,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432031267] [2023-02-15 21:51:24,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:24,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:24,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:51:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:24,188 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 21:51:24,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:24,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432031267] [2023-02-15 21:51:24,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432031267] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:24,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:24,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:51:24,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126802271] [2023-02-15 21:51:24,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:24,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:51:24,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:24,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:51:24,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:24,190 INFO L87 Difference]: Start difference. First operand 473 states and 663 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:24,532 INFO L93 Difference]: Finished difference Result 894 states and 1190 transitions. [2023-02-15 21:51:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:51:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-15 21:51:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:24,535 INFO L225 Difference]: With dead ends: 894 [2023-02-15 21:51:24,536 INFO L226 Difference]: Without dead ends: 894 [2023-02-15 21:51:24,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:51:24,536 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 403 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:24,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1396 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:51:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-02-15 21:51:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 375. [2023-02-15 21:51:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 307 states have (on average 1.521172638436482) internal successors, (467), 354 states have internal predecessors, (467), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:24,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 497 transitions. [2023-02-15 21:51:24,551 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 497 transitions. Word has length 26 [2023-02-15 21:51:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:24,551 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 497 transitions. [2023-02-15 21:51:24,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 497 transitions. [2023-02-15 21:51:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 21:51:24,552 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:24,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:24,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-15 21:51:24,552 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:24,553 INFO L85 PathProgramCache]: Analyzing trace with hash -984725155, now seen corresponding path program 1 times [2023-02-15 21:51:24,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:24,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822242513] [2023-02-15 21:51:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:24,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:24,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:24,717 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 21:51:24,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:24,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822242513] [2023-02-15 21:51:24,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822242513] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:24,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:24,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:51:24,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500487769] [2023-02-15 21:51:24,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:51:24,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:51:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:51:24,719 INFO L87 Difference]: Start difference. First operand 375 states and 497 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:24,963 INFO L93 Difference]: Finished difference Result 487 states and 597 transitions. [2023-02-15 21:51:24,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:51:24,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-15 21:51:24,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:24,965 INFO L225 Difference]: With dead ends: 487 [2023-02-15 21:51:24,966 INFO L226 Difference]: Without dead ends: 487 [2023-02-15 21:51:24,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:51:24,966 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 676 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:24,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 335 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:24,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-02-15 21:51:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 386. [2023-02-15 21:51:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 323 states have (on average 1.501547987616099) internal successors, (485), 364 states have internal predecessors, (485), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2023-02-15 21:51:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 518 transitions. [2023-02-15 21:51:24,975 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 518 transitions. Word has length 26 [2023-02-15 21:51:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:24,976 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 518 transitions. [2023-02-15 21:51:24,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 518 transitions. [2023-02-15 21:51:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 21:51:24,977 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:24,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:24,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-15 21:51:24,977 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:24,977 INFO L85 PathProgramCache]: Analyzing trace with hash -71084525, now seen corresponding path program 1 times [2023-02-15 21:51:24,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:24,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231858644] [2023-02-15 21:51:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:24,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:25,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:51:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:25,121 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 21:51:25,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:25,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231858644] [2023-02-15 21:51:25,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231858644] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:25,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:25,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:51:25,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016036118] [2023-02-15 21:51:25,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:25,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:51:25,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:25,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:51:25,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:51:25,124 INFO L87 Difference]: Start difference. First operand 386 states and 518 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:25,257 INFO L93 Difference]: Finished difference Result 436 states and 562 transitions. [2023-02-15 21:51:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:51:25,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-15 21:51:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:25,259 INFO L225 Difference]: With dead ends: 436 [2023-02-15 21:51:25,259 INFO L226 Difference]: Without dead ends: 436 [2023-02-15 21:51:25,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:25,260 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 137 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:25,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 486 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:25,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-02-15 21:51:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 386. [2023-02-15 21:51:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 323 states have (on average 1.498452012383901) internal successors, (484), 364 states have internal predecessors, (484), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2023-02-15 21:51:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 517 transitions. [2023-02-15 21:51:25,271 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 517 transitions. Word has length 27 [2023-02-15 21:51:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:25,272 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 517 transitions. [2023-02-15 21:51:25,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 517 transitions. [2023-02-15 21:51:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 21:51:25,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:25,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:25,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-15 21:51:25,274 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:25,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash -461708714, now seen corresponding path program 1 times [2023-02-15 21:51:25,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:25,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205494137] [2023-02-15 21:51:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:25,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:25,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:25,388 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 21:51:25,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:25,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205494137] [2023-02-15 21:51:25,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205494137] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:25,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:25,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:51:25,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870351321] [2023-02-15 21:51:25,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:25,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:51:25,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:25,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:51:25,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:25,390 INFO L87 Difference]: Start difference. First operand 386 states and 517 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:25,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:25,549 INFO L93 Difference]: Finished difference Result 421 states and 528 transitions. [2023-02-15 21:51:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:51:25,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-15 21:51:25,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:25,551 INFO L225 Difference]: With dead ends: 421 [2023-02-15 21:51:25,551 INFO L226 Difference]: Without dead ends: 421 [2023-02-15 21:51:25,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:51:25,551 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 366 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:25,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 637 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-02-15 21:51:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 384. [2023-02-15 21:51:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 323 states have (on average 1.4860681114551084) internal successors, (480), 362 states have internal predecessors, (480), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2023-02-15 21:51:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 513 transitions. [2023-02-15 21:51:25,559 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 513 transitions. Word has length 27 [2023-02-15 21:51:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:25,559 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 513 transitions. [2023-02-15 21:51:25,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 513 transitions. [2023-02-15 21:51:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 21:51:25,560 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:25,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:25,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-15 21:51:25,561 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:25,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2092055213, now seen corresponding path program 1 times [2023-02-15 21:51:25,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:25,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105658463] [2023-02-15 21:51:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:25,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:25,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:51:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:25,914 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 21:51:25,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:25,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105658463] [2023-02-15 21:51:25,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105658463] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:25,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:25,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 21:51:25,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367535504] [2023-02-15 21:51:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:25,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 21:51:25,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 21:51:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:51:25,916 INFO L87 Difference]: Start difference. First operand 384 states and 513 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:26,362 INFO L93 Difference]: Finished difference Result 352 states and 437 transitions. [2023-02-15 21:51:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:51:26,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-15 21:51:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:26,364 INFO L225 Difference]: With dead ends: 352 [2023-02-15 21:51:26,364 INFO L226 Difference]: Without dead ends: 352 [2023-02-15 21:51:26,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-02-15 21:51:26,365 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 211 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:26,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1165 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-02-15 21:51:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 261. [2023-02-15 21:51:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 208 states have (on average 1.4663461538461537) internal successors, (305), 247 states have internal predecessors, (305), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (14), 10 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-15 21:51:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 326 transitions. [2023-02-15 21:51:26,369 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 326 transitions. Word has length 28 [2023-02-15 21:51:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:26,370 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 326 transitions. [2023-02-15 21:51:26,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 326 transitions. [2023-02-15 21:51:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 21:51:26,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:26,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:26,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-15 21:51:26,371 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1320441736, now seen corresponding path program 1 times [2023-02-15 21:51:26,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:26,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103005148] [2023-02-15 21:51:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:26,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:26,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:26,592 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 21:51:26,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:26,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103005148] [2023-02-15 21:51:26,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103005148] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:26,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:26,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:51:26,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293106361] [2023-02-15 21:51:26,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:26,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:51:26,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:26,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:51:26,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:26,594 INFO L87 Difference]: Start difference. First operand 261 states and 326 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:26,819 INFO L93 Difference]: Finished difference Result 323 states and 385 transitions. [2023-02-15 21:51:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 21:51:26,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-02-15 21:51:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:26,820 INFO L225 Difference]: With dead ends: 323 [2023-02-15 21:51:26,820 INFO L226 Difference]: Without dead ends: 323 [2023-02-15 21:51:26,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:51:26,821 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 773 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:26,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 168 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-02-15 21:51:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 264. [2023-02-15 21:51:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 212 states have (on average 1.4481132075471699) internal successors, (307), 248 states have internal predecessors, (307), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-15 21:51:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 331 transitions. [2023-02-15 21:51:26,826 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 331 transitions. Word has length 29 [2023-02-15 21:51:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:26,826 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 331 transitions. [2023-02-15 21:51:26,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 331 transitions. [2023-02-15 21:51:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 21:51:26,827 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:26,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:26,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-15 21:51:26,827 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1684807341, now seen corresponding path program 1 times [2023-02-15 21:51:26,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:26,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194509537] [2023-02-15 21:51:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:26,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:27,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:27,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 21:51:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:51:27,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:27,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194509537] [2023-02-15 21:51:27,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194509537] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:51:27,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293236450] [2023-02-15 21:51:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:27,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:51:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:51:27,239 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 21:51:27,261 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 21:51:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:27,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 21:51:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:51:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:27,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:51:27,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:51:27,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2023-02-15 21:51:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:51:28,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293236450] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:51:28,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:51:28,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 26 [2023-02-15 21:51:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380430156] [2023-02-15 21:51:28,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:51:28,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 21:51:28,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 21:51:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:51:28,068 INFO L87 Difference]: Start difference. First operand 264 states and 331 transitions. Second operand has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:51:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:28,841 INFO L93 Difference]: Finished difference Result 457 states and 573 transitions. [2023-02-15 21:51:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:51:28,842 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2023-02-15 21:51:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:28,843 INFO L225 Difference]: With dead ends: 457 [2023-02-15 21:51:28,843 INFO L226 Difference]: Without dead ends: 457 [2023-02-15 21:51:28,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 21:51:28,845 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1851 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1854 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:28,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1854 Valid, 1101 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:51:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-02-15 21:51:28,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 263. [2023-02-15 21:51:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 212 states have (on average 1.419811320754717) internal successors, (301), 247 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-15 21:51:28,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 325 transitions. [2023-02-15 21:51:28,852 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 325 transitions. Word has length 40 [2023-02-15 21:51:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:28,852 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 325 transitions. [2023-02-15 21:51:28,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:51:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 325 transitions. [2023-02-15 21:51:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 21:51:28,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:28,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:28,862 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 21:51:29,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-15 21:51:29,058 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:29,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:29,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1517564365, now seen corresponding path program 1 times [2023-02-15 21:51:29,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:29,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819748549] [2023-02-15 21:51:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:29,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:29,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:29,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819748549] [2023-02-15 21:51:29,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819748549] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:29,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:29,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 21:51:29,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672305029] [2023-02-15 21:51:29,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:29,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 21:51:29,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:29,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 21:51:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:51:29,464 INFO L87 Difference]: Start difference. First operand 263 states and 325 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:29,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:29,974 INFO L93 Difference]: Finished difference Result 493 states and 607 transitions. [2023-02-15 21:51:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 21:51:29,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-02-15 21:51:29,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:29,976 INFO L225 Difference]: With dead ends: 493 [2023-02-15 21:51:29,976 INFO L226 Difference]: Without dead ends: 493 [2023-02-15 21:51:29,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:51:29,977 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 947 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:29,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 604 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-15 21:51:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 411. [2023-02-15 21:51:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 350 states have (on average 1.4628571428571429) internal successors, (512), 390 states have internal predecessors, (512), 14 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (28), 15 states have call predecessors, (28), 14 states have call successors, (28) [2023-02-15 21:51:29,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 554 transitions. [2023-02-15 21:51:29,986 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 554 transitions. Word has length 40 [2023-02-15 21:51:29,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:29,986 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 554 transitions. [2023-02-15 21:51:29,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 554 transitions. [2023-02-15 21:51:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 21:51:29,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:29,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:29,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-15 21:51:29,989 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1517564303, now seen corresponding path program 1 times [2023-02-15 21:51:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:29,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109046348] [2023-02-15 21:51:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:30,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:30,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:30,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109046348] [2023-02-15 21:51:30,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109046348] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:30,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:30,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:51:30,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745276697] [2023-02-15 21:51:30,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:30,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:51:30,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:51:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:30,161 INFO L87 Difference]: Start difference. First operand 411 states and 554 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:30,289 INFO L93 Difference]: Finished difference Result 429 states and 572 transitions. [2023-02-15 21:51:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:51:30,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-02-15 21:51:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:30,291 INFO L225 Difference]: With dead ends: 429 [2023-02-15 21:51:30,291 INFO L226 Difference]: Without dead ends: 429 [2023-02-15 21:51:30,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:51:30,292 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 340 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:30,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 280 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2023-02-15 21:51:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 411. [2023-02-15 21:51:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 350 states have (on average 1.4628571428571429) internal successors, (512), 390 states have internal predecessors, (512), 14 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (28), 15 states have call predecessors, (28), 14 states have call successors, (28) [2023-02-15 21:51:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 554 transitions. [2023-02-15 21:51:30,300 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 554 transitions. Word has length 40 [2023-02-15 21:51:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:30,300 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 554 transitions. [2023-02-15 21:51:30,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 554 transitions. [2023-02-15 21:51:30,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 21:51:30,301 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:30,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:30,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-15 21:51:30,301 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:30,302 INFO L85 PathProgramCache]: Analyzing trace with hash 767299090, now seen corresponding path program 1 times [2023-02-15 21:51:30,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:30,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115140451] [2023-02-15 21:51:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:30,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:30,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:30,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:30,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115140451] [2023-02-15 21:51:30,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115140451] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:30,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:30,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 21:51:30,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707447710] [2023-02-15 21:51:30,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:30,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:51:30,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:30,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:51:30,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:30,433 INFO L87 Difference]: Start difference. First operand 411 states and 554 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:30,543 INFO L93 Difference]: Finished difference Result 464 states and 575 transitions. [2023-02-15 21:51:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:51:30,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-02-15 21:51:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:30,545 INFO L225 Difference]: With dead ends: 464 [2023-02-15 21:51:30,545 INFO L226 Difference]: Without dead ends: 464 [2023-02-15 21:51:30,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:51:30,546 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 265 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:30,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 905 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-02-15 21:51:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 411. [2023-02-15 21:51:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 350 states have (on average 1.4542857142857142) internal successors, (509), 390 states have internal predecessors, (509), 14 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (28), 15 states have call predecessors, (28), 14 states have call successors, (28) [2023-02-15 21:51:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 551 transitions. [2023-02-15 21:51:30,554 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 551 transitions. Word has length 40 [2023-02-15 21:51:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:30,555 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 551 transitions. [2023-02-15 21:51:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 551 transitions. [2023-02-15 21:51:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 21:51:30,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:30,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:30,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-15 21:51:30,556 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1078522670, now seen corresponding path program 1 times [2023-02-15 21:51:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:30,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661801060] [2023-02-15 21:51:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:30,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:30,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:30,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 21:51:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:51:30,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:30,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661801060] [2023-02-15 21:51:30,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661801060] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:30,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:30,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:51:30,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379363074] [2023-02-15 21:51:30,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:30,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:51:30,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:30,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:51:30,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:51:30,741 INFO L87 Difference]: Start difference. First operand 411 states and 551 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:51:30,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:30,911 INFO L93 Difference]: Finished difference Result 494 states and 660 transitions. [2023-02-15 21:51:30,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 21:51:30,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2023-02-15 21:51:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:30,913 INFO L225 Difference]: With dead ends: 494 [2023-02-15 21:51:30,913 INFO L226 Difference]: Without dead ends: 494 [2023-02-15 21:51:30,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:51:30,914 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 309 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:30,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 236 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-02-15 21:51:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 409. [2023-02-15 21:51:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 350 states have (on average 1.42) internal successors, (497), 388 states have internal predecessors, (497), 14 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (28), 15 states have call predecessors, (28), 14 states have call successors, (28) [2023-02-15 21:51:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 539 transitions. [2023-02-15 21:51:30,928 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 539 transitions. Word has length 42 [2023-02-15 21:51:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:30,928 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 539 transitions. [2023-02-15 21:51:30,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:51:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 539 transitions. [2023-02-15 21:51:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 21:51:30,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:30,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:30,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-15 21:51:30,930 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:30,930 INFO L85 PathProgramCache]: Analyzing trace with hash -905379253, now seen corresponding path program 1 times [2023-02-15 21:51:30,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:30,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732767065] [2023-02-15 21:51:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:30,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:31,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:31,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732767065] [2023-02-15 21:51:31,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732767065] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:31,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:31,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:51:31,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50405924] [2023-02-15 21:51:31,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:31,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:51:31,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:51:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:51:31,102 INFO L87 Difference]: Start difference. First operand 409 states and 539 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:31,218 INFO L93 Difference]: Finished difference Result 426 states and 555 transitions. [2023-02-15 21:51:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:51:31,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-02-15 21:51:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:31,220 INFO L225 Difference]: With dead ends: 426 [2023-02-15 21:51:31,220 INFO L226 Difference]: Without dead ends: 426 [2023-02-15 21:51:31,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:51:31,220 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 465 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:31,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 246 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:51:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-02-15 21:51:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 260. [2023-02-15 21:51:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 212 states have (on average 1.3679245283018868) internal successors, (290), 244 states have internal predecessors, (290), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-15 21:51:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 314 transitions. [2023-02-15 21:51:31,227 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 314 transitions. Word has length 41 [2023-02-15 21:51:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:31,227 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 314 transitions. [2023-02-15 21:51:31,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 314 transitions. [2023-02-15 21:51:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 21:51:31,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:31,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:31,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-02-15 21:51:31,228 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:31,229 INFO L85 PathProgramCache]: Analyzing trace with hash -934084823, now seen corresponding path program 1 times [2023-02-15 21:51:31,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:31,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141306461] [2023-02-15 21:51:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:31,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:32,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:32,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:32,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141306461] [2023-02-15 21:51:32,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141306461] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:32,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:32,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 21:51:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810749137] [2023-02-15 21:51:32,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:32,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 21:51:32,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 21:51:32,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:51:32,499 INFO L87 Difference]: Start difference. First operand 260 states and 314 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:33,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:33,478 INFO L93 Difference]: Finished difference Result 269 states and 324 transitions. [2023-02-15 21:51:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 21:51:33,478 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-02-15 21:51:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:33,479 INFO L225 Difference]: With dead ends: 269 [2023-02-15 21:51:33,479 INFO L226 Difference]: Without dead ends: 269 [2023-02-15 21:51:33,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:51:33,480 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 69 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:33,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1039 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:51:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-02-15 21:51:33,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2023-02-15 21:51:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 219 states have (on average 1.360730593607306) internal successors, (298), 251 states have internal predecessors, (298), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-15 21:51:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 322 transitions. [2023-02-15 21:51:33,484 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 322 transitions. Word has length 43 [2023-02-15 21:51:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:33,485 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 322 transitions. [2023-02-15 21:51:33,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 322 transitions. [2023-02-15 21:51:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 21:51:33,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:33,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:33,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-02-15 21:51:33,486 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1138243033, now seen corresponding path program 1 times [2023-02-15 21:51:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:33,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078751389] [2023-02-15 21:51:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:33,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:33,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:33,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078751389] [2023-02-15 21:51:33,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078751389] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:51:33,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:51:33,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-15 21:51:33,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874608276] [2023-02-15 21:51:33,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:51:33,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 21:51:33,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 21:51:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:51:33,851 INFO L87 Difference]: Start difference. First operand 267 states and 322 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:34,191 INFO L93 Difference]: Finished difference Result 535 states and 649 transitions. [2023-02-15 21:51:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:51:34,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-02-15 21:51:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:34,194 INFO L225 Difference]: With dead ends: 535 [2023-02-15 21:51:34,194 INFO L226 Difference]: Without dead ends: 535 [2023-02-15 21:51:34,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:51:34,194 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1234 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:34,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 756 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:51:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-02-15 21:51:34,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 302. [2023-02-15 21:51:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 254 states have (on average 1.3346456692913387) internal successors, (339), 286 states have internal predecessors, (339), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-15 21:51:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 363 transitions. [2023-02-15 21:51:34,201 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 363 transitions. Word has length 44 [2023-02-15 21:51:34,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:34,201 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 363 transitions. [2023-02-15 21:51:34,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:51:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 363 transitions. [2023-02-15 21:51:34,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 21:51:34,202 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:34,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:34,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-02-15 21:51:34,202 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1516678113, now seen corresponding path program 1 times [2023-02-15 21:51:34,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:34,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488462675] [2023-02-15 21:51:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:34,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:35,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:35,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488462675] [2023-02-15 21:51:35,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488462675] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:51:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791793128] [2023-02-15 21:51:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:35,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:51:35,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:51:35,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:51:35,674 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 21:51:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:35,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 21:51:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:51:35,977 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 21:51:35,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 21:51:36,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:36,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:36,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:36,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:36,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:36,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:36,452 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 21:51:36,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2023-02-15 21:51:36,466 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 21:51:36,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2023-02-15 21:51:36,615 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:51:36,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2023-02-15 21:51:36,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:51:36,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2023-02-15 21:51:36,981 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:51:36,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2023-02-15 21:51:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:37,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:51:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791793128] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:51:41,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:51:41,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 33 [2023-02-15 21:51:41,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020573794] [2023-02-15 21:51:41,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:51:41,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 21:51:41,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:51:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 21:51:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1861, Unknown=6, NotChecked=0, Total=2070 [2023-02-15 21:51:41,739 INFO L87 Difference]: Start difference. First operand 302 states and 363 transitions. Second operand has 34 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:51:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:51:44,359 INFO L93 Difference]: Finished difference Result 491 states and 573 transitions. [2023-02-15 21:51:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 21:51:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2023-02-15 21:51:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:51:44,362 INFO L225 Difference]: With dead ends: 491 [2023-02-15 21:51:44,362 INFO L226 Difference]: Without dead ends: 491 [2023-02-15 21:51:44,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=756, Invalid=4494, Unknown=6, NotChecked=0, Total=5256 [2023-02-15 21:51:44,364 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 640 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:51:44,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 1885 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 21:51:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2023-02-15 21:51:44,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 333. [2023-02-15 21:51:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 282 states have (on average 1.3297872340425532) internal successors, (375), 315 states have internal predecessors, (375), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-15 21:51:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 405 transitions. [2023-02-15 21:51:44,370 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 405 transitions. Word has length 44 [2023-02-15 21:51:44,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:51:44,370 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 405 transitions. [2023-02-15 21:51:44,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:51:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 405 transitions. [2023-02-15 21:51:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 21:51:44,371 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:51:44,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:51:44,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 21:51:44,576 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,SelfDestructingSolverStorable40 [2023-02-15 21:51:44,577 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:51:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:51:44,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1516678114, now seen corresponding path program 1 times [2023-02-15 21:51:44,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:51:44,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11858049] [2023-02-15 21:51:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:44,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:51:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:46,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:51:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:51:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11858049] [2023-02-15 21:51:46,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11858049] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:51:46,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011676922] [2023-02-15 21:51:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:51:46,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:51:46,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:51:46,425 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 21:51:46,462 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 21:51:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:51:46,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-15 21:51:46,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:51:46,744 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 21:51:46,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 21:51:46,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:51:46,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:46,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:46,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:46,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:46,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:46,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:51:47,238 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 21:51:47,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2023-02-15 21:51:47,250 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-15 21:51:47,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-02-15 21:51:47,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:51:47,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-15 21:51:47,624 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:51:47,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:51:47,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-02-15 21:51:47,804 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:51:47,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-02-15 21:51:47,809 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:51:47,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2023-02-15 21:51:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:51:47,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:52:01,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:52:01,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 553 treesize of output 558 [2023-02-15 21:52:26,603 WARN L233 SmtUtils]: Spent 8.87s on a formula simplification. DAG size of input: 161 DAG size of output: 139 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:52:27,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011676922] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:52:27,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:52:27,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 33 [2023-02-15 21:52:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464866353] [2023-02-15 21:52:27,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:52:27,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 21:52:27,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:52:27,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 21:52:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2056, Unknown=6, NotChecked=0, Total=2256 [2023-02-15 21:52:27,066 INFO L87 Difference]: Start difference. First operand 333 states and 405 transitions. Second operand has 34 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 34 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:52:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:52:31,223 INFO L93 Difference]: Finished difference Result 821 states and 974 transitions. [2023-02-15 21:52:31,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 21:52:31,223 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 34 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2023-02-15 21:52:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:52:31,226 INFO L225 Difference]: With dead ends: 821 [2023-02-15 21:52:31,226 INFO L226 Difference]: Without dead ends: 821 [2023-02-15 21:52:31,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=691, Invalid=4273, Unknown=6, NotChecked=0, Total=4970 [2023-02-15 21:52:31,228 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1581 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 2964 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:52:31,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1583 Valid, 2964 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 21:52:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-02-15 21:52:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 468. [2023-02-15 21:52:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 405 states have (on average 1.3975308641975308) internal successors, (566), 444 states have internal predecessors, (566), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 16 states have call predecessors, (32), 16 states have call successors, (32) [2023-02-15 21:52:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 614 transitions. [2023-02-15 21:52:31,237 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 614 transitions. Word has length 44 [2023-02-15 21:52:31,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:52:31,237 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 614 transitions. [2023-02-15 21:52:31,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 34 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:52:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 614 transitions. [2023-02-15 21:52:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 21:52:31,238 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:52:31,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:52:31,248 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 21:52:31,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:52:31,449 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:52:31,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:52:31,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1518525155, now seen corresponding path program 1 times [2023-02-15 21:52:31,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:52:31,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118290519] [2023-02-15 21:52:31,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:31,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:52:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:32,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:52:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:32,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:52:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118290519] [2023-02-15 21:52:32,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118290519] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:52:32,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114033827] [2023-02-15 21:52:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:32,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:52:32,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:52:32,777 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 21:52:32,804 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 21:52:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 21:52:32,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:52:33,008 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 21:52:33,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:52:33,489 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:52:33,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-02-15 21:52:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:33,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:52:33,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114033827] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:52:33,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 21:52:33,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [20] total 30 [2023-02-15 21:52:33,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203886011] [2023-02-15 21:52:33,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:52:33,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 21:52:33,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:52:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 21:52:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2023-02-15 21:52:33,524 INFO L87 Difference]: Start difference. First operand 468 states and 614 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:52:34,373 INFO L93 Difference]: Finished difference Result 739 states and 938 transitions. [2023-02-15 21:52:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:52:34,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-02-15 21:52:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:52:34,376 INFO L225 Difference]: With dead ends: 739 [2023-02-15 21:52:34,376 INFO L226 Difference]: Without dead ends: 739 [2023-02-15 21:52:34,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=302, Invalid=1590, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 21:52:34,377 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 943 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:52:34,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 784 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:52:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2023-02-15 21:52:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 551. [2023-02-15 21:52:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 476 states have (on average 1.388655462184874) internal successors, (661), 521 states have internal predecessors, (661), 22 states have call successors, (22), 10 states have call predecessors, (22), 20 states have return successors, (44), 19 states have call predecessors, (44), 22 states have call successors, (44) [2023-02-15 21:52:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 727 transitions. [2023-02-15 21:52:34,388 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 727 transitions. Word has length 44 [2023-02-15 21:52:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:52:34,388 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 727 transitions. [2023-02-15 21:52:34,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 727 transitions. [2023-02-15 21:52:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 21:52:34,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:52:34,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:52:34,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 21:52:34,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:52:34,597 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:52:34,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:52:34,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1518525156, now seen corresponding path program 1 times [2023-02-15 21:52:34,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:52:34,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622428721] [2023-02-15 21:52:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:34,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:52:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:35,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:52:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:35,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:52:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622428721] [2023-02-15 21:52:35,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622428721] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:52:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610230316] [2023-02-15 21:52:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:35,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:52:35,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:52:35,989 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 21:52:36,020 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 21:52:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:36,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 21:52:36,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:52:36,234 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 21:52:36,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:52:36,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:52:36,849 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:52:36,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-02-15 21:52:36,855 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:52:36,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-02-15 21:52:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:36,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:52:36,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610230316] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:52:36,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 21:52:36,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [20] total 31 [2023-02-15 21:52:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350937336] [2023-02-15 21:52:36,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:52:36,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 21:52:36,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:52:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 21:52:36,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2023-02-15 21:52:36,924 INFO L87 Difference]: Start difference. First operand 551 states and 727 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:52:37,635 INFO L93 Difference]: Finished difference Result 765 states and 995 transitions. [2023-02-15 21:52:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:52:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-02-15 21:52:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:52:37,638 INFO L225 Difference]: With dead ends: 765 [2023-02-15 21:52:37,638 INFO L226 Difference]: Without dead ends: 765 [2023-02-15 21:52:37,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 21:52:37,639 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 886 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:52:37,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 596 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:52:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-02-15 21:52:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 644. [2023-02-15 21:52:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 561 states have (on average 1.4313725490196079) internal successors, (803), 610 states have internal predecessors, (803), 26 states have call successors, (26), 12 states have call predecessors, (26), 24 states have return successors, (52), 21 states have call predecessors, (52), 26 states have call successors, (52) [2023-02-15 21:52:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 881 transitions. [2023-02-15 21:52:37,654 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 881 transitions. Word has length 44 [2023-02-15 21:52:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:52:37,654 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 881 transitions. [2023-02-15 21:52:37,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 881 transitions. [2023-02-15 21:52:37,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 21:52:37,655 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:52:37,655 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:52:37,661 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 21:52:37,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-02-15 21:52:37,861 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:52:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:52:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash -170361760, now seen corresponding path program 1 times [2023-02-15 21:52:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:52:37,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228133097] [2023-02-15 21:52:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:37,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:52:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:38,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:52:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:38,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:52:38,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228133097] [2023-02-15 21:52:38,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228133097] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:52:38,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:52:38,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-15 21:52:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446932017] [2023-02-15 21:52:38,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:52:38,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 21:52:38,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:52:38,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 21:52:38,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:52:38,186 INFO L87 Difference]: Start difference. First operand 644 states and 881 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:52:38,546 INFO L93 Difference]: Finished difference Result 762 states and 991 transitions. [2023-02-15 21:52:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:52:38,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 21:52:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:52:38,549 INFO L225 Difference]: With dead ends: 762 [2023-02-15 21:52:38,549 INFO L226 Difference]: Without dead ends: 762 [2023-02-15 21:52:38,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:52:38,550 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 868 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:52:38,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 740 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:52:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2023-02-15 21:52:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 641. [2023-02-15 21:52:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 558 states have (on average 1.4318996415770608) internal successors, (799), 607 states have internal predecessors, (799), 26 states have call successors, (26), 12 states have call predecessors, (26), 24 states have return successors, (52), 21 states have call predecessors, (52), 26 states have call successors, (52) [2023-02-15 21:52:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 877 transitions. [2023-02-15 21:52:38,560 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 877 transitions. Word has length 45 [2023-02-15 21:52:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:52:38,561 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 877 transitions. [2023-02-15 21:52:38,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 877 transitions. [2023-02-15 21:52:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 21:52:38,562 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:52:38,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:52:38,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-02-15 21:52:38,562 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:52:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:52:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1074946575, now seen corresponding path program 1 times [2023-02-15 21:52:38,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:52:38,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844509246] [2023-02-15 21:52:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:38,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:52:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:38,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:52:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:38,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:52:38,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844509246] [2023-02-15 21:52:38,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844509246] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:52:38,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:52:38,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-15 21:52:38,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750837195] [2023-02-15 21:52:38,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:52:38,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:52:38,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:52:38,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:52:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:52:38,977 INFO L87 Difference]: Start difference. First operand 641 states and 877 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:52:39,939 INFO L93 Difference]: Finished difference Result 965 states and 1287 transitions. [2023-02-15 21:52:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:52:39,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 21:52:39,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:52:39,941 INFO L225 Difference]: With dead ends: 965 [2023-02-15 21:52:39,942 INFO L226 Difference]: Without dead ends: 965 [2023-02-15 21:52:39,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:52:39,942 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 911 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:52:39,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 886 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:52:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2023-02-15 21:52:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 757. [2023-02-15 21:52:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 658 states have (on average 1.419452887537994) internal successors, (934), 715 states have internal predecessors, (934), 34 states have call successors, (34), 16 states have call predecessors, (34), 32 states have return successors, (68), 25 states have call predecessors, (68), 34 states have call successors, (68) [2023-02-15 21:52:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1036 transitions. [2023-02-15 21:52:39,957 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1036 transitions. Word has length 45 [2023-02-15 21:52:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:52:39,958 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1036 transitions. [2023-02-15 21:52:39,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1036 transitions. [2023-02-15 21:52:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 21:52:39,959 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:52:39,959 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:52:39,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-02-15 21:52:39,959 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:52:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:52:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1073099533, now seen corresponding path program 1 times [2023-02-15 21:52:39,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:52:39,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185773338] [2023-02-15 21:52:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:39,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:52:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:40,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:52:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:40,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:52:40,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185773338] [2023-02-15 21:52:40,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185773338] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:52:40,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509837698] [2023-02-15 21:52:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:40,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:52:40,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:52:40,645 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 21:52:40,652 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 21:52:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:40,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 21:52:40,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:52:40,932 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 21:52:41,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:52:41,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:52:41,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-02-15 21:52:41,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-15 21:52:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:41,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:52:41,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509837698] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:52:41,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 21:52:41,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2023-02-15 21:52:41,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782655188] [2023-02-15 21:52:41,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:52:41,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 21:52:41,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:52:41,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 21:52:41,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-02-15 21:52:41,365 INFO L87 Difference]: Start difference. First operand 757 states and 1036 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:52:42,393 INFO L93 Difference]: Finished difference Result 1221 states and 1653 transitions. [2023-02-15 21:52:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 21:52:42,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 21:52:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:52:42,398 INFO L225 Difference]: With dead ends: 1221 [2023-02-15 21:52:42,398 INFO L226 Difference]: Without dead ends: 1221 [2023-02-15 21:52:42,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=404, Invalid=1576, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 21:52:42,399 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 801 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:52:42,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 1650 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:52:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2023-02-15 21:52:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 813. [2023-02-15 21:52:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 706 states have (on average 1.415014164305949) internal successors, (999), 767 states have internal predecessors, (999), 38 states have call successors, (38), 18 states have call predecessors, (38), 36 states have return successors, (76), 27 states have call predecessors, (76), 38 states have call successors, (76) [2023-02-15 21:52:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1113 transitions. [2023-02-15 21:52:42,422 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1113 transitions. Word has length 45 [2023-02-15 21:52:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:52:42,422 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1113 transitions. [2023-02-15 21:52:42,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1113 transitions. [2023-02-15 21:52:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 21:52:42,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:52:42,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:52:42,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 21:52:42,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:52:42,630 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:52:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:52:42,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1073099532, now seen corresponding path program 1 times [2023-02-15 21:52:42,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:52:42,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714781062] [2023-02-15 21:52:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:42,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:52:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:43,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:52:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:43,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:52:43,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714781062] [2023-02-15 21:52:43,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714781062] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:52:43,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493020943] [2023-02-15 21:52:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:43,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:52:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:52:43,664 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 21:52:43,665 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 21:52:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:43,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-15 21:52:43,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:52:43,896 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 21:52:44,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:52:44,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:52:44,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:52:44,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-02-15 21:52:44,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:52:44,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 21:52:44,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:52:44,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2023-02-15 21:52:44,519 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:52:44,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2023-02-15 21:52:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:44,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:52:44,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493020943] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:52:44,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 21:52:44,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [18] total 32 [2023-02-15 21:52:44,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959835629] [2023-02-15 21:52:44,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:52:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 21:52:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:52:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 21:52:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 21:52:44,591 INFO L87 Difference]: Start difference. First operand 813 states and 1113 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:52:45,892 INFO L93 Difference]: Finished difference Result 1268 states and 1692 transitions. [2023-02-15 21:52:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:52:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-15 21:52:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:52:45,896 INFO L225 Difference]: With dead ends: 1268 [2023-02-15 21:52:45,896 INFO L226 Difference]: Without dead ends: 1268 [2023-02-15 21:52:45,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 21:52:45,898 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 1290 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:52:45,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 1422 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:52:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2023-02-15 21:52:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 860. [2023-02-15 21:52:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 749 states have (on average 1.4299065420560748) internal successors, (1071), 812 states have internal predecessors, (1071), 40 states have call successors, (40), 19 states have call predecessors, (40), 38 states have return successors, (80), 28 states have call predecessors, (80), 40 states have call successors, (80) [2023-02-15 21:52:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1191 transitions. [2023-02-15 21:52:45,916 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1191 transitions. Word has length 45 [2023-02-15 21:52:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:52:45,916 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 1191 transitions. [2023-02-15 21:52:45,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1191 transitions. [2023-02-15 21:52:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 21:52:45,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:52:45,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:52:45,925 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 21:52:46,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:52:46,123 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:52:46,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:52:46,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1036393234, now seen corresponding path program 1 times [2023-02-15 21:52:46,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:52:46,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960114449] [2023-02-15 21:52:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:46,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:52:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:46,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:52:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:46,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:52:46,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960114449] [2023-02-15 21:52:46,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960114449] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:52:46,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:52:46,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-15 21:52:46,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114412881] [2023-02-15 21:52:46,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:52:46,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:52:46,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:52:46,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:52:46,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:52:46,535 INFO L87 Difference]: Start difference. First operand 860 states and 1191 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:52:47,237 INFO L93 Difference]: Finished difference Result 1089 states and 1477 transitions. [2023-02-15 21:52:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:52:47,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-02-15 21:52:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:52:47,241 INFO L225 Difference]: With dead ends: 1089 [2023-02-15 21:52:47,241 INFO L226 Difference]: Without dead ends: 1089 [2023-02-15 21:52:47,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:52:47,244 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 594 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:52:47,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1111 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:52:47,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2023-02-15 21:52:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 882. [2023-02-15 21:52:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 771 states have (on average 1.4461738002594033) internal successors, (1115), 834 states have internal predecessors, (1115), 40 states have call successors, (40), 19 states have call predecessors, (40), 38 states have return successors, (80), 28 states have call predecessors, (80), 40 states have call successors, (80) [2023-02-15 21:52:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1235 transitions. [2023-02-15 21:52:47,259 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1235 transitions. Word has length 46 [2023-02-15 21:52:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:52:47,259 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1235 transitions. [2023-02-15 21:52:47,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1235 transitions. [2023-02-15 21:52:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 21:52:47,260 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:52:47,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:52:47,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-02-15 21:52:47,260 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:52:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:52:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1093651536, now seen corresponding path program 1 times [2023-02-15 21:52:47,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:52:47,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262881046] [2023-02-15 21:52:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:47,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:52:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:47,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:52:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:47,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:52:47,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262881046] [2023-02-15 21:52:47,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262881046] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:52:47,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:52:47,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 21:52:47,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770916452] [2023-02-15 21:52:47,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:52:47,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 21:52:47,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:52:47,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 21:52:47,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:52:47,540 INFO L87 Difference]: Start difference. First operand 882 states and 1235 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:52:47,897 INFO L93 Difference]: Finished difference Result 1047 states and 1419 transitions. [2023-02-15 21:52:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:52:47,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-02-15 21:52:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:52:47,901 INFO L225 Difference]: With dead ends: 1047 [2023-02-15 21:52:47,901 INFO L226 Difference]: Without dead ends: 1047 [2023-02-15 21:52:47,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-02-15 21:52:47,901 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 234 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:52:47,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1091 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:52:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-02-15 21:52:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 645. [2023-02-15 21:52:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 562 states have (on average 1.4288256227758007) internal successors, (803), 611 states have internal predecessors, (803), 26 states have call successors, (26), 12 states have call predecessors, (26), 24 states have return successors, (52), 21 states have call predecessors, (52), 26 states have call successors, (52) [2023-02-15 21:52:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 881 transitions. [2023-02-15 21:52:47,911 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 881 transitions. Word has length 46 [2023-02-15 21:52:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:52:47,912 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 881 transitions. [2023-02-15 21:52:47,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:52:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 881 transitions. [2023-02-15 21:52:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 21:52:47,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:52:47,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:52:47,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-02-15 21:52:47,913 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:52:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:52:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash 301908134, now seen corresponding path program 1 times [2023-02-15 21:52:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:52:47,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749359174] [2023-02-15 21:52:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:52:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:49,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:52:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:49,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:52:49,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749359174] [2023-02-15 21:52:49,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749359174] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:52:49,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515477366] [2023-02-15 21:52:49,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:52:49,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:52:49,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:52:49,201 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 21:52:49,209 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 21:52:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:52:49,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 21:52:49,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:52:49,450 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 21:52:49,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 21:52:49,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:52:49,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:52:49,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 21:52:49,781 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 21:52:49,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2023-02-15 21:52:50,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:52:50,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2023-02-15 21:52:50,166 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:52:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:52:50,179 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2023-02-15 21:52:50,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 83 [2023-02-15 21:52:50,506 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:52:50,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 41 [2023-02-15 21:52:50,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 21:52:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:52:50,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:52:51,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:52:51,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 69 [2023-02-15 21:52:54,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515477366] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:52:54,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:52:54,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 32 [2023-02-15 21:52:54,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902192298] [2023-02-15 21:52:54,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:52:54,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 21:52:54,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:52:54,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 21:52:54,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2004, Unknown=5, NotChecked=0, Total=2162 [2023-02-15 21:52:54,713 INFO L87 Difference]: Start difference. First operand 645 states and 881 transitions. Second operand has 33 states, 32 states have (on average 2.8125) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:52:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:52:59,891 INFO L93 Difference]: Finished difference Result 1077 states and 1388 transitions. [2023-02-15 21:52:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 21:52:59,892 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.8125) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2023-02-15 21:52:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:52:59,894 INFO L225 Difference]: With dead ends: 1077 [2023-02-15 21:52:59,894 INFO L226 Difference]: Without dead ends: 1077 [2023-02-15 21:52:59,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1038, Invalid=5599, Unknown=5, NotChecked=0, Total=6642 [2023-02-15 21:52:59,895 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 1814 mSDsluCounter, 3533 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 3681 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:52:59,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1814 Valid, 3681 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 21:52:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2023-02-15 21:52:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 731. [2023-02-15 21:52:59,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 640 states have (on average 1.4359375) internal successors, (919), 693 states have internal predecessors, (919), 30 states have call successors, (30), 14 states have call predecessors, (30), 28 states have return successors, (60), 23 states have call predecessors, (60), 30 states have call successors, (60) [2023-02-15 21:52:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1009 transitions. [2023-02-15 21:52:59,909 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1009 transitions. Word has length 47 [2023-02-15 21:52:59,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:52:59,909 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1009 transitions. [2023-02-15 21:52:59,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.8125) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:52:59,909 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1009 transitions. [2023-02-15 21:52:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 21:52:59,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:52:59,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:52:59,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 21:53:00,115 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,SelfDestructingSolverStorable50 [2023-02-15 21:53:00,115 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:53:00,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:53:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash -507438492, now seen corresponding path program 1 times [2023-02-15 21:53:00,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:53:00,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457177839] [2023-02-15 21:53:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:53:00,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:53:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:00,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:53:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:53:00,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:53:00,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457177839] [2023-02-15 21:53:00,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457177839] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:53:00,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13452472] [2023-02-15 21:53:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:53:00,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:53:00,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:53:00,764 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 21:53:00,778 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 21:53:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:00,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 21:53:00,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:53:01,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:53:01,333 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:53:01,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-02-15 21:53:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:53:01,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:53:01,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13452472] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:53:01,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 21:53:01,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 27 [2023-02-15 21:53:01,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874402895] [2023-02-15 21:53:01,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:53:01,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 21:53:01,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:53:01,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 21:53:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2023-02-15 21:53:01,362 INFO L87 Difference]: Start difference. First operand 731 states and 1009 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:53:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:53:01,999 INFO L93 Difference]: Finished difference Result 1132 states and 1544 transitions. [2023-02-15 21:53:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 21:53:02,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-02-15 21:53:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:53:02,003 INFO L225 Difference]: With dead ends: 1132 [2023-02-15 21:53:02,003 INFO L226 Difference]: Without dead ends: 1132 [2023-02-15 21:53:02,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 21:53:02,004 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 873 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:53:02,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 538 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:53:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2023-02-15 21:53:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1003. [2023-02-15 21:53:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 880 states have (on average 1.4579545454545455) internal successors, (1283), 949 states have internal predecessors, (1283), 46 states have call successors, (46), 22 states have call predecessors, (46), 44 states have return successors, (92), 31 states have call predecessors, (92), 46 states have call successors, (92) [2023-02-15 21:53:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1421 transitions. [2023-02-15 21:53:02,020 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1421 transitions. Word has length 47 [2023-02-15 21:53:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:53:02,020 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1421 transitions. [2023-02-15 21:53:02,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:53:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1421 transitions. [2023-02-15 21:53:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 21:53:02,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:53:02,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:53:02,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 21:53:02,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:53:02,229 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:53:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:53:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2060267401, now seen corresponding path program 1 times [2023-02-15 21:53:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:53:02,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468778413] [2023-02-15 21:53:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:53:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:53:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:02,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:53:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:02,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:53:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:53:02,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:53:02,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468778413] [2023-02-15 21:53:02,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468778413] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:53:02,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:53:02,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:53:02,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875027331] [2023-02-15 21:53:02,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:53:02,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:53:02,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:53:02,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:53:02,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:53:02,361 INFO L87 Difference]: Start difference. First operand 1003 states and 1421 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 21:53:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:53:02,472 INFO L93 Difference]: Finished difference Result 1232 states and 1715 transitions. [2023-02-15 21:53:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:53:02,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-15 21:53:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:53:02,475 INFO L225 Difference]: With dead ends: 1232 [2023-02-15 21:53:02,475 INFO L226 Difference]: Without dead ends: 1232 [2023-02-15 21:53:02,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:53:02,475 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 230 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:53:02,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 357 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:53:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2023-02-15 21:53:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1002. [2023-02-15 21:53:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 880 states have (on average 1.4386363636363637) internal successors, (1266), 948 states have internal predecessors, (1266), 46 states have call successors, (46), 22 states have call predecessors, (46), 44 states have return successors, (92), 31 states have call predecessors, (92), 46 states have call successors, (92) [2023-02-15 21:53:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1404 transitions. [2023-02-15 21:53:02,491 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1404 transitions. Word has length 48 [2023-02-15 21:53:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:53:02,491 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1404 transitions. [2023-02-15 21:53:02,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 21:53:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1404 transitions. [2023-02-15 21:53:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 21:53:02,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:53:02,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:53:02,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-02-15 21:53:02,492 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:53:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:53:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash -556219847, now seen corresponding path program 1 times [2023-02-15 21:53:02,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:53:02,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544828307] [2023-02-15 21:53:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:53:02,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:53:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:03,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:53:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:03,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:53:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:53:03,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:53:03,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544828307] [2023-02-15 21:53:03,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544828307] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:53:03,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428648986] [2023-02-15 21:53:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:53:03,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:53:03,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:53:03,882 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 21:53:03,885 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 21:53:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:03,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-15 21:53:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:53:04,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:53:04,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:53:04,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:53:04,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2023-02-15 21:53:04,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:53:04,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-15 21:53:04,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:53:04,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-02-15 21:53:04,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:53:04,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:53:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:53:04,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:53:04,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 52 [2023-02-15 21:53:04,927 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 21:53:04,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:53:05,460 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:53:05,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:53:05,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 146 [2023-02-15 21:53:05,483 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:53:05,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:53:05,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 213 [2023-02-15 21:53:05,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-02-15 21:53:05,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:53:05,546 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:53:05,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:53:05,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 264 treesize of output 266 [2023-02-15 21:53:05,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:53:05,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 258 treesize of output 256 [2023-02-15 21:53:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:53:06,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428648986] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:53:06,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:53:06,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 20] total 56 [2023-02-15 21:53:06,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126876390] [2023-02-15 21:53:06,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:53:06,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 21:53:06,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:53:06,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 21:53:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2891, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 21:53:06,305 INFO L87 Difference]: Start difference. First operand 1002 states and 1404 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:53:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:53:56,205 INFO L93 Difference]: Finished difference Result 6621 states and 8485 transitions. [2023-02-15 21:53:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2023-02-15 21:53:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2023-02-15 21:53:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:53:56,223 INFO L225 Difference]: With dead ends: 6621 [2023-02-15 21:53:56,224 INFO L226 Difference]: Without dead ends: 6603 [2023-02-15 21:53:56,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 397 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62666 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=19200, Invalid=139602, Unknown=0, NotChecked=0, Total=158802 [2023-02-15 21:53:56,242 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 13254 mSDsluCounter, 8581 mSDsCounter, 0 mSdLazyCounter, 8117 mSolverCounterSat, 2974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13255 SdHoareTripleChecker+Valid, 8751 SdHoareTripleChecker+Invalid, 11091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2974 IncrementalHoareTripleChecker+Valid, 8117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:53:56,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13255 Valid, 8751 Invalid, 11091 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2974 Valid, 8117 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-02-15 21:53:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2023-02-15 21:53:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 1666. [2023-02-15 21:53:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1474 states have (on average 1.4165535956580733) internal successors, (2088), 1568 states have internal predecessors, (2088), 82 states have call successors, (82), 39 states have call predecessors, (82), 78 states have return successors, (164), 58 states have call predecessors, (164), 82 states have call successors, (164) [2023-02-15 21:53:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2334 transitions. [2023-02-15 21:53:56,313 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2334 transitions. Word has length 49 [2023-02-15 21:53:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:53:56,314 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2334 transitions. [2023-02-15 21:53:56,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:53:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2334 transitions. [2023-02-15 21:53:56,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 21:53:56,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:53:56,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:53:56,320 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 21:53:56,520 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,SelfDestructingSolverStorable53 [2023-02-15 21:53:56,521 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:53:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:53:56,522 INFO L85 PathProgramCache]: Analyzing trace with hash -457059178, now seen corresponding path program 1 times [2023-02-15 21:53:56,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:53:56,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683881625] [2023-02-15 21:53:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:53:56,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:53:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:56,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:53:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:53:56,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:53:56,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683881625] [2023-02-15 21:53:56,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683881625] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:53:56,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:53:56,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-15 21:53:56,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404227752] [2023-02-15 21:53:56,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:53:56,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:53:56,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:53:56,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:53:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:53:56,974 INFO L87 Difference]: Start difference. First operand 1666 states and 2334 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:53:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:53:57,845 INFO L93 Difference]: Finished difference Result 1861 states and 2528 transitions. [2023-02-15 21:53:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:53:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-02-15 21:53:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:53:57,855 INFO L225 Difference]: With dead ends: 1861 [2023-02-15 21:53:57,855 INFO L226 Difference]: Without dead ends: 1861 [2023-02-15 21:53:57,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2023-02-15 21:53:57,856 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 703 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:53:57,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 862 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:53:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2023-02-15 21:53:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1603. [2023-02-15 21:53:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1419 states have (on average 1.4150810429880196) internal successors, (2008), 1509 states have internal predecessors, (2008), 78 states have call successors, (78), 37 states have call predecessors, (78), 74 states have return successors, (156), 56 states have call predecessors, (156), 78 states have call successors, (156) [2023-02-15 21:53:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2242 transitions. [2023-02-15 21:53:57,878 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2242 transitions. Word has length 48 [2023-02-15 21:53:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:53:57,879 INFO L495 AbstractCegarLoop]: Abstraction has 1603 states and 2242 transitions. [2023-02-15 21:53:57,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:53:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2242 transitions. [2023-02-15 21:53:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 21:53:57,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:53:57,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:53:57,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-02-15 21:53:57,880 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:53:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:53:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1266405804, now seen corresponding path program 1 times [2023-02-15 21:53:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:53:57,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733914773] [2023-02-15 21:53:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:53:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:53:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:58,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:53:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:53:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:53:58,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:53:58,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733914773] [2023-02-15 21:53:58,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733914773] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:53:58,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:53:58,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 21:53:58,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241365385] [2023-02-15 21:53:58,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:53:58,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 21:53:58,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:53:58,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 21:53:58,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-02-15 21:53:58,599 INFO L87 Difference]: Start difference. First operand 1603 states and 2242 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:53:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:53:59,618 INFO L93 Difference]: Finished difference Result 2031 states and 2749 transitions. [2023-02-15 21:53:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 21:53:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-02-15 21:53:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:53:59,622 INFO L225 Difference]: With dead ends: 2031 [2023-02-15 21:53:59,622 INFO L226 Difference]: Without dead ends: 2031 [2023-02-15 21:53:59,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 21:53:59,622 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 1252 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:53:59,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 1779 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:53:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2023-02-15 21:53:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1302. [2023-02-15 21:53:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1154 states have (on average 1.4046793760831888) internal successors, (1621), 1226 states have internal predecessors, (1621), 60 states have call successors, (60), 28 states have call predecessors, (60), 56 states have return successors, (120), 47 states have call predecessors, (120), 60 states have call successors, (120) [2023-02-15 21:53:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1801 transitions. [2023-02-15 21:53:59,643 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1801 transitions. Word has length 48 [2023-02-15 21:53:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:53:59,643 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 1801 transitions. [2023-02-15 21:53:59,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:53:59,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1801 transitions. [2023-02-15 21:53:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 21:53:59,644 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:53:59,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:53:59,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-02-15 21:53:59,644 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:53:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:53:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash 220633641, now seen corresponding path program 1 times [2023-02-15 21:53:59,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:53:59,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814534066] [2023-02-15 21:53:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:53:59,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:53:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:54:00,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:54:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:54:00,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-15 21:54:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:54:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:54:00,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:54:00,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814534066] [2023-02-15 21:54:00,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814534066] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:54:00,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918785834] [2023-02-15 21:54:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:54:00,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:54:00,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:54:00,616 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 21:54:00,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 21:54:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:54:00,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 21:54:00,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:54:01,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:54:01,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:01,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2023-02-15 21:54:01,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:01,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:01,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:01,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:54:01,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 52 [2023-02-15 21:54:01,419 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 21:54:01,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:54:01,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 106 [2023-02-15 21:54:01,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:01,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-02-15 21:54:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:54:02,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918785834] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:54:02,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:54:02,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 49 [2023-02-15 21:54:02,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582729128] [2023-02-15 21:54:02,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:54:02,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 21:54:02,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:54:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 21:54:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2165, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 21:54:02,282 INFO L87 Difference]: Start difference. First operand 1302 states and 1801 transitions. Second operand has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 46 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:54:09,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:54:09,266 INFO L93 Difference]: Finished difference Result 3577 states and 4696 transitions. [2023-02-15 21:54:09,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-15 21:54:09,267 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 46 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2023-02-15 21:54:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:54:09,273 INFO L225 Difference]: With dead ends: 3577 [2023-02-15 21:54:09,274 INFO L226 Difference]: Without dead ends: 3571 [2023-02-15 21:54:09,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2713 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1914, Invalid=8798, Unknown=0, NotChecked=0, Total=10712 [2023-02-15 21:54:09,275 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 5001 mSDsluCounter, 8210 mSDsCounter, 0 mSdLazyCounter, 5576 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5001 SdHoareTripleChecker+Valid, 8614 SdHoareTripleChecker+Invalid, 5969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 5576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:54:09,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5001 Valid, 8614 Invalid, 5969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 5576 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-02-15 21:54:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2023-02-15 21:54:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 1284. [2023-02-15 21:54:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1136 states have (on average 1.3961267605633803) internal successors, (1586), 1208 states have internal predecessors, (1586), 60 states have call successors, (60), 28 states have call predecessors, (60), 56 states have return successors, (120), 47 states have call predecessors, (120), 60 states have call successors, (120) [2023-02-15 21:54:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 1766 transitions. [2023-02-15 21:54:09,309 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 1766 transitions. Word has length 50 [2023-02-15 21:54:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:54:09,309 INFO L495 AbstractCegarLoop]: Abstraction has 1284 states and 1766 transitions. [2023-02-15 21:54:09,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 46 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:54:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 1766 transitions. [2023-02-15 21:54:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 21:54:09,311 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:54:09,312 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:54:09,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 21:54:09,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-02-15 21:54:09,523 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:54:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:54:09,524 INFO L85 PathProgramCache]: Analyzing trace with hash 483964998, now seen corresponding path program 1 times [2023-02-15 21:54:09,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:54:09,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694155776] [2023-02-15 21:54:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:54:09,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:54:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:54:12,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:54:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:54:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:54:12,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:54:12,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694155776] [2023-02-15 21:54:12,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694155776] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:54:12,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223311003] [2023-02-15 21:54:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:54:12,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:54:12,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:54:12,301 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:54:12,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 21:54:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:54:12,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-15 21:54:12,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:54:12,590 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 21:54:12,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 21:54:12,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 21:54:12,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-15 21:54:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:12,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 21:54:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:12,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2023-02-15 21:54:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:12,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 21:54:12,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:12,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2023-02-15 21:54:13,205 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 21:54:13,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 42 [2023-02-15 21:54:13,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:13,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-02-15 21:54:13,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:13,439 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:54:13,482 INFO L321 Elim1Store]: treesize reduction 88, result has 40.5 percent of original size [2023-02-15 21:54:13,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 122 [2023-02-15 21:54:13,509 INFO L321 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-02-15 21:54:13,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 76 [2023-02-15 21:54:13,573 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 21:54:14,159 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:54:14,179 INFO L321 Elim1Store]: treesize reduction 18, result has 53.8 percent of original size [2023-02-15 21:54:14,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2023-02-15 21:54:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:54:14,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:54:14,208 INFO L321 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2023-02-15 21:54:14,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 95 treesize of output 69 [2023-02-15 21:54:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:54:14,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:54:25,291 INFO L321 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2023-02-15 21:54:25,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 144 [2023-02-15 21:54:25,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:54:25,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 396 [2023-02-15 21:54:25,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2023-02-15 21:54:48,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223311003] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:54:48,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:54:48,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 46 [2023-02-15 21:54:48,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622669710] [2023-02-15 21:54:48,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:54:48,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 21:54:48,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:54:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 21:54:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=3624, Unknown=15, NotChecked=0, Total=3906 [2023-02-15 21:54:48,513 INFO L87 Difference]: Start difference. First operand 1284 states and 1766 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:54:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:54:56,340 INFO L93 Difference]: Finished difference Result 1463 states and 1971 transitions. [2023-02-15 21:54:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 21:54:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-02-15 21:54:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:54:56,344 INFO L225 Difference]: With dead ends: 1463 [2023-02-15 21:54:56,344 INFO L226 Difference]: Without dead ends: 1463 [2023-02-15 21:54:56,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=1165, Invalid=7940, Unknown=15, NotChecked=0, Total=9120 [2023-02-15 21:54:56,346 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1094 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 3468 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:54:56,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 3468 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 21:54:56,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2023-02-15 21:54:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1368. [2023-02-15 21:54:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1212 states have (on average 1.396864686468647) internal successors, (1693), 1288 states have internal predecessors, (1693), 64 states have call successors, (64), 30 states have call predecessors, (64), 60 states have return successors, (128), 49 states have call predecessors, (128), 64 states have call successors, (128) [2023-02-15 21:54:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1885 transitions. [2023-02-15 21:54:56,363 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1885 transitions. Word has length 50 [2023-02-15 21:54:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:54:56,364 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1885 transitions. [2023-02-15 21:54:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:54:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1885 transitions. [2023-02-15 21:54:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 21:54:56,366 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:54:56,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:54:56,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-15 21:54:56,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-02-15 21:54:56,571 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 21:54:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:54:56,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1185029576, now seen corresponding path program 1 times [2023-02-15 21:54:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:54:56,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491689121] [2023-02-15 21:54:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:54:56,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:54:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat