./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8 --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 6c2ed91303515fb47ae50633bb4ba0c83e07781b13d03a95e0e32251f9fc3016 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:04:29,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:04:29,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:04:29,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:04:29,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:04:29,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:04:29,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:04:29,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:04:29,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:04:29,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:04:29,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:04:29,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:04:29,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:04:29,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:04:29,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:04:29,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:04:29,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:04:29,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:04:29,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:04:29,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:04:29,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:04:29,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:04:29,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:04:29,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:04:29,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:04:29,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:04:29,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:04:29,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:04:29,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:04:29,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:04:29,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:04:29,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:04:29,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:04:29,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:04:29,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:04:29,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:04:29,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:04:29,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:04:29,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:04:29,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:04:29,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:04:29,375 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:04:29,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:04:29,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:04:29,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:04:29,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:04:29,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:04:29,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:04:29,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:04:29,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:04:29,393 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:04:29,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:04:29,393 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:04:29,393 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:04:29,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:04:29,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:04:29,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:04:29,394 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:04:29,394 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:04:29,394 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:04:29,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:04:29,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:04:29,394 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:04:29,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:04:29,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:04:29,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:04:29,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:04:29,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:04:29,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:04:29,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:04:29,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:04:29,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:04:29,396 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:04:29,396 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:04:29,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:04:29,396 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:04:29,396 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c2ed91303515fb47ae50633bb4ba0c83e07781b13d03a95e0e32251f9fc3016 [2022-12-13 18:04:29,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:04:29,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:04:29,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:04:29,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:04:29,587 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:04:29,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/list-simple/dll2c_remove_all.i [2022-12-13 18:04:32,221 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:04:32,410 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:04:32,410 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/sv-benchmarks/c/list-simple/dll2c_remove_all.i [2022-12-13 18:04:32,418 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/data/12b27e25e/938dcfe965a246d08c64b090956377ee/FLAG72a74e899 [2022-12-13 18:04:32,428 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/data/12b27e25e/938dcfe965a246d08c64b090956377ee [2022-12-13 18:04:32,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:04:32,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:04:32,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:04:32,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:04:32,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:04:32,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ae90f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32, skipping insertion in model container [2022-12-13 18:04:32,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:04:32,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:04:32,654 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/sv-benchmarks/c/list-simple/dll2c_remove_all.i[24169,24182] [2022-12-13 18:04:32,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:04:32,663 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:04:32,693 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/sv-benchmarks/c/list-simple/dll2c_remove_all.i[24169,24182] [2022-12-13 18:04:32,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:04:32,713 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:04:32,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32 WrapperNode [2022-12-13 18:04:32,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:04:32,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:04:32,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:04:32,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:04:32,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,743 INFO L138 Inliner]: procedures = 126, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 111 [2022-12-13 18:04:32,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:04:32,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:04:32,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:04:32,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:04:32,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,762 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:04:32,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:04:32,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:04:32,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:04:32,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (1/1) ... [2022-12-13 18:04:32,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:04:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:04:32,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:04:32,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:04:32,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:04:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-12-13 18:04:32,817 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-12-13 18:04:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:04:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:04:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:04:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 18:04:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 18:04:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:04:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 18:04:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:04:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:04:32,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:04:32,907 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:04:32,910 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:04:33,179 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:04:33,184 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:04:33,184 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 18:04:33,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:04:33 BoogieIcfgContainer [2022-12-13 18:04:33,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:04:33,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:04:33,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:04:33,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:04:33,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:04:32" (1/3) ... [2022-12-13 18:04:33,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c205a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:04:33, skipping insertion in model container [2022-12-13 18:04:33,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:04:32" (2/3) ... [2022-12-13 18:04:33,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c205a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:04:33, skipping insertion in model container [2022-12-13 18:04:33,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:04:33" (3/3) ... [2022-12-13 18:04:33,193 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all.i [2022-12-13 18:04:33,207 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:04:33,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2022-12-13 18:04:33,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:04:33,245 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;@35134776, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:04:33,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-12-13 18:04:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 48 states have (on average 2.125) internal successors, (102), 94 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:04:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 18:04:33,253 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:33,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:04:33,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:33,258 INFO L85 PathProgramCache]: Analyzing trace with hash 893702386, now seen corresponding path program 1 times [2022-12-13 18:04:33,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:33,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917847723] [2022-12-13 18:04:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:33,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:04:33,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:33,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917847723] [2022-12-13 18:04:33,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917847723] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:33,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:33,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:04:33,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437598308] [2022-12-13 18:04:33,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:33,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:04:33,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:04:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:04:33,465 INFO L87 Difference]: Start difference. First operand has 98 states, 48 states have (on average 2.125) internal successors, (102), 94 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:33,560 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2022-12-13 18:04:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:04:33,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 18:04:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:33,567 INFO L225 Difference]: With dead ends: 95 [2022-12-13 18:04:33,568 INFO L226 Difference]: Without dead ends: 92 [2022-12-13 18:04:33,569 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 [2022-12-13 18:04:33,571 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:33,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 136 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:04:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-13 18:04:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-12-13 18:04:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 46 states have (on average 2.0) internal successors, (92), 88 states have internal predecessors, (92), 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) [2022-12-13 18:04:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-12-13 18:04:33,602 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 6 [2022-12-13 18:04:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:33,602 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-12-13 18:04:33,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-12-13 18:04:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 18:04:33,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:33,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:04:33,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:04:33,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:33,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:33,604 INFO L85 PathProgramCache]: Analyzing trace with hash 893702387, now seen corresponding path program 1 times [2022-12-13 18:04:33,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:33,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353703039] [2022-12-13 18:04:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:33,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:04:33,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:33,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353703039] [2022-12-13 18:04:33,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353703039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:33,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:33,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:04:33,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992712641] [2022-12-13 18:04:33,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:33,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:04:33,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:04:33,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:04:33,694 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:33,761 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2022-12-13 18:04:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:04:33,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 18:04:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:33,763 INFO L225 Difference]: With dead ends: 89 [2022-12-13 18:04:33,763 INFO L226 Difference]: Without dead ends: 89 [2022-12-13 18:04:33,763 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 [2022-12-13 18:04:33,764 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:33,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 138 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:04:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-13 18:04:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-12-13 18:04:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 46 states have (on average 1.934782608695652) internal successors, (89), 85 states have internal predecessors, (89), 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) [2022-12-13 18:04:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-12-13 18:04:33,770 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 6 [2022-12-13 18:04:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:33,770 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-12-13 18:04:33,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-12-13 18:04:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 18:04:33,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:33,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:33,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:04:33,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash -413883200, now seen corresponding path program 1 times [2022-12-13 18:04:33,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:33,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376785402] [2022-12-13 18:04:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:33,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:33,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:04:33,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:33,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376785402] [2022-12-13 18:04:33,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376785402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:33,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:33,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:04:33,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586000503] [2022-12-13 18:04:33,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:33,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:04:33,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:33,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:04:33,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:04:33,880 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-13 18:04:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:33,971 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2022-12-13 18:04:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:04:33,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14 [2022-12-13 18:04:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:33,972 INFO L225 Difference]: With dead ends: 100 [2022-12-13 18:04:33,972 INFO L226 Difference]: Without dead ends: 100 [2022-12-13 18:04:33,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:04:33,973 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 10 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:33,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 206 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:04:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-13 18:04:33,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2022-12-13 18:04:33,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 86 states have internal predecessors, (90), 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) [2022-12-13 18:04:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-12-13 18:04:33,983 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 14 [2022-12-13 18:04:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:33,983 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-12-13 18:04:33,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-13 18:04:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-12-13 18:04:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:04:33,984 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:33,984 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:33,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:04:33,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:33,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1410538016, now seen corresponding path program 1 times [2022-12-13 18:04:33,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:33,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995929193] [2022-12-13 18:04:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:33,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:34,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:34,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:04:34,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:34,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995929193] [2022-12-13 18:04:34,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995929193] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:34,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:34,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:04:34,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845047326] [2022-12-13 18:04:34,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:34,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:04:34,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:34,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:04:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:04:34,162 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:34,367 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2022-12-13 18:04:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:04:34,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-12-13 18:04:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:34,370 INFO L225 Difference]: With dead ends: 139 [2022-12-13 18:04:34,370 INFO L226 Difference]: Without dead ends: 139 [2022-12-13 18:04:34,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:04:34,372 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 69 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:34,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 240 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:04:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-13 18:04:34,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 89. [2022-12-13 18:04:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 85 states have internal predecessors, (89), 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) [2022-12-13 18:04:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-12-13 18:04:34,378 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 24 [2022-12-13 18:04:34,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:34,379 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-12-13 18:04:34,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-12-13 18:04:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:04:34,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:34,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:34,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 18:04:34,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:34,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1410538017, now seen corresponding path program 1 times [2022-12-13 18:04:34,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:34,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934060892] [2022-12-13 18:04:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:34,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:34,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:34,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:34,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:34,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934060892] [2022-12-13 18:04:34,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934060892] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:34,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:34,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:04:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433063537] [2022-12-13 18:04:34,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:34,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:04:34,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:34,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:04:34,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:04:34,608 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:34,758 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-12-13 18:04:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:04:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-12-13 18:04:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:34,759 INFO L225 Difference]: With dead ends: 89 [2022-12-13 18:04:34,760 INFO L226 Difference]: Without dead ends: 89 [2022-12-13 18:04:34,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:04:34,760 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 78 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:34,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 230 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:04:34,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-13 18:04:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-12-13 18:04:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 47 states have (on average 1.872340425531915) internal successors, (88), 84 states have internal predecessors, (88), 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) [2022-12-13 18:04:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-12-13 18:04:34,764 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 24 [2022-12-13 18:04:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:34,764 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-12-13 18:04:34,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-12-13 18:04:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 18:04:34,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:34,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:34,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 18:04:34,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:34,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:34,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1682632447, now seen corresponding path program 1 times [2022-12-13 18:04:34,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:34,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108450831] [2022-12-13 18:04:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:34,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:34,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:34,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:34,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:34,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108450831] [2022-12-13 18:04:34,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108450831] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:34,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232677737] [2022-12-13 18:04:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:34,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:34,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:04:34,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:04:34,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:04:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:35,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:04:35,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:04:35,112 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 [2022-12-13 18:04:35,158 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_352 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_352))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-12-13 18:04:35,236 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 18:04:35,236 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 [2022-12-13 18:04:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-12-13 18:04:35,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:04:35,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232677737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:35,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:04:35,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-12-13 18:04:35,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707629106] [2022-12-13 18:04:35,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:04:35,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:04:35,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:35,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:04:35,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2022-12-13 18:04:35,304 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:04:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:35,630 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2022-12-13 18:04:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:04:35,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-12-13 18:04:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:35,631 INFO L225 Difference]: With dead ends: 144 [2022-12-13 18:04:35,632 INFO L226 Difference]: Without dead ends: 144 [2022-12-13 18:04:35,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2022-12-13 18:04:35,632 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 57 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:35,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 331 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 461 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2022-12-13 18:04:35,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-12-13 18:04:35,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 93. [2022-12-13 18:04:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 88 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2022-12-13 18:04:35,637 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 26 [2022-12-13 18:04:35,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:35,637 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2022-12-13 18:04:35,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:04:35,638 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2022-12-13 18:04:35,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 18:04:35,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:35,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:35,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:04:35,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 18:04:35,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:35,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:35,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1682632446, now seen corresponding path program 1 times [2022-12-13 18:04:35,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:35,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558940209] [2022-12-13 18:04:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:35,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:36,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:36,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:36,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558940209] [2022-12-13 18:04:36,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558940209] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:36,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179173753] [2022-12-13 18:04:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:36,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:04:36,207 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:04:36,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:04:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:36,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 18:04:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:04:36,295 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 [2022-12-13 18:04:36,499 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 18:04:36,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-13 18:04:36,513 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:04:36,513 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 [2022-12-13 18:04:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:04:36,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:04:40,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179173753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:40,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:04:40,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-12-13 18:04:40,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698163027] [2022-12-13 18:04:40,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:04:40,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 18:04:40,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:40,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 18:04:40,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-12-13 18:04:40,717 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 18:04:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:41,147 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2022-12-13 18:04:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:04:41,148 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-12-13 18:04:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:41,149 INFO L225 Difference]: With dead ends: 95 [2022-12-13 18:04:41,149 INFO L226 Difference]: Without dead ends: 95 [2022-12-13 18:04:41,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-12-13 18:04:41,150 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 19 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:41,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 532 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:04:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-13 18:04:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-12-13 18:04:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 88 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2022-12-13 18:04:41,156 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 26 [2022-12-13 18:04:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:41,156 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2022-12-13 18:04:41,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 18:04:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2022-12-13 18:04:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 18:04:41,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:41,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:41,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:04:41,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:41,359 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:41,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:41,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2101924137, now seen corresponding path program 1 times [2022-12-13 18:04:41,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:41,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785302602] [2022-12-13 18:04:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:41,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:41,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:41,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:41,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:41,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785302602] [2022-12-13 18:04:41,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785302602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:41,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161114320] [2022-12-13 18:04:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:41,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:04:41,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:04:41,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:04:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:04:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:04:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:41,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:04:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:41,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161114320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:04:41,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:04:41,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-12-13 18:04:41,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815236829] [2022-12-13 18:04:41,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:04:41,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:04:41,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:41,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:04:41,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:04:41,780 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:04:41,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:41,888 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-12-13 18:04:41,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:04:41,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-13 18:04:41,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:41,890 INFO L225 Difference]: With dead ends: 94 [2022-12-13 18:04:41,890 INFO L226 Difference]: Without dead ends: 94 [2022-12-13 18:04:41,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:04:41,891 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 4 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:41,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 419 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:04:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-13 18:04:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-12-13 18:04:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.803921568627451) internal successors, (92), 88 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2022-12-13 18:04:41,895 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 28 [2022-12-13 18:04:41,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:41,896 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2022-12-13 18:04:41,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:04:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2022-12-13 18:04:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 18:04:41,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:41,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:41,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:04:42,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:42,098 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:42,099 INFO L85 PathProgramCache]: Analyzing trace with hash -739919470, now seen corresponding path program 1 times [2022-12-13 18:04:42,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:42,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384374752] [2022-12-13 18:04:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:42,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:42,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:42,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 18:04:42,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:42,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384374752] [2022-12-13 18:04:42,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384374752] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222082731] [2022-12-13 18:04:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:42,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:42,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:04:42,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:04:42,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:04:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:42,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:04:42,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:04:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 18:04:42,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:04:42,417 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:04:42,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-12-13 18:04:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 18:04:42,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222082731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:04:42,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:04:42,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-12-13 18:04:42,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394631646] [2022-12-13 18:04:42,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:04:42,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:04:42,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:04:42,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:04:42,436 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:04:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:42,591 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2022-12-13 18:04:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:04:42,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-12-13 18:04:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:42,593 INFO L225 Difference]: With dead ends: 147 [2022-12-13 18:04:42,593 INFO L226 Difference]: Without dead ends: 147 [2022-12-13 18:04:42,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:04:42,594 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 107 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:42,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 223 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:04:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-13 18:04:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 96. [2022-12-13 18:04:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 91 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-12-13 18:04:42,598 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 29 [2022-12-13 18:04:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:42,598 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-12-13 18:04:42,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:04:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-12-13 18:04:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 18:04:42,598 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:42,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:42,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:04:42,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 18:04:42,799 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash -739919469, now seen corresponding path program 1 times [2022-12-13 18:04:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:42,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758507046] [2022-12-13 18:04:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:42,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:42,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:42,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:42,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758507046] [2022-12-13 18:04:42,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758507046] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:42,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411083319] [2022-12-13 18:04:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:42,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:04:42,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:04:42,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:04:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:43,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 18:04:43,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:04:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:43,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:04:43,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:04:43,183 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 20 treesize of output 24 [2022-12-13 18:04:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:43,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411083319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:04:43,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:04:43,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-12-13 18:04:43,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473649200] [2022-12-13 18:04:43,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:04:43,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 18:04:43,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:43,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 18:04:43,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:04:43,288 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 18:04:43,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:43,586 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-12-13 18:04:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:04:43,587 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-12-13 18:04:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:43,588 INFO L225 Difference]: With dead ends: 160 [2022-12-13 18:04:43,588 INFO L226 Difference]: Without dead ends: 160 [2022-12-13 18:04:43,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:04:43,589 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 136 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:43,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 597 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 18:04:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-13 18:04:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 96. [2022-12-13 18:04:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2022-12-13 18:04:43,592 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 29 [2022-12-13 18:04:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:43,593 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2022-12-13 18:04:43,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 18:04:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2022-12-13 18:04:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 18:04:43,593 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:43,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:43,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 18:04:43,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 18:04:43,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:43,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:43,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1462667085, now seen corresponding path program 1 times [2022-12-13 18:04:43,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:43,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823704484] [2022-12-13 18:04:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:43,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:43,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:43,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:04:43,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:43,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823704484] [2022-12-13 18:04:43,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823704484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:43,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:43,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 18:04:43,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476585180] [2022-12-13 18:04:43,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:43,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:04:43,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:04:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:04:43,917 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:44,127 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2022-12-13 18:04:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:04:44,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-12-13 18:04:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:44,129 INFO L225 Difference]: With dead ends: 145 [2022-12-13 18:04:44,129 INFO L226 Difference]: Without dead ends: 145 [2022-12-13 18:04:44,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:04:44,129 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 120 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:44,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 264 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:04:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-13 18:04:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 95. [2022-12-13 18:04:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2022-12-13 18:04:44,132 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 30 [2022-12-13 18:04:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:44,132 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2022-12-13 18:04:44,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:44,133 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2022-12-13 18:04:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 18:04:44,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:44,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:44,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 18:04:44,133 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1462667084, now seen corresponding path program 1 times [2022-12-13 18:04:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:44,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582052412] [2022-12-13 18:04:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:44,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:44,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:44,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:44,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:44,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582052412] [2022-12-13 18:04:44,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582052412] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:44,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:44,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 18:04:44,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413305138] [2022-12-13 18:04:44,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:44,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 18:04:44,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 18:04:44,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:04:44,329 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:44,514 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-12-13 18:04:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:04:44,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-12-13 18:04:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:44,515 INFO L225 Difference]: With dead ends: 94 [2022-12-13 18:04:44,515 INFO L226 Difference]: Without dead ends: 94 [2022-12-13 18:04:44,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:04:44,515 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 143 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:44,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 231 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:04:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-13 18:04:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-12-13 18:04:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 89 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2022-12-13 18:04:44,518 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 30 [2022-12-13 18:04:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:44,518 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2022-12-13 18:04:44,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2022-12-13 18:04:44,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 18:04:44,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:44,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:44,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 18:04:44,519 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:44,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2100539926, now seen corresponding path program 1 times [2022-12-13 18:04:44,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:44,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951520799] [2022-12-13 18:04:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:44,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:44,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:44,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:04:44,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:44,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951520799] [2022-12-13 18:04:44,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951520799] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:44,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:44,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:04:44,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796482306] [2022-12-13 18:04:44,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:44,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:04:44,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:44,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:04:44,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:04:44,727 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-12-13 18:04:44,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:44,869 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2022-12-13 18:04:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:04:44,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 34 [2022-12-13 18:04:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:44,871 INFO L225 Difference]: With dead ends: 133 [2022-12-13 18:04:44,871 INFO L226 Difference]: Without dead ends: 133 [2022-12-13 18:04:44,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:04:44,871 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 126 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:44,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 159 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:04:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-13 18:04:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 93. [2022-12-13 18:04:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 88 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2022-12-13 18:04:44,875 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 34 [2022-12-13 18:04:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:44,875 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2022-12-13 18:04:44,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-12-13 18:04:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2022-12-13 18:04:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 18:04:44,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:44,875 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 18:04:44,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:44,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2100539927, now seen corresponding path program 1 times [2022-12-13 18:04:44,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:44,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064447800] [2022-12-13 18:04:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:44,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:45,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:45,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:45,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:45,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064447800] [2022-12-13 18:04:45,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064447800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:45,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049713779] [2022-12-13 18:04:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:45,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:45,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:04:45,245 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:04:45,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:04:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:45,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 18:04:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:04:45,399 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 [2022-12-13 18:04:45,422 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 5 treesize of output 3 [2022-12-13 18:04:45,440 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1408 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1408))))) is different from true [2022-12-13 18:04:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:04:45,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:04:45,505 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 5 treesize of output 3 [2022-12-13 18:04:45,512 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1409 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1409) |c_#length|)))) is different from true [2022-12-13 18:04:45,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:04:45,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:04:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2022-12-13 18:04:45,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:04:45,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049713779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:45,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:04:45,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2022-12-13 18:04:45,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289005503] [2022-12-13 18:04:45,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:04:45,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:04:45,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:45,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:04:45,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=251, Unknown=2, NotChecked=66, Total=380 [2022-12-13 18:04:45,762 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 18:04:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:46,105 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-12-13 18:04:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:04:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-12-13 18:04:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:46,106 INFO L225 Difference]: With dead ends: 90 [2022-12-13 18:04:46,106 INFO L226 Difference]: Without dead ends: 90 [2022-12-13 18:04:46,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=400, Unknown=2, NotChecked=86, Total=600 [2022-12-13 18:04:46,107 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 218 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:46,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 228 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 329 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-12-13 18:04:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-13 18:04:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2022-12-13 18:04:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 80 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-12-13 18:04:46,109 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 34 [2022-12-13 18:04:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:46,109 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-12-13 18:04:46,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 18:04:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-12-13 18:04:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 18:04:46,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:46,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:46,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 18:04:46,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 18:04:46,312 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:46,313 INFO L85 PathProgramCache]: Analyzing trace with hash 692228289, now seen corresponding path program 1 times [2022-12-13 18:04:46,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:46,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657715164] [2022-12-13 18:04:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:46,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:46,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:46,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:04:46,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:46,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657715164] [2022-12-13 18:04:46,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657715164] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:46,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:46,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 18:04:46,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117495049] [2022-12-13 18:04:46,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:46,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:04:46,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:46,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:04:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:04:46,533 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:46,823 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2022-12-13 18:04:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 18:04:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-12-13 18:04:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:46,824 INFO L225 Difference]: With dead ends: 119 [2022-12-13 18:04:46,824 INFO L226 Difference]: Without dead ends: 119 [2022-12-13 18:04:46,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:04:46,825 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 174 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:46,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 329 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:04:46,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-13 18:04:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 86. [2022-12-13 18:04:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 81 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2022-12-13 18:04:46,828 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 35 [2022-12-13 18:04:46,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:46,829 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2022-12-13 18:04:46,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:46,829 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2022-12-13 18:04:46,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 18:04:46,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:46,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:46,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 18:04:46,830 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash 692228290, now seen corresponding path program 1 times [2022-12-13 18:04:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:46,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824449540] [2022-12-13 18:04:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:46,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:47,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:47,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:47,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:47,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824449540] [2022-12-13 18:04:47,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824449540] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:47,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:47,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 18:04:47,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965941627] [2022-12-13 18:04:47,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:47,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:04:47,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:04:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:04:47,143 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:47,448 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2022-12-13 18:04:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:04:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-12-13 18:04:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:47,449 INFO L225 Difference]: With dead ends: 109 [2022-12-13 18:04:47,449 INFO L226 Difference]: Without dead ends: 109 [2022-12-13 18:04:47,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:04:47,450 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 296 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:47,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 316 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:04:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-13 18:04:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2022-12-13 18:04:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.5) internal successors, (87), 81 states have internal predecessors, (87), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-12-13 18:04:47,453 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 35 [2022-12-13 18:04:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:47,453 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-12-13 18:04:47,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-12-13 18:04:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 18:04:47,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:47,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:47,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 18:04:47,454 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:47,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:47,454 INFO L85 PathProgramCache]: Analyzing trace with hash -15762412, now seen corresponding path program 1 times [2022-12-13 18:04:47,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:47,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867104989] [2022-12-13 18:04:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:47,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:47,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:47,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:04:47,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:47,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867104989] [2022-12-13 18:04:47,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867104989] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:47,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:47,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:04:47,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249593792] [2022-12-13 18:04:47,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:47,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:04:47,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:47,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:04:47,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:04:47,534 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-12-13 18:04:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:47,593 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-12-13 18:04:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:04:47,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 36 [2022-12-13 18:04:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:47,594 INFO L225 Difference]: With dead ends: 118 [2022-12-13 18:04:47,594 INFO L226 Difference]: Without dead ends: 118 [2022-12-13 18:04:47,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:04:47,595 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 89 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:47,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 178 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:04:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-12-13 18:04:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 85. [2022-12-13 18:04:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 80 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2022-12-13 18:04:47,598 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 36 [2022-12-13 18:04:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:47,598 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2022-12-13 18:04:47,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-12-13 18:04:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2022-12-13 18:04:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 18:04:47,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:47,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:47,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 18:04:47,599 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:47,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1420434319, now seen corresponding path program 1 times [2022-12-13 18:04:47,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:47,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189050020] [2022-12-13 18:04:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:47,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:47,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:47,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:04:47,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:47,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189050020] [2022-12-13 18:04:47,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189050020] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:47,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:47,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:04:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319190785] [2022-12-13 18:04:47,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:47,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:04:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:04:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:04:47,693 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-12-13 18:04:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:47,792 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-12-13 18:04:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:04:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 40 [2022-12-13 18:04:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:47,793 INFO L225 Difference]: With dead ends: 84 [2022-12-13 18:04:47,793 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 18:04:47,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:04:47,794 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 18 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:47,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 198 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:04:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 18:04:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-13 18:04:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 79 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-12-13 18:04:47,797 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 40 [2022-12-13 18:04:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:47,797 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-12-13 18:04:47,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-12-13 18:04:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-12-13 18:04:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 18:04:47,798 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:47,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:47,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 18:04:47,798 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:47,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1420434320, now seen corresponding path program 1 times [2022-12-13 18:04:47,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:47,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440312021] [2022-12-13 18:04:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:47,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:48,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:48,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:48,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:48,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440312021] [2022-12-13 18:04:48,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440312021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:48,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:48,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 18:04:48,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672848885] [2022-12-13 18:04:48,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:48,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 18:04:48,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:48,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 18:04:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:04:48,155 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:48,467 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-12-13 18:04:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 18:04:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-12-13 18:04:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:48,468 INFO L225 Difference]: With dead ends: 102 [2022-12-13 18:04:48,468 INFO L226 Difference]: Without dead ends: 102 [2022-12-13 18:04:48,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-12-13 18:04:48,469 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 267 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:48,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 407 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:04:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-13 18:04:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-12-13 18:04:48,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 84 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2022-12-13 18:04:48,472 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 40 [2022-12-13 18:04:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:48,472 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2022-12-13 18:04:48,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2022-12-13 18:04:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 18:04:48,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:48,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:48,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 18:04:48,473 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:48,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:48,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1420420416, now seen corresponding path program 1 times [2022-12-13 18:04:48,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:48,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783419066] [2022-12-13 18:04:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:48,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:48,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:48,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:48,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:48,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783419066] [2022-12-13 18:04:48,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783419066] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:48,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:48,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 18:04:48,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521855654] [2022-12-13 18:04:48,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:48,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:04:48,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:48,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:04:48,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:04:48,624 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:48,872 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2022-12-13 18:04:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:04:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-12-13 18:04:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:48,873 INFO L225 Difference]: With dead ends: 128 [2022-12-13 18:04:48,873 INFO L226 Difference]: Without dead ends: 128 [2022-12-13 18:04:48,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-12-13 18:04:48,874 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 332 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:48,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 382 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:04:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-12-13 18:04:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 101. [2022-12-13 18:04:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.4864864864864864) internal successors, (110), 96 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:04:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2022-12-13 18:04:48,877 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 40 [2022-12-13 18:04:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:48,877 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2022-12-13 18:04:48,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2022-12-13 18:04:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 18:04:48,878 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:48,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:48,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 18:04:48,878 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash 449018579, now seen corresponding path program 1 times [2022-12-13 18:04:48,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:48,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279097526] [2022-12-13 18:04:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:48,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:48,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:48,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:48,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 18:04:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 18:04:48,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:48,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279097526] [2022-12-13 18:04:48,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279097526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:48,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579864597] [2022-12-13 18:04:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:48,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:48,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:04:48,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:04:48,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:04:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:49,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:04:49,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:04:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 18:04:49,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:04:49,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579864597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:49,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:04:49,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-12-13 18:04:49,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225144220] [2022-12-13 18:04:49,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:49,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:04:49,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:49,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:04:49,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:04:49,124 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:04:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:49,132 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-12-13 18:04:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:04:49,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-12-13 18:04:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:49,133 INFO L225 Difference]: With dead ends: 89 [2022-12-13 18:04:49,133 INFO L226 Difference]: Without dead ends: 89 [2022-12-13 18:04:49,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:04:49,134 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 51 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:49,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 93 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:04:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-13 18:04:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-12-13 18:04:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 85 states have internal predecessors, (96), 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) [2022-12-13 18:04:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2022-12-13 18:04:49,136 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 41 [2022-12-13 18:04:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:49,136 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2022-12-13 18:04:49,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:04:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2022-12-13 18:04:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 18:04:49,137 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:49,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:49,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:04:49,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 18:04:49,337 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:49,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1083360035, now seen corresponding path program 1 times [2022-12-13 18:04:49,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:49,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844335520] [2022-12-13 18:04:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:49,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:49,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:49,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:49,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:49,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844335520] [2022-12-13 18:04:49,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844335520] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:49,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:49,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 18:04:49,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615814955] [2022-12-13 18:04:49,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:49,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:04:49,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:04:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:04:49,513 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:49,723 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2022-12-13 18:04:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 18:04:49,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2022-12-13 18:04:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:49,724 INFO L225 Difference]: With dead ends: 100 [2022-12-13 18:04:49,724 INFO L226 Difference]: Without dead ends: 100 [2022-12-13 18:04:49,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-12-13 18:04:49,725 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 242 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:49,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 285 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:04:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-13 18:04:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2022-12-13 18:04:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 88 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:04:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-12-13 18:04:49,727 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 41 [2022-12-13 18:04:49,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:49,727 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-12-13 18:04:49,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:04:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-12-13 18:04:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 18:04:49,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:49,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:49,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 18:04:49,728 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 18:04:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:49,729 INFO L85 PathProgramCache]: Analyzing trace with hash -762217872, now seen corresponding path program 1 times [2022-12-13 18:04:49,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:49,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311940059] [2022-12-13 18:04:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:49,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:50,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:04:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:50,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:04:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:50,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:50,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311940059] [2022-12-13 18:04:50,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311940059] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:50,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700491266] [2022-12-13 18:04:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:50,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:50,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:04:50,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:04:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4576390a-6392-48e7-a096-b32a4aaa927b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:04:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:50,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-13 18:04:50,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:04:50,396 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 [2022-12-13 18:04:50,488 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:04:50,488 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 [2022-12-13 18:04:50,553 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 11 treesize of output 7 [2022-12-13 18:04:50,603 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 [2022-12-13 18:04:50,689 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 [2022-12-13 18:04:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:04:50,735 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 35 treesize of output 26 [2022-12-13 18:04:51,109 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-12-13 18:04:51,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 26 [2022-12-13 18:04:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:04:51,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:04:51,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-12-13 18:04:51,320 INFO L321 Elim1Store]: treesize reduction 5, result has 89.6 percent of original size [2022-12-13 18:04:51,321 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 52 treesize of output 51 [2022-12-13 18:04:51,329 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2551 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2551))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select .cse0 .cse1) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)))))) is different from false [2022-12-13 18:04:51,349 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2551 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2551))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select .cse1 .cse0) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))))) is different from false [2022-12-13 18:04:51,360 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2551 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_2550 (Array Int Int))) (let ((.cse0 (let ((.cse2 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_2550) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2551))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select .cse0 .cse1) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))))) is different from false [2022-12-13 18:04:51,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:04:51,376 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 1 case distinctions, treesize of input 134 treesize of output 94 [2022-12-13 18:04:51,632 INFO L321 Elim1Store]: treesize reduction 157, result has 55.3 percent of original size [2022-12-13 18:04:51,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 52704 treesize of output 49444 [2022-12-13 18:04:52,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:04:52,177 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 54889 treesize of output 51803 [2022-12-13 18:04:53,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:04:53,647 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 56929 treesize of output 54925 [2022-12-13 18:05:23,206 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 52770 treesize of output 52722