./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.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_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/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_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/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_0322090e-7d5b-41a0-9b06-0137ba72eb97/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 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 --- 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 22:28:04,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:28:04,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:28:04,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:28:04,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:28:04,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:28:04,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:28:04,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:28:04,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:28:04,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:28:04,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:28:04,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:28:04,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:28:04,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:28:04,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:28:04,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:28:04,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:28:04,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:28:04,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:28:04,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:28:04,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:28:04,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:28:04,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:28:04,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:28:04,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:28:04,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:28:04,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:28:04,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:28:04,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:28:04,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:28:04,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:28:04,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:28:04,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:28:04,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:28:04,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:28:04,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:28:04,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:28:04,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:28:04,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:28:04,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:28:04,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:28:04,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 22:28:04,415 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:28:04,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:28:04,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:28:04,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:28:04,416 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:28:04,416 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:28:04,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:28:04,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:28:04,416 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:28:04,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:28:04,417 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:28:04,417 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 22:28:04,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:28:04,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:28:04,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:28:04,417 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 22:28:04,417 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 22:28:04,417 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 22:28:04,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:28:04,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 22:28:04,418 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:28:04,418 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:28:04,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:28:04,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:28:04,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:28:04,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:28:04,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:28:04,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:28:04,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:28:04,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:28:04,418 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:28:04,419 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:28:04,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:28:04,419 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:28:04,419 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_0322090e-7d5b-41a0-9b06-0137ba72eb97/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 [2022-12-13 22:28:04,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:28:04,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:28:04,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:28:04,611 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:28:04,612 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:28:04,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2022-12-13 22:28:07,204 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:28:07,371 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:28:07,371 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2022-12-13 22:28:07,380 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/data/c926583f2/570e4f77314c449d8ff5b8b572105de3/FLAGe45c2f765 [2022-12-13 22:28:07,391 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/data/c926583f2/570e4f77314c449d8ff5b8b572105de3 [2022-12-13 22:28:07,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:28:07,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:28:07,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:28:07,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:28:07,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:28:07,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b277d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07, skipping insertion in model container [2022-12-13 22:28:07,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:28:07,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:28:07,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:28:07,639 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:28:07,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:28:07,692 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:28:07,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07 WrapperNode [2022-12-13 22:28:07,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:28:07,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:28:07,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:28:07,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:28:07,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,728 INFO L138 Inliner]: procedures = 125, calls = 94, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 304 [2022-12-13 22:28:07,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:28:07,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:28:07,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:28:07,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:28:07,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:28:07,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:28:07,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:28:07,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:28:07,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (1/1) ... [2022-12-13 22:28:07,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:28:07,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:28:07,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:28:07,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:28:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:28:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:28:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 22:28:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:28:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 22:28:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 22:28:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:28:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:28:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:28:07,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:28:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-12-13 22:28:07,810 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-12-13 22:28:07,889 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:28:07,891 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:28:08,435 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:28:08,442 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:28:08,442 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-13 22:28:08,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:28:08 BoogieIcfgContainer [2022-12-13 22:28:08,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:28:08,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:28:08,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:28:08,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:28:08,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:28:07" (1/3) ... [2022-12-13 22:28:08,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416a8822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:28:08, skipping insertion in model container [2022-12-13 22:28:08,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:28:07" (2/3) ... [2022-12-13 22:28:08,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416a8822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:28:08, skipping insertion in model container [2022-12-13 22:28:08,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:28:08" (3/3) ... [2022-12-13 22:28:08,451 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-1.i [2022-12-13 22:28:08,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:28:08,464 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2022-12-13 22:28:08,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:28:08,504 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;@1c6e361c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:28:08,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2022-12-13 22:28:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 323 states, 160 states have (on average 2.1375) internal successors, (342), 309 states have internal predecessors, (342), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 22:28:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-13 22:28:08,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:08,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-13 22:28:08,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:08,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:08,517 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-12-13 22:28:08,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:08,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40640856] [2022-12-13 22:28:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:08,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:08,650 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 22:28:08,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:08,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40640856] [2022-12-13 22:28:08,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40640856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:08,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:28:08,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:28:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149777183] [2022-12-13 22:28:08,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:08,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:28:08,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:28:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:28:08,680 INFO L87 Difference]: Start difference. First operand has 323 states, 160 states have (on average 2.1375) internal successors, (342), 309 states have internal predecessors, (342), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:09,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:09,008 INFO L93 Difference]: Finished difference Result 548 states and 601 transitions. [2022-12-13 22:28:09,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:28:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-13 22:28:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:09,021 INFO L225 Difference]: With dead ends: 548 [2022-12-13 22:28:09,021 INFO L226 Difference]: Without dead ends: 546 [2022-12-13 22:28:09,023 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 22:28:09,026 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 246 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:09,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 436 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 22:28:09,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-12-13 22:28:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 407. [2022-12-13 22:28:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 247 states have (on average 2.0890688259109313) internal successors, (516), 393 states have internal predecessors, (516), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 22:28:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 544 transitions. [2022-12-13 22:28:09,085 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 544 transitions. Word has length 3 [2022-12-13 22:28:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:09,085 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 544 transitions. [2022-12-13 22:28:09,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 544 transitions. [2022-12-13 22:28:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-13 22:28:09,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:09,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-13 22:28:09,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:28:09,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-12-13 22:28:09,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:09,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464266868] [2022-12-13 22:28:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:09,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:09,153 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 22:28:09,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:09,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464266868] [2022-12-13 22:28:09,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464266868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:09,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:28:09,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:28:09,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406859999] [2022-12-13 22:28:09,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:09,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:28:09,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:28:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:28:09,156 INFO L87 Difference]: Start difference. First operand 407 states and 544 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:09,322 INFO L93 Difference]: Finished difference Result 408 states and 547 transitions. [2022-12-13 22:28:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:28:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-13 22:28:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:09,325 INFO L225 Difference]: With dead ends: 408 [2022-12-13 22:28:09,325 INFO L226 Difference]: Without dead ends: 408 [2022-12-13 22:28:09,325 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 22:28:09,326 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 6 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:09,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 554 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:28:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-13 22:28:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 405. [2022-12-13 22:28:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 247 states have (on average 2.080971659919028) internal successors, (514), 391 states have internal predecessors, (514), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 22:28:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 542 transitions. [2022-12-13 22:28:09,344 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 542 transitions. Word has length 3 [2022-12-13 22:28:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:09,344 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 542 transitions. [2022-12-13 22:28:09,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:09,345 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 542 transitions. [2022-12-13 22:28:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 22:28:09,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:09,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:09,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:28:09,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1117390162, now seen corresponding path program 1 times [2022-12-13 22:28:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:09,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457638819] [2022-12-13 22:28:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:09,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:09,414 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 22:28:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:09,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457638819] [2022-12-13 22:28:09,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457638819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:09,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:28:09,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:28:09,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608421520] [2022-12-13 22:28:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:28:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:28:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:28:09,416 INFO L87 Difference]: Start difference. First operand 405 states and 542 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 22:28:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:09,559 INFO L93 Difference]: Finished difference Result 400 states and 537 transitions. [2022-12-13 22:28:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:28:09,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2022-12-13 22:28:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:09,562 INFO L225 Difference]: With dead ends: 400 [2022-12-13 22:28:09,562 INFO L226 Difference]: Without dead ends: 400 [2022-12-13 22:28:09,562 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 22:28:09,563 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 43 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:09,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 497 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:28:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-12-13 22:28:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-12-13 22:28:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 247 states have (on average 2.0607287449392713) internal successors, (509), 386 states have internal predecessors, (509), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 22:28:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 537 transitions. [2022-12-13 22:28:09,571 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 537 transitions. Word has length 10 [2022-12-13 22:28:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:09,572 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 537 transitions. [2022-12-13 22:28:09,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 22:28:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 537 transitions. [2022-12-13 22:28:09,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 22:28:09,572 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:09,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:09,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:28:09,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:09,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:09,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1117390163, now seen corresponding path program 1 times [2022-12-13 22:28:09,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:09,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453360124] [2022-12-13 22:28:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:09,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:09,635 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 22:28:09,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:09,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453360124] [2022-12-13 22:28:09,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453360124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:09,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:28:09,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:28:09,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459812611] [2022-12-13 22:28:09,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:09,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:28:09,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:28:09,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:28:09,637 INFO L87 Difference]: Start difference. First operand 400 states and 537 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 22:28:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:09,788 INFO L93 Difference]: Finished difference Result 395 states and 532 transitions. [2022-12-13 22:28:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:28:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2022-12-13 22:28:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:09,790 INFO L225 Difference]: With dead ends: 395 [2022-12-13 22:28:09,790 INFO L226 Difference]: Without dead ends: 395 [2022-12-13 22:28:09,791 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 22:28:09,792 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 38 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:09,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 510 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:28:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-12-13 22:28:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2022-12-13 22:28:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 247 states have (on average 2.0404858299595143) internal successors, (504), 381 states have internal predecessors, (504), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 22:28:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 532 transitions. [2022-12-13 22:28:09,803 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 532 transitions. Word has length 10 [2022-12-13 22:28:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:09,804 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 532 transitions. [2022-12-13 22:28:09,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 22:28:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 532 transitions. [2022-12-13 22:28:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 22:28:09,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:09,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:09,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 22:28:09,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:09,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash 279357079, now seen corresponding path program 1 times [2022-12-13 22:28:09,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:09,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677436114] [2022-12-13 22:28:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:09,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:09,940 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 22:28:09,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:09,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677436114] [2022-12-13 22:28:09,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677436114] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:09,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:28:09,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:28:09,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897927472] [2022-12-13 22:28:09,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:09,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:28:09,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:28:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:28:09,942 INFO L87 Difference]: Start difference. First operand 395 states and 532 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 22:28:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:10,349 INFO L93 Difference]: Finished difference Result 523 states and 574 transitions. [2022-12-13 22:28:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:28:10,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2022-12-13 22:28:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:10,352 INFO L225 Difference]: With dead ends: 523 [2022-12-13 22:28:10,352 INFO L226 Difference]: Without dead ends: 523 [2022-12-13 22:28:10,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:28:10,354 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 317 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:10,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 806 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 22:28:10,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-12-13 22:28:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 387. [2022-12-13 22:28:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 247 states have (on average 2.0080971659919027) internal successors, (496), 373 states have internal predecessors, (496), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 22:28:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 524 transitions. [2022-12-13 22:28:10,364 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 524 transitions. Word has length 11 [2022-12-13 22:28:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:10,365 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 524 transitions. [2022-12-13 22:28:10,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 22:28:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 524 transitions. [2022-12-13 22:28:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 22:28:10,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:10,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:10,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 22:28:10,365 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:10,366 INFO L85 PathProgramCache]: Analyzing trace with hash 279357080, now seen corresponding path program 1 times [2022-12-13 22:28:10,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:10,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951040410] [2022-12-13 22:28:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:10,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:10,507 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 22:28:10,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:10,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951040410] [2022-12-13 22:28:10,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951040410] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:10,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:28:10,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:28:10,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647434555] [2022-12-13 22:28:10,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:10,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:28:10,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:10,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:28:10,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:28:10,509 INFO L87 Difference]: Start difference. First operand 387 states and 524 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 22:28:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:11,066 INFO L93 Difference]: Finished difference Result 513 states and 564 transitions. [2022-12-13 22:28:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:28:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2022-12-13 22:28:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:11,067 INFO L225 Difference]: With dead ends: 513 [2022-12-13 22:28:11,067 INFO L226 Difference]: Without dead ends: 513 [2022-12-13 22:28:11,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:28:11,068 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 805 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:11,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 447 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 22:28:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-12-13 22:28:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 378. [2022-12-13 22:28:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 247 states have (on average 1.9676113360323886) internal successors, (486), 364 states have internal predecessors, (486), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 22:28:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 514 transitions. [2022-12-13 22:28:11,075 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 514 transitions. Word has length 11 [2022-12-13 22:28:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:11,075 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 514 transitions. [2022-12-13 22:28:11,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 22:28:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 514 transitions. [2022-12-13 22:28:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 22:28:11,075 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:11,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:11,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 22:28:11,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash 693745101, now seen corresponding path program 1 times [2022-12-13 22:28:11,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:11,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972525017] [2022-12-13 22:28:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:11,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:11,319 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 22:28:11,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:11,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972525017] [2022-12-13 22:28:11,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972525017] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:11,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:28:11,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 22:28:11,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152241092] [2022-12-13 22:28:11,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:11,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 22:28:11,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:11,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 22:28:11,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 22:28:11,321 INFO L87 Difference]: Start difference. First operand 378 states and 514 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 22:28:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:11,596 INFO L93 Difference]: Finished difference Result 398 states and 537 transitions. [2022-12-13 22:28:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 22:28:11,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 20 [2022-12-13 22:28:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:11,598 INFO L225 Difference]: With dead ends: 398 [2022-12-13 22:28:11,598 INFO L226 Difference]: Without dead ends: 398 [2022-12-13 22:28:11,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 22:28:11,599 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 32 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:11,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1568 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 22:28:11,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-12-13 22:28:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 386. [2022-12-13 22:28:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 254 states have (on average 1.9448818897637796) internal successors, (494), 371 states have internal predecessors, (494), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 22:28:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 524 transitions. [2022-12-13 22:28:11,610 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 524 transitions. Word has length 20 [2022-12-13 22:28:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:11,610 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 524 transitions. [2022-12-13 22:28:11,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 22:28:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 524 transitions. [2022-12-13 22:28:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 22:28:11,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:11,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:11,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 22:28:11,611 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:11,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:11,612 INFO L85 PathProgramCache]: Analyzing trace with hash -964577360, now seen corresponding path program 1 times [2022-12-13 22:28:11,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:11,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080472649] [2022-12-13 22:28:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:11,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:11,974 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 22:28:11,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:11,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080472649] [2022-12-13 22:28:11,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080472649] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:11,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:28:11,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 22:28:11,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328591752] [2022-12-13 22:28:11,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:11,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:28:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:28:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:28:11,976 INFO L87 Difference]: Start difference. First operand 386 states and 524 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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 22:28:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:12,592 INFO L93 Difference]: Finished difference Result 526 states and 579 transitions. [2022-12-13 22:28:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 22:28:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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 22 [2022-12-13 22:28:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:12,594 INFO L225 Difference]: With dead ends: 526 [2022-12-13 22:28:12,594 INFO L226 Difference]: Without dead ends: 526 [2022-12-13 22:28:12,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:28:12,595 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 755 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:12,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 1277 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 22:28:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-12-13 22:28:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 389. [2022-12-13 22:28:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 257 states have (on average 1.933852140077821) internal successors, (497), 374 states have internal predecessors, (497), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 22:28:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2022-12-13 22:28:12,601 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 22 [2022-12-13 22:28:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:12,602 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2022-12-13 22:28:12,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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 22:28:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2022-12-13 22:28:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 22:28:12,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:12,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:12,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 22:28:12,603 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:12,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:12,603 INFO L85 PathProgramCache]: Analyzing trace with hash -339455757, now seen corresponding path program 1 times [2022-12-13 22:28:12,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:12,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378710380] [2022-12-13 22:28:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:12,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:13,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 22:28:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:28:13,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:13,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378710380] [2022-12-13 22:28:13,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378710380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:28:13,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841233789] [2022-12-13 22:28:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:13,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:28:13,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:28:13,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:28:13,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:28:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:13,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 22:28:13,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:28:13,609 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 22:28:13,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 22:28:13,875 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:28:13,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-13 22:28:13,885 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 7 treesize of output 3 [2022-12-13 22:28:13,976 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:28:13,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 37 [2022-12-13 22:28:13,998 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-13 22:28:14,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:28:14,124 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-12-13 22:28:14,125 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 29 treesize of output 28 [2022-12-13 22:28:14,300 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-12-13 22:28:14,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2022-12-13 22:28:14,372 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 38 treesize of output 36 [2022-12-13 22:28:14,495 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 38 treesize of output 36 [2022-12-13 22:28:14,538 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 38 treesize of output 36 [2022-12-13 22:28:14,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:28:14,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-12-13 22:28:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:28:14,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:28:14,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:28:14,922 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 33 treesize of output 34 [2022-12-13 22:28:14,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:28:14,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 214 [2022-12-13 22:28:14,943 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 91 treesize of output 83 [2022-12-13 22:28:14,949 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 174 treesize of output 158 [2022-12-13 22:28:15,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841233789] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:28:15,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:28:15,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2022-12-13 22:28:15,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112322674] [2022-12-13 22:28:15,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:28:15,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 22:28:15,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:15,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 22:28:15,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=880, Unknown=12, NotChecked=0, Total=992 [2022-12-13 22:28:15,137 INFO L87 Difference]: Start difference. First operand 389 states and 527 transitions. Second operand has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:28:16,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:28:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:18,573 INFO L93 Difference]: Finished difference Result 529 states and 581 transitions. [2022-12-13 22:28:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 22:28:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-12-13 22:28:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:18,575 INFO L225 Difference]: With dead ends: 529 [2022-12-13 22:28:18,575 INFO L226 Difference]: Without dead ends: 529 [2022-12-13 22:28:18,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=262, Invalid=1448, Unknown=12, NotChecked=0, Total=1722 [2022-12-13 22:28:18,576 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 611 mSDsluCounter, 2267 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:18,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 2459 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-13 22:28:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-12-13 22:28:18,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 394. [2022-12-13 22:28:18,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 262 states have (on average 1.9122137404580153) internal successors, (501), 379 states have internal predecessors, (501), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 22:28:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 531 transitions. [2022-12-13 22:28:18,586 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 531 transitions. Word has length 37 [2022-12-13 22:28:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:18,586 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 531 transitions. [2022-12-13 22:28:18,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:28:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 531 transitions. [2022-12-13 22:28:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 22:28:18,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:18,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:18,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:28:18,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:28:18,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:18,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:18,790 INFO L85 PathProgramCache]: Analyzing trace with hash -339455756, now seen corresponding path program 1 times [2022-12-13 22:28:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:18,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007295931] [2022-12-13 22:28:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:18,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:19,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 22:28:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:28:19,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:19,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007295931] [2022-12-13 22:28:19,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007295931] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:28:19,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888449739] [2022-12-13 22:28:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:19,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:28:19,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:28:19,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:28:19,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:28:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 22:28:19,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:28:19,861 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 22:28:20,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 22:28:20,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 22:28:20,137 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:28:20,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-13 22:28:20,151 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:28:20,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-13 22:28:20,158 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 7 treesize of output 3 [2022-12-13 22:28:20,165 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 7 treesize of output 3 [2022-12-13 22:28:20,271 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:28:20,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 46 [2022-12-13 22:28:20,286 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:28:20,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 44 [2022-12-13 22:28:20,314 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-13 22:28:20,348 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-13 22:28:20,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:28:20,497 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-12-13 22:28:20,497 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 29 treesize of output 28 [2022-12-13 22:28:20,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:28:20,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-13 22:28:20,683 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-12-13 22:28:20,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2022-12-13 22:28:20,758 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 46 treesize of output 44 [2022-12-13 22:28:20,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-12-13 22:28:20,886 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 46 treesize of output 44 [2022-12-13 22:28:20,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-12-13 22:28:20,941 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 46 treesize of output 44 [2022-12-13 22:28:20,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-12-13 22:28:21,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:28:21,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-12-13 22:28:21,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:28:21,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-12-13 22:28:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:28:21,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:28:21,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:28:21,676 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 102 treesize of output 103 [2022-12-13 22:28:21,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:28:21,688 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 122 treesize of output 113 [2022-12-13 22:28:21,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:28:21,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 205 [2022-12-13 22:28:21,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:28:21,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1060 treesize of output 996 [2022-12-13 22:28:21,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:28:21,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1656 treesize of output 1566 [2022-12-13 22:28:21,794 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 1528 treesize of output 1388 [2022-12-13 22:28:21,812 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 1359 treesize of output 1231 [2022-12-13 22:28:21,831 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 1231 treesize of output 1159 [2022-12-13 22:28:21,855 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 1196 treesize of output 1120 [2022-12-13 22:28:21,874 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 1095 treesize of output 1079 [2022-12-13 22:28:28,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888449739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:28:28,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:28:28,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2022-12-13 22:28:28,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445719154] [2022-12-13 22:28:28,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:28:28,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 22:28:28,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 22:28:28,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=946, Unknown=13, NotChecked=0, Total=1056 [2022-12-13 22:28:28,144 INFO L87 Difference]: Start difference. First operand 394 states and 531 transitions. Second operand has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 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 22:28:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:32,296 INFO L93 Difference]: Finished difference Result 528 states and 580 transitions. [2022-12-13 22:28:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 22:28:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 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 37 [2022-12-13 22:28:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:32,298 INFO L225 Difference]: With dead ends: 528 [2022-12-13 22:28:32,298 INFO L226 Difference]: Without dead ends: 528 [2022-12-13 22:28:32,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=231, Invalid=1562, Unknown=13, NotChecked=0, Total=1806 [2022-12-13 22:28:32,299 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 855 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 4027 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 2444 SdHoareTripleChecker+Invalid, 4145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 4027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:32,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 2444 Invalid, 4145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 4027 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-13 22:28:32,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-12-13 22:28:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 393. [2022-12-13 22:28:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 262 states have (on average 1.9083969465648856) internal successors, (500), 378 states have internal predecessors, (500), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 22:28:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 530 transitions. [2022-12-13 22:28:32,305 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 530 transitions. Word has length 37 [2022-12-13 22:28:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:32,305 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 530 transitions. [2022-12-13 22:28:32,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 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 22:28:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 530 transitions. [2022-12-13 22:28:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-12-13 22:28:32,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:32,310 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:28:32,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:28:32,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 22:28:32,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:32,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:32,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2080045512, now seen corresponding path program 1 times [2022-12-13 22:28:32,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:32,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343984472] [2022-12-13 22:28:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:32,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 22:28:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 22:28:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 22:28:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 22:28:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-12-13 22:28:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-12-13 22:28:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-12-13 22:28:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-12-13 22:28:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-12-13 22:28:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-12-13 22:28:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-12-13 22:28:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-12-13 22:28:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-12-13 22:28:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-12-13 22:28:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-12-13 22:28:32,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:32,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343984472] [2022-12-13 22:28:32,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343984472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:28:32,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537373622] [2022-12-13 22:28:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:32,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:28:32,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:28:32,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:28:32,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:28:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:33,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 22:28:33,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:28:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 869 trivial. 0 not checked. [2022-12-13 22:28:33,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:28:33,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537373622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:33,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:28:33,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-13 22:28:33,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165289090] [2022-12-13 22:28:33,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:33,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:28:33,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:28:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:28:33,165 INFO L87 Difference]: Start difference. First operand 393 states and 530 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-13 22:28:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:28:33,172 INFO L93 Difference]: Finished difference Result 394 states and 531 transitions. [2022-12-13 22:28:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:28:33,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 204 [2022-12-13 22:28:33,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:28:33,174 INFO L225 Difference]: With dead ends: 394 [2022-12-13 22:28:33,174 INFO L226 Difference]: Without dead ends: 394 [2022-12-13 22:28:33,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 235 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 22:28:33,175 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 0 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:28:33,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 641 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:28:33,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-12-13 22:28:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-12-13 22:28:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 263 states have (on average 1.9049429657794676) internal successors, (501), 379 states have internal predecessors, (501), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 22:28:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 531 transitions. [2022-12-13 22:28:33,185 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 531 transitions. Word has length 204 [2022-12-13 22:28:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:28:33,185 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 531 transitions. [2022-12-13 22:28:33,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-13 22:28:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 531 transitions. [2022-12-13 22:28:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-12-13 22:28:33,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:28:33,188 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:28:33,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 22:28:33,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 22:28:33,389 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:28:33,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:33,390 INFO L85 PathProgramCache]: Analyzing trace with hash 729443525, now seen corresponding path program 1 times [2022-12-13 22:28:33,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:33,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517918754] [2022-12-13 22:28:33,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:33,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 22:28:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 22:28:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 22:28:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 22:28:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-12-13 22:28:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 22:28:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-12-13 22:28:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-12-13 22:28:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-12-13 22:28:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-12-13 22:28:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-12-13 22:28:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-12-13 22:28:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-12-13 22:28:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-12-13 22:28:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 314 proven. 11 refuted. 0 times theorem prover too weak. 949 trivial. 0 not checked. [2022-12-13 22:28:34,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:34,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517918754] [2022-12-13 22:28:34,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517918754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:28:34,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596784039] [2022-12-13 22:28:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:34,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:28:34,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:28:34,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:28:34,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:28:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:34,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 2014 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 22:28:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:28:35,155 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 22:28:35,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 22:28:35,222 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:28:35,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-12-13 22:28:35,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-13 22:28:35,264 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:28:35,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-12-13 22:28:35,317 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-13 22:28:35,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 22:28:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 610 proven. 24 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2022-12-13 22:28:41,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:28:41,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596784039] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:28:41,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:28:41,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 31 [2022-12-13 22:28:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767615741] [2022-12-13 22:28:41,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:28:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 22:28:41,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 22:28:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=871, Unknown=17, NotChecked=0, Total=992 [2022-12-13 22:28:41,676 INFO L87 Difference]: Start difference. First operand 394 states and 531 transitions. Second operand has 31 states, 29 states have (on average 4.379310344827586) internal successors, (127), 26 states have internal predecessors, (127), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2022-12-13 22:28:43,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:28:45,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:29:02,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:29:22,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:29:24,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:29:33,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:29:35,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:29:59,525 WARN L233 SmtUtils]: Spent 20.14s on a formula simplification. DAG size of input: 52 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:30:07,752 WARN L233 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:30:09,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:11,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:13,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:15,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:17,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:19,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:21,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:24,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:45,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:47,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:49,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:51,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:53,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:30:56,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:05,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:07,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:09,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:11,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:13,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:15,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:16,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:18,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:21,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:23,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:25,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:26,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:28,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:31,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:33,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:35,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:31:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:31:37,582 INFO L93 Difference]: Finished difference Result 771 states and 883 transitions. [2022-12-13 22:31:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 22:31:37,583 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.379310344827586) internal successors, (127), 26 states have internal predecessors, (127), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) Word has length 230 [2022-12-13 22:31:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:31:37,586 INFO L225 Difference]: With dead ends: 771 [2022-12-13 22:31:37,586 INFO L226 Difference]: Without dead ends: 771 [2022-12-13 22:31:37,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 103.5s TimeCoverageRelationStatistics Valid=448, Invalid=2918, Unknown=56, NotChecked=0, Total=3422 [2022-12-13 22:31:37,588 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 2491 mSDsluCounter, 2766 mSDsCounter, 0 mSdLazyCounter, 3725 mSolverCounterSat, 257 mSolverCounterUnsat, 53 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2491 SdHoareTripleChecker+Valid, 2939 SdHoareTripleChecker+Invalid, 4035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 3725 IncrementalHoareTripleChecker+Invalid, 53 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.8s IncrementalHoareTripleChecker+Time [2022-12-13 22:31:37,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2491 Valid, 2939 Invalid, 4035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 3725 Invalid, 53 Unknown, 0 Unchecked, 78.8s Time] [2022-12-13 22:31:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-12-13 22:31:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 431. [2022-12-13 22:31:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 290 states have (on average 1.8379310344827586) internal successors, (533), 404 states have internal predecessors, (533), 29 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (57), 28 states have call predecessors, (57), 29 states have call successors, (57) [2022-12-13 22:31:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 619 transitions. [2022-12-13 22:31:37,609 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 619 transitions. Word has length 230 [2022-12-13 22:31:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:31:37,610 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 619 transitions. [2022-12-13 22:31:37,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.379310344827586) internal successors, (127), 26 states have internal predecessors, (127), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2022-12-13 22:31:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 619 transitions. [2022-12-13 22:31:37,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-12-13 22:31:37,614 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:31:37,615 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:37,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 22:31:37,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 22:31:37,816 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:31:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:31:37,818 INFO L85 PathProgramCache]: Analyzing trace with hash -575518174, now seen corresponding path program 1 times [2022-12-13 22:31:37,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:31:37,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761238096] [2022-12-13 22:31:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:31:37,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:31:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 22:31:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 22:31:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 22:31:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 22:31:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-12-13 22:31:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-12-13 22:31:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-12-13 22:31:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-12-13 22:31:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-12-13 22:31:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-12-13 22:31:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-12-13 22:31:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-12-13 22:31:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-12-13 22:31:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-12-13 22:31:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 254 proven. 5 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-12-13 22:31:39,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:31:39,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761238096] [2022-12-13 22:31:39,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761238096] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:31:39,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824090781] [2022-12-13 22:31:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:31:39,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:31:39,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:31:39,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:31:39,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:31:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:39,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 22:31:39,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:31:40,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 22:31:40,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 22:31:40,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 22:31:40,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 22:31:40,097 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:31:40,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 22:31:40,102 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 22:31:40,116 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:31:40,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 22:31:40,121 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 22:31:40,171 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:31:40,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-12-13 22:31:40,184 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:31:40,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-12-13 22:31:40,273 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-13 22:31:40,274 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 15 treesize of output 15 [2022-12-13 22:31:40,323 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 31 treesize of output 19 [2022-12-13 22:31:40,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 26 treesize of output 14 [2022-12-13 22:31:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 267 proven. 5 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-12-13 22:31:40,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:31:40,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:31:40,581 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 66 [2022-12-13 22:31:40,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:31:40,591 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 53 [2022-12-13 22:31:40,594 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 104 treesize of output 72 [2022-12-13 22:31:40,598 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 122 treesize of output 102 [2022-12-13 22:31:40,601 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 89 treesize of output 85 [2022-12-13 22:31:40,605 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 85 treesize of output 79 [2022-12-13 22:31:40,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:31:40,612 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 88 treesize of output 86 [2022-12-13 22:31:40,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:31:40,705 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 43 treesize of output 47 [2022-12-13 22:31:40,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:31:40,924 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 2 case distinctions, treesize of input 23 treesize of output 29 [2022-12-13 22:31:40,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:31:40,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-13 22:31:40,935 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 22:31:40,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:40,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:31:40,949 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-12-13 22:31:40,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:40,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-12-13 22:31:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:40,959 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-12-13 22:31:40,959 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 1 [2022-12-13 22:31:41,200 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 22:31:41,201 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 13 treesize of output 12 [2022-12-13 22:31:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 265 proven. 7 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-12-13 22:31:41,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824090781] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:31:41,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:31:41,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 36 [2022-12-13 22:31:41,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375379299] [2022-12-13 22:31:41,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:31:41,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 22:31:41,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:31:41,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 22:31:41,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1208, Unknown=5, NotChecked=0, Total=1332 [2022-12-13 22:31:41,228 INFO L87 Difference]: Start difference. First operand 431 states and 619 transitions. Second operand has 37 states, 36 states have (on average 4.166666666666667) internal successors, (150), 34 states have internal predecessors, (150), 5 states have call successors, (42), 4 states have call predecessors, (42), 6 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2022-12-13 22:31:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:31:44,713 INFO L93 Difference]: Finished difference Result 981 states and 1107 transitions. [2022-12-13 22:31:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 22:31:44,714 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.166666666666667) internal successors, (150), 34 states have internal predecessors, (150), 5 states have call successors, (42), 4 states have call predecessors, (42), 6 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) Word has length 244 [2022-12-13 22:31:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:31:44,717 INFO L225 Difference]: With dead ends: 981 [2022-12-13 22:31:44,717 INFO L226 Difference]: Without dead ends: 981 [2022-12-13 22:31:44,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=433, Invalid=3102, Unknown=5, NotChecked=0, Total=3540 [2022-12-13 22:31:44,718 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 5294 mSDsluCounter, 1957 mSDsCounter, 0 mSdLazyCounter, 4571 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5294 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 4926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 4571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-13 22:31:44,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5294 Valid, 2078 Invalid, 4926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 4571 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-13 22:31:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-12-13 22:31:44,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 440. [2022-12-13 22:31:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 300 states have (on average 1.79) internal successors, (537), 413 states have internal predecessors, (537), 29 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (57), 28 states have call predecessors, (57), 29 states have call successors, (57) [2022-12-13 22:31:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 623 transitions. [2022-12-13 22:31:44,730 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 623 transitions. Word has length 244 [2022-12-13 22:31:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:31:44,730 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 623 transitions. [2022-12-13 22:31:44,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.166666666666667) internal successors, (150), 34 states have internal predecessors, (150), 5 states have call successors, (42), 4 states have call predecessors, (42), 6 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2022-12-13 22:31:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 623 transitions. [2022-12-13 22:31:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-12-13 22:31:44,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:31:44,733 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:44,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 22:31:44,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 22:31:44,935 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:31:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:31:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash 247572815, now seen corresponding path program 1 times [2022-12-13 22:31:44,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:31:44,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155335381] [2022-12-13 22:31:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:31:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:31:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 22:31:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 22:31:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 22:31:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 22:31:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-12-13 22:31:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-12-13 22:31:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-12-13 22:31:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-12-13 22:31:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-12-13 22:31:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-12-13 22:31:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-12-13 22:31:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-12-13 22:31:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-12-13 22:31:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-12-13 22:31:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2022-12-13 22:31:45,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:31:45,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155335381] [2022-12-13 22:31:45,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155335381] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:31:45,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:31:45,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:31:45,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66287831] [2022-12-13 22:31:45,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:31:45,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:31:45,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:31:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:31:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:31:45,334 INFO L87 Difference]: Start difference. First operand 440 states and 623 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-13 22:31:45,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:31:45,746 INFO L93 Difference]: Finished difference Result 641 states and 748 transitions. [2022-12-13 22:31:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:31:45,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 247 [2022-12-13 22:31:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:31:45,748 INFO L225 Difference]: With dead ends: 641 [2022-12-13 22:31:45,748 INFO L226 Difference]: Without dead ends: 641 [2022-12-13 22:31:45,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 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 22:31:45,748 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 631 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 22:31:45,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 672 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 22:31:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-12-13 22:31:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 435. [2022-12-13 22:31:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 300 states have (on average 1.7533333333333334) internal successors, (526), 408 states have internal predecessors, (526), 29 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (57), 28 states have call predecessors, (57), 29 states have call successors, (57) [2022-12-13 22:31:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 612 transitions. [2022-12-13 22:31:45,758 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 612 transitions. Word has length 247 [2022-12-13 22:31:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:31:45,758 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 612 transitions. [2022-12-13 22:31:45,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-13 22:31:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 612 transitions. [2022-12-13 22:31:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-12-13 22:31:45,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:31:45,760 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:45,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 22:31:45,760 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:31:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:31:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash 247572816, now seen corresponding path program 1 times [2022-12-13 22:31:45,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:31:45,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721802738] [2022-12-13 22:31:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:31:45,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:31:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 22:31:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 22:31:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 22:31:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 22:31:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-12-13 22:31:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-12-13 22:31:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-12-13 22:31:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-12-13 22:31:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-12-13 22:31:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-12-13 22:31:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:47,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-12-13 22:31:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:48,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-12-13 22:31:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:48,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-12-13 22:31:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:48,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-12-13 22:31:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 358 proven. 118 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-12-13 22:31:48,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:31:48,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721802738] [2022-12-13 22:31:48,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721802738] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:31:48,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956191518] [2022-12-13 22:31:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:31:48,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:31:48,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:31:48,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:31:48,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:31:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:49,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 2097 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 22:31:49,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:31:49,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 22:31:49,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 22:31:49,531 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:31:49,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 22:31:49,535 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 22:31:49,574 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:31:49,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-12-13 22:31:49,631 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 22:31:49,632 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 22:31:49,661 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 15 treesize of output 7 [2022-12-13 22:31:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 267 proven. 5 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-12-13 22:31:49,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:31:49,813 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 8 treesize of output 6 [2022-12-13 22:31:49,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:31:49,933 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-12-13 22:31:49,935 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 33 treesize of output 25 [2022-12-13 22:31:49,939 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 7 treesize of output 5 [2022-12-13 22:31:50,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:31:50,115 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 2 case distinctions, treesize of input 25 treesize of output 31 [2022-12-13 22:31:50,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:31:50,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-12-13 22:31:50,139 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 7 treesize of output 5 [2022-12-13 22:31:50,388 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 22:31:50,388 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 13 treesize of output 12 [2022-12-13 22:31:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 265 proven. 7 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-12-13 22:31:50,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956191518] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:31:50,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:31:50,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17, 15] total 56 [2022-12-13 22:31:50,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525164110] [2022-12-13 22:31:50,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:31:50,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-13 22:31:50,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:31:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-13 22:31:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2838, Unknown=5, NotChecked=0, Total=3080 [2022-12-13 22:31:50,415 INFO L87 Difference]: Start difference. First operand 435 states and 612 transitions. Second operand has 56 states, 53 states have (on average 3.509433962264151) internal successors, (186), 50 states have internal predecessors, (186), 8 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2022-12-13 22:31:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:31:56,078 INFO L93 Difference]: Finished difference Result 664 states and 732 transitions. [2022-12-13 22:31:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 22:31:56,078 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 3.509433962264151) internal successors, (186), 50 states have internal predecessors, (186), 8 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) Word has length 247 [2022-12-13 22:31:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:31:56,079 INFO L225 Difference]: With dead ends: 664 [2022-12-13 22:31:56,079 INFO L226 Difference]: Without dead ends: 645 [2022-12-13 22:31:56,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 495 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1174, Invalid=7377, Unknown=5, NotChecked=0, Total=8556 [2022-12-13 22:31:56,081 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 2958 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 6121 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2958 SdHoareTripleChecker+Valid, 3123 SdHoareTripleChecker+Invalid, 6377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 6121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-13 22:31:56,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2958 Valid, 3123 Invalid, 6377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 6121 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-13 22:31:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-12-13 22:31:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 402. [2022-12-13 22:31:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 283 states have (on average 1.7632508833922262) internal successors, (499), 387 states have internal predecessors, (499), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 22:31:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 529 transitions. [2022-12-13 22:31:56,090 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 529 transitions. Word has length 247 [2022-12-13 22:31:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:31:56,090 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 529 transitions. [2022-12-13 22:31:56,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 3.509433962264151) internal successors, (186), 50 states have internal predecessors, (186), 8 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2022-12-13 22:31:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 529 transitions. [2022-12-13 22:31:56,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-12-13 22:31:56,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:31:56,092 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:56,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 22:31:56,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:31:56,293 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-12-13 22:31:56,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:31:56,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2049588189, now seen corresponding path program 1 times [2022-12-13 22:31:56,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:31:56,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614330733] [2022-12-13 22:31:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:31:56,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:30,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 22:32:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:30,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 22:32:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:32,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 22:32:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:34,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 22:32:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:36,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-12-13 22:32:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:37,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-12-13 22:32:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:38,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-12-13 22:32:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:39,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-12-13 22:32:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:40,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-12-13 22:32:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:41,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-12-13 22:32:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:42,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-12-13 22:32:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:44,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-12-13 22:32:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:47,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-12-13 22:32:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:51,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2022-12-13 22:32:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:33:39,176 WARN L233 SmtUtils]: Spent 23.73s on a formula simplification that was a NOOP. DAG size: 308 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:33:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 65 proven. 870 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-12-13 22:33:55,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:33:55,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614330733] [2022-12-13 22:33:55,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614330733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:33:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921776182] [2022-12-13 22:33:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:33:55,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:33:55,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:33:55,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:33:55,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0322090e-7d5b-41a0-9b06-0137ba72eb97/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:33:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:33:56,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2167 conjuncts, 715 conjunts are in the unsatisfiable core [2022-12-13 22:33:56,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:33:56,650 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 22:33:57,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 22:33:57,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 22:33:57,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 22:33:57,471 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:33:57,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 22:33:57,478 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 22:33:57,662 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:33:57,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-12-13 22:33:57,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 22:33:57,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 22:33:57,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:33:57,907 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 25 treesize of output 24 [2022-12-13 22:33:57,920 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:33:57,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-12-13 22:33:57,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-13 22:33:57,940 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:33:57,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-12-13 22:33:57,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-13 22:33:58,204 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:33:58,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-12-13 22:33:58,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-13 22:33:58,223 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:33:58,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-12-13 22:33:58,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:33:58,576 INFO L321 Elim1Store]: treesize reduction 18, result has 30.8 percent of original size [2022-12-13 22:33:58,576 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 25 treesize of output 24 [2022-12-13 22:34:01,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,476 INFO L321 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2022-12-13 22:34:01,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 231 treesize of output 257 [2022-12-13 22:34:01,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-12-13 22:34:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2022-12-13 22:34:01,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 122 [2022-12-13 22:34:01,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,533 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 21 treesize of output 29 [2022-12-13 22:34:01,542 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 14 treesize of output 13 [2022-12-13 22:34:01,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:01,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-12-13 22:34:01,573 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-12-13 22:34:01,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-13 22:34:01,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 35 [2022-12-13 22:34:04,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:04,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:04,428 INFO L321 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-12-13 22:34:04,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 230 [2022-12-13 22:34:04,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:04,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:04,465 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-13 22:34:04,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 41 [2022-12-13 22:34:04,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:04,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:04,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:04,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:04,494 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-13 22:34:04,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 59 [2022-12-13 22:34:04,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:04,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 155 [2022-12-13 22:34:04,536 INFO L321 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2022-12-13 22:34:04,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-12-13 22:34:04,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:04,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-13 22:34:07,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,698 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-13 22:34:07,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 441 treesize of output 415 [2022-12-13 22:34:07,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,733 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-13 22:34:07,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 59 [2022-12-13 22:34:07,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,762 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-13 22:34:07,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 41 [2022-12-13 22:34:07,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 267 [2022-12-13 22:34:07,810 INFO L321 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2022-12-13 22:34:07,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-12-13 22:34:07,863 INFO L321 Elim1Store]: treesize reduction 25, result has 35.9 percent of original size [2022-12-13 22:34:07,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 55 [2022-12-13 22:34:07,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:07,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-13 22:34:11,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:11,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:11,071 INFO L321 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-12-13 22:34:11,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 224 treesize of output 258 [2022-12-13 22:34:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:11,108 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-13 22:34:11,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 41 [2022-12-13 22:34:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:11,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:11,160 INFO L321 Elim1Store]: treesize reduction 38, result has 41.5 percent of original size [2022-12-13 22:34:11,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 174 [2022-12-13 22:34:11,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:11,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 344 treesize of output 240 [2022-12-13 22:34:11,223 INFO L321 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2022-12-13 22:34:11,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-12-13 22:34:11,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-13 22:34:11,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:11,254 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 26 treesize of output 27 [2022-12-13 22:34:11,295 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 10 treesize of output 9 [2022-12-13 22:34:11,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:34:11,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 13 [2022-12-13 22:34:11,409 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 7 treesize of output 3 [2022-12-13 22:34:11,466 INFO L321 Elim1Store]: treesize reduction 25, result has 35.9 percent of original size [2022-12-13 22:34:11,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 57 [2022-12-13 22:34:14,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:14,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:14,667 INFO L321 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-12-13 22:34:14,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 474 treesize of output 480 [2022-12-13 22:34:14,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:14,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 492 treesize of output 364 [2022-12-13 22:34:14,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:14,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:14,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:14,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:14,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:14,908 INFO L321 Elim1Store]: treesize reduction 208, result has 24.9 percent of original size [2022-12-13 22:34:14,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 313 treesize of output 406 [2022-12-13 22:34:14,991 INFO L321 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2022-12-13 22:34:14,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-12-13 22:34:15,050 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-13 22:34:15,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 47 [2022-12-13 22:34:15,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-13 22:34:15,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:15,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 335 treesize of output 296 [2022-12-13 22:34:16,097 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-13 22:34:16,098 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 18 treesize of output 22 [2022-12-13 22:34:16,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-13 22:34:16,202 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-13 22:34:16,202 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 18 treesize of output 22 [2022-12-13 22:34:16,245 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-13 22:34:16,246 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 67 treesize of output 75 [2022-12-13 22:34:16,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 775 treesize of output 583 [2022-12-13 22:34:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:42,435 WARN L233 SmtUtils]: Spent 13.03s on a formula simplification. DAG size of input: 281 DAG size of output: 165 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-13 22:34:42,435 INFO L321 Elim1Store]: treesize reduction 684, result has 32.9 percent of original size [2022-12-13 22:34:42,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 46 case distinctions, treesize of input 3879 treesize of output 3379 [2022-12-13 22:34:42,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:42,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:42,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:34:42,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:35:10,751 WARN L233 SmtUtils]: Spent 28.04s on a formula simplification. DAG size of input: 964 DAG size of output: 588 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-13 22:35:10,753 INFO L321 Elim1Store]: treesize reduction 2348, result has 35.4 percent of original size [2022-12-13 22:35:10,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 18 select indices, 18 select index equivalence classes, 5 disjoint index pairs (out of 153 index pairs), introduced 20 new quantified variables, introduced 182 case distinctions, treesize of input 79109 treesize of output 75888 [2022-12-13 22:35:11,885 INFO L217 Elim1Store]: Index analysis took 382 ms [2022-12-13 22:35:11,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:35:13,358 INFO L321 Elim1Store]: treesize reduction 415, result has 26.4 percent of original size [2022-12-13 22:35:13,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 74546 treesize of output 74667 [2022-12-13 22:35:14,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:35:17,972 INFO L321 Elim1Store]: treesize reduction 1096, result has 7.0 percent of original size [2022-12-13 22:35:17,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 5 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 65 case distinctions, treesize of input 74525 treesize of output 66180 [2022-12-13 22:35:19,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:35:19,667 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 74052 treesize of output 74053 [2022-12-13 22:35:20,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:35:20,899 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 74044 treesize of output 72769 [2022-12-13 22:35:22,530 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-13 22:35:22,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 41 [2022-12-13 22:35:30,735 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 22:35:30,736 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 134 treesize of output 114