./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.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_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/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_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/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_9f582d90-9856-4949-978b-4321d3d9de7a/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 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 --- 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 19:27:39,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:27:39,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:27:39,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:27:39,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:27:39,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:27:39,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:27:39,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:27:39,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:27:39,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:27:39,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:27:39,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:27:39,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:27:39,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:27:39,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:27:39,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:27:39,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:27:39,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:27:39,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:27:39,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:27:39,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:27:39,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:27:39,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:27:39,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:27:39,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:27:39,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:27:39,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:27:39,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:27:39,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:27:39,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:27:39,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:27:39,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:27:39,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:27:39,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:27:39,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:27:39,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:27:39,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:27:39,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:27:39,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:27:39,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:27:39,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:27:39,143 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:27:39,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:27:39,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:27:39,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:27:39,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:27:39,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:27:39,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:27:39,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:27:39,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:27:39,169 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:27:39,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:27:39,169 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:27:39,169 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:27:39,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:27:39,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:27:39,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:27:39,170 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:27:39,170 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:27:39,170 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:27:39,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:27:39,171 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:27:39,171 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:27:39,171 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:27:39,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:27:39,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:27:39,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:27:39,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:27:39,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:27:39,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:27:39,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:27:39,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:27:39,173 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:27:39,173 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:27:39,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:27:39,174 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:27:39,174 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_9f582d90-9856-4949-978b-4321d3d9de7a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 [2022-12-13 19:27:39,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:27:39,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:27:39,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:27:39,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:27:39,383 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:27:39,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2022-12-13 19:27:42,009 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:27:42,227 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:27:42,228 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2022-12-13 19:27:42,238 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/data/240dc94d8/02f425e8656b4b73891e9fcbeb3e24fc/FLAG416d54fb4 [2022-12-13 19:27:42,251 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/data/240dc94d8/02f425e8656b4b73891e9fcbeb3e24fc [2022-12-13 19:27:42,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:27:42,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:27:42,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:27:42,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:27:42,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:27:42,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33964e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42, skipping insertion in model container [2022-12-13 19:27:42,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:27:42,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:27:42,557 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i[24151,24164] [2022-12-13 19:27:42,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:27:42,569 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:27:42,602 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i[24151,24164] [2022-12-13 19:27:42,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:27:42,627 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:27:42,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42 WrapperNode [2022-12-13 19:27:42,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:27:42,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:27:42,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:27:42,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:27:42,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,667 INFO L138 Inliner]: procedures = 126, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 125 [2022-12-13 19:27:42,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:27:42,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:27:42,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:27:42,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:27:42,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,693 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:27:42,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:27:42,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:27:42,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:27:42,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (1/1) ... [2022-12-13 19:27:42,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:27:42,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:27:42,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:27:42,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:27:42,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:27:42,760 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-12-13 19:27:42,760 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-12-13 19:27:42,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 19:27:42,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:27:42,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:27:42,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 19:27:42,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 19:27:42,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:27:42,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 19:27:42,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:27:42,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:27:42,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:27:42,864 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:27:42,866 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:27:43,133 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:27:43,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:27:43,140 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 19:27:43,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:27:43 BoogieIcfgContainer [2022-12-13 19:27:43,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:27:43,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:27:43,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:27:43,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:27:43,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:27:42" (1/3) ... [2022-12-13 19:27:43,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529259f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:27:43, skipping insertion in model container [2022-12-13 19:27:43,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:27:42" (2/3) ... [2022-12-13 19:27:43,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529259f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:27:43, skipping insertion in model container [2022-12-13 19:27:43,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:27:43" (3/3) ... [2022-12-13 19:27:43,151 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2022-12-13 19:27:43,168 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:27:43,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-12-13 19:27:43,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:27:43,224 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;@451a7539, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:27:43,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-12-13 19:27:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 93 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 19:27:43,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:43,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:27:43,239 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:43,245 INFO L85 PathProgramCache]: Analyzing trace with hash 894197909, now seen corresponding path program 1 times [2022-12-13 19:27:43,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:43,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491650520] [2022-12-13 19:27:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:43,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:43,447 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 19:27:43,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:43,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491650520] [2022-12-13 19:27:43,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491650520] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:27:43,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:27:43,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:27:43,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614249544] [2022-12-13 19:27:43,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:27:43,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:27:43,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:43,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:27:43,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:27:43,477 INFO L87 Difference]: Start difference. First operand has 97 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 93 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:27:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:43,566 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2022-12-13 19:27:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:27:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 19:27:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:43,573 INFO L225 Difference]: With dead ends: 95 [2022-12-13 19:27:43,573 INFO L226 Difference]: Without dead ends: 92 [2022-12-13 19:27:43,575 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 19:27:43,577 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:43,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:27:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-13 19:27:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-12-13 19:27:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 88 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-12-13 19:27:43,605 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 6 [2022-12-13 19:27:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:43,606 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-12-13 19:27:43,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:27:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-12-13 19:27:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 19:27:43,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:43,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:27:43,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:27:43,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:43,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash 894197910, now seen corresponding path program 1 times [2022-12-13 19:27:43,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:43,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795794886] [2022-12-13 19:27:43,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:43,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:43,705 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 19:27:43,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:43,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795794886] [2022-12-13 19:27:43,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795794886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:27:43,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:27:43,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:27:43,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043623496] [2022-12-13 19:27:43,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:27:43,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:27:43,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:43,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:27:43,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:27:43,708 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:27:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:43,775 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-12-13 19:27:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:27:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 19:27:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:43,777 INFO L225 Difference]: With dead ends: 90 [2022-12-13 19:27:43,777 INFO L226 Difference]: Without dead ends: 90 [2022-12-13 19:27:43,777 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 19:27:43,778 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 4 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:43,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 146 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:27:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-13 19:27:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-12-13 19:27:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:43,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-12-13 19:27:43,783 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 6 [2022-12-13 19:27:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:43,783 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-12-13 19:27:43,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:27:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-12-13 19:27:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 19:27:43,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:43,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:43,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:27:43,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:43,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1984336343, now seen corresponding path program 1 times [2022-12-13 19:27:43,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:43,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618602438] [2022-12-13 19:27:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:43,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:43,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:43,876 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 19:27:43,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:43,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618602438] [2022-12-13 19:27:43,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618602438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:27:43,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:27:43,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:27:43,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23379290] [2022-12-13 19:27:43,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:27:43,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:27:43,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:43,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:27:43,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:27:43,880 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 19:27:43,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:43,964 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2022-12-13 19:27:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:27:43,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-12-13 19:27:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:43,966 INFO L225 Difference]: With dead ends: 97 [2022-12-13 19:27:43,966 INFO L226 Difference]: Without dead ends: 97 [2022-12-13 19:27:43,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:27:43,967 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 5 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:43,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 216 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:27:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-13 19:27:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2022-12-13 19:27:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.84) internal successors, (92), 87 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-12-13 19:27:43,976 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 13 [2022-12-13 19:27:43,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:43,976 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-12-13 19:27:43,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 19:27:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-12-13 19:27:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 19:27:43,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:43,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:43,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:27:43,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:43,978 INFO L85 PathProgramCache]: Analyzing trace with hash 305697820, now seen corresponding path program 1 times [2022-12-13 19:27:43,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:43,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101566227] [2022-12-13 19:27:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:43,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:44,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:44,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:27:44,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:44,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101566227] [2022-12-13 19:27:44,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101566227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:27:44,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:27:44,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 19:27:44,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332299356] [2022-12-13 19:27:44,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:27:44,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:27:44,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:27:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:27:44,159 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:27:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:44,357 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2022-12-13 19:27:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:27:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-12-13 19:27:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:44,360 INFO L225 Difference]: With dead ends: 144 [2022-12-13 19:27:44,360 INFO L226 Difference]: Without dead ends: 144 [2022-12-13 19:27:44,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:27:44,362 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 67 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:44,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 277 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:27:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-12-13 19:27:44,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2022-12-13 19:27:44,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 50 states have (on average 1.82) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-12-13 19:27:44,366 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 22 [2022-12-13 19:27:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:44,366 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-12-13 19:27:44,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:27:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-12-13 19:27:44,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 19:27:44,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:44,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:44,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:27:44,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:44,368 INFO L85 PathProgramCache]: Analyzing trace with hash 305697821, now seen corresponding path program 1 times [2022-12-13 19:27:44,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:44,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141385146] [2022-12-13 19:27:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:44,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:44,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:44,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:27:44,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:44,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141385146] [2022-12-13 19:27:44,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141385146] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:27:44,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:27:44,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 19:27:44,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077712184] [2022-12-13 19:27:44,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:27:44,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:27:44,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:44,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:27:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:27:44,558 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:27:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:44,702 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-12-13 19:27:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:27:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-12-13 19:27:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:44,704 INFO L225 Difference]: With dead ends: 90 [2022-12-13 19:27:44,704 INFO L226 Difference]: Without dead ends: 90 [2022-12-13 19:27:44,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:27:44,705 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 81 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:44,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 256 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:27:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-13 19:27:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-12-13 19:27:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 50 states have (on average 1.8) internal successors, (90), 85 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-12-13 19:27:44,711 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 22 [2022-12-13 19:27:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:44,711 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-12-13 19:27:44,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:27:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-12-13 19:27:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 19:27:44,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:44,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 19:27:44,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:44,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1713076933, now seen corresponding path program 1 times [2022-12-13 19:27:44,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:44,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160724686] [2022-12-13 19:27:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:44,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:44,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:27:44,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160724686] [2022-12-13 19:27:44,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160724686] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:44,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121842744] [2022-12-13 19:27:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:44,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:27:44,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:27:44,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:27:44,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:27:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:27:45,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:27:45,100 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 19:27:45,153 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_256 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_256))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-12-13 19:27:45,225 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 19:27:45,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 19:27:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-12-13 19:27:45,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:27:45,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121842744] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:45,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:27:45,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-12-13 19:27:45,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925020379] [2022-12-13 19:27:45,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:27:45,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 19:27:45,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 19:27:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2022-12-13 19:27:45,300 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 19:27:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:45,546 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2022-12-13 19:27:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:27:45,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-12-13 19:27:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:45,547 INFO L225 Difference]: With dead ends: 141 [2022-12-13 19:27:45,547 INFO L226 Difference]: Without dead ends: 141 [2022-12-13 19:27:45,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2022-12-13 19:27:45,548 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 62 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:45,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 353 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-12-13 19:27:45,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-13 19:27:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 88. [2022-12-13 19:27:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.78) internal successors, (89), 84 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-12-13 19:27:45,554 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 25 [2022-12-13 19:27:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:45,555 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-12-13 19:27:45,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 19:27:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-12-13 19:27:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 19:27:45,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:45,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:45,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:27:45,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:27:45,758 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1713076934, now seen corresponding path program 1 times [2022-12-13 19:27:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:45,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885484824] [2022-12-13 19:27:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:46,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:46,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:27:46,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885484824] [2022-12-13 19:27:46,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885484824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027142737] [2022-12-13 19:27:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:46,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:27:46,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:27:46,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:27:46,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:27:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:46,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:27:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:27:46,261 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 19:27:46,407 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_361 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_361))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-12-13 19:27:46,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:27:46,459 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 14 treesize of output 16 [2022-12-13 19:27:46,468 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 19:27:46,469 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 19:27:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-13 19:27:46,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:27:46,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027142737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:46,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:27:46,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2022-12-13 19:27:46,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338465846] [2022-12-13 19:27:46,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:27:46,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 19:27:46,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:46,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 19:27:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=323, Unknown=1, NotChecked=36, Total=420 [2022-12-13 19:27:46,622 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 19:27:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:47,078 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2022-12-13 19:27:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:27:47,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-12-13 19:27:47,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:47,080 INFO L225 Difference]: With dead ends: 141 [2022-12-13 19:27:47,081 INFO L226 Difference]: Without dead ends: 141 [2022-12-13 19:27:47,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=386, Unknown=1, NotChecked=40, Total=506 [2022-12-13 19:27:47,082 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 135 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:47,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 406 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 673 Invalid, 0 Unknown, 145 Unchecked, 0.4s Time] [2022-12-13 19:27:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-13 19:27:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2022-12-13 19:27:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 50 states have (on average 1.76) internal successors, (88), 83 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2022-12-13 19:27:47,086 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 25 [2022-12-13 19:27:47,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:47,087 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2022-12-13 19:27:47,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 19:27:47,087 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2022-12-13 19:27:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 19:27:47,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:47,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:47,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 19:27:47,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 19:27:47,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1566263260, now seen corresponding path program 1 times [2022-12-13 19:27:47,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:47,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312603849] [2022-12-13 19:27:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:47,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 19:27:47,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:47,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312603849] [2022-12-13 19:27:47,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312603849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:47,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830052100] [2022-12-13 19:27:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:47,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:27:47,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:27:47,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:27:47,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:27:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:47,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:27:47,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:27:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 19:27:47,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:27:47,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830052100] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:27:47,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:27:47,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-12-13 19:27:47,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451028661] [2022-12-13 19:27:47,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:27:47,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:27:47,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:27:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:27:47,500 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:27:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:47,511 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2022-12-13 19:27:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:27:47,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-12-13 19:27:47,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:47,512 INFO L225 Difference]: With dead ends: 146 [2022-12-13 19:27:47,512 INFO L226 Difference]: Without dead ends: 146 [2022-12-13 19:27:47,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:27:47,513 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 132 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:47,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 181 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:27:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-13 19:27:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2022-12-13 19:27:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 84 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-12-13 19:27:47,518 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 29 [2022-12-13 19:27:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:47,519 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-12-13 19:27:47,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:27:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-12-13 19:27:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 19:27:47,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:47,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:47,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:27:47,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:27:47,721 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1566263288, now seen corresponding path program 1 times [2022-12-13 19:27:47,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:47,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359631038] [2022-12-13 19:27:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:47,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:47,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:47,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:27:47,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:47,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359631038] [2022-12-13 19:27:47,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359631038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542876758] [2022-12-13 19:27:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:47,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:27:47,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:27:47,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:27:47,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:27:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:48,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 19:27:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:27:48,087 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 19:27:48,104 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 19:27:48,167 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-12-13 19:27:48,167 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 19 treesize of output 16 [2022-12-13 19:27:48,196 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 19:27:48,205 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_591 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_591))))) is different from true [2022-12-13 19:27:48,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:27:48,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 19:27:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-12-13 19:27:48,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:27:48,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542876758] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:48,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:27:48,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2022-12-13 19:27:48,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826379462] [2022-12-13 19:27:48,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:27:48,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:27:48,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:48,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:27:48,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=187, Unknown=1, NotChecked=28, Total=272 [2022-12-13 19:27:48,311 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 19:27:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:48,568 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2022-12-13 19:27:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:27:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-12-13 19:27:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:48,569 INFO L225 Difference]: With dead ends: 125 [2022-12-13 19:27:48,569 INFO L226 Difference]: Without dead ends: 125 [2022-12-13 19:27:48,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=299, Unknown=1, NotChecked=36, Total=420 [2022-12-13 19:27:48,570 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 195 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:48,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 242 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 335 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-12-13 19:27:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-13 19:27:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2022-12-13 19:27:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 81 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2022-12-13 19:27:48,575 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 29 [2022-12-13 19:27:48,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:48,575 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2022-12-13 19:27:48,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 19:27:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2022-12-13 19:27:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 19:27:48,575 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:48,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:48,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:27:48,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:27:48,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:48,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1566263287, now seen corresponding path program 1 times [2022-12-13 19:27:48,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:48,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487375318] [2022-12-13 19:27:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:48,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:49,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:49,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 19:27:49,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487375318] [2022-12-13 19:27:49,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487375318] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16598096] [2022-12-13 19:27:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:49,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:27:49,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:27:49,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:27:49,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:27:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:49,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 19:27:49,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:27:49,256 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 19:27:49,276 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 19:27:49,289 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_708 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_708) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-12-13 19:27:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:27:49,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 19:27:49,345 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 19:27:49,353 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_709 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_709) |c_#length|)))) is different from true [2022-12-13 19:27:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:27:49,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 19:27:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-12-13 19:27:49,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:27:49,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16598096] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:49,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:27:49,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2022-12-13 19:27:49,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857433645] [2022-12-13 19:27:49,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:27:49,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:27:49,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:49,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:27:49,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=188, Unknown=2, NotChecked=58, Total=306 [2022-12-13 19:27:49,552 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 19:27:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:49,740 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-12-13 19:27:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:27:49,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-12-13 19:27:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:49,741 INFO L225 Difference]: With dead ends: 77 [2022-12-13 19:27:49,741 INFO L226 Difference]: Without dead ends: 77 [2022-12-13 19:27:49,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=230, Unknown=2, NotChecked=66, Total=380 [2022-12-13 19:27:49,742 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 181 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:49,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 180 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-12-13 19:27:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-13 19:27:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-12-13 19:27:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.5) internal successors, (78), 73 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2022-12-13 19:27:49,746 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 29 [2022-12-13 19:27:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:49,746 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2022-12-13 19:27:49,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 19:27:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2022-12-13 19:27:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 19:27:49,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:49,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:49,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 19:27:49,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 19:27:49,949 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1940465843, now seen corresponding path program 1 times [2022-12-13 19:27:49,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:49,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201356974] [2022-12-13 19:27:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:49,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:50,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:27:50,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:50,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201356974] [2022-12-13 19:27:50,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201356974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:27:50,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:27:50,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 19:27:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520756456] [2022-12-13 19:27:50,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:27:50,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:27:50,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:27:50,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:27:50,196 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:27:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:50,520 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2022-12-13 19:27:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:27:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-12-13 19:27:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:50,522 INFO L225 Difference]: With dead ends: 111 [2022-12-13 19:27:50,522 INFO L226 Difference]: Without dead ends: 111 [2022-12-13 19:27:50,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-13 19:27:50,522 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 262 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:50,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 329 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:27:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-13 19:27:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2022-12-13 19:27:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.462962962962963) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-12-13 19:27:50,525 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 31 [2022-12-13 19:27:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:50,525 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-12-13 19:27:50,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:27:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-12-13 19:27:50,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 19:27:50,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:50,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:50,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 19:27:50,526 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:50,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1940465842, now seen corresponding path program 1 times [2022-12-13 19:27:50,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:50,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727089807] [2022-12-13 19:27:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:50,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:50,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:50,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:27:50,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:50,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727089807] [2022-12-13 19:27:50,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727089807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:27:50,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:27:50,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 19:27:50,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167031565] [2022-12-13 19:27:50,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:27:50,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:27:50,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:50,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:27:50,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:27:50,863 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:27:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:51,267 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2022-12-13 19:27:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:27:51,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-12-13 19:27:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:51,269 INFO L225 Difference]: With dead ends: 162 [2022-12-13 19:27:51,269 INFO L226 Difference]: Without dead ends: 162 [2022-12-13 19:27:51,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:27:51,270 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 666 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:51,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 324 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 19:27:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-12-13 19:27:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 89. [2022-12-13 19:27:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 85 states have internal predecessors, (97), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:27:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2022-12-13 19:27:51,274 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 31 [2022-12-13 19:27:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:51,275 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2022-12-13 19:27:51,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:27:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2022-12-13 19:27:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 19:27:51,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:51,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:51,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 19:27:51,275 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:51,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash 533076568, now seen corresponding path program 1 times [2022-12-13 19:27:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:51,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853427539] [2022-12-13 19:27:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:51,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:51,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:51,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:27:51,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:51,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853427539] [2022-12-13 19:27:51,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853427539] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:51,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902884554] [2022-12-13 19:27:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:51,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:27:51,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:27:51,662 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:27:51,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:27:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:51,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 19:27:51,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:27:51,784 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 19:27:51,863 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 19:27:51,863 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 19:27:51,919 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 19:27:51,983 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 19:27:51,983 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 19:27:52,106 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 45 treesize of output 33 [2022-12-13 19:27:52,225 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-12-13 19:27:52,226 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-12-13 19:27:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:27:52,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:27:52,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-12-13 19:27:52,355 INFO L321 Elim1Store]: treesize reduction 5, result has 77.3 percent of original size [2022-12-13 19:27:52,355 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 26 treesize of output 25 [2022-12-13 19:27:52,362 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_968 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_968))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse0)) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse1 .cse0) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) is different from false [2022-12-13 19:27:52,376 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_968 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_968))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (select (select .cse0 .cse1) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) (not (= .cse1 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)))))) is different from false [2022-12-13 19:27:52,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:52,385 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 53 treesize of output 37 [2022-12-13 19:27:52,413 INFO L321 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-12-13 19:27:52,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 131 [2022-12-13 19:27:52,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:52,425 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 104 treesize of output 100 [2022-12-13 19:27:52,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902884554] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:52,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:27:52,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 34 [2022-12-13 19:27:52,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473074869] [2022-12-13 19:27:52,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:27:52,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 19:27:52,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:52,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 19:27:52,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1307, Unknown=2, NotChecked=146, Total=1560 [2022-12-13 19:27:52,722 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 35 states, 33 states have (on average 1.606060606060606) internal successors, (53), 29 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 19:27:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:27:54,065 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2022-12-13 19:27:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 19:27:54,066 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.606060606060606) internal successors, (53), 29 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-12-13 19:27:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:27:54,067 INFO L225 Difference]: With dead ends: 175 [2022-12-13 19:27:54,067 INFO L226 Difference]: Without dead ends: 175 [2022-12-13 19:27:54,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=342, Invalid=2420, Unknown=2, NotChecked=206, Total=2970 [2022-12-13 19:27:54,069 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 894 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 19:27:54,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 759 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 19:27:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-13 19:27:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 106. [2022-12-13 19:27:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 101 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 19:27:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2022-12-13 19:27:54,074 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 36 [2022-12-13 19:27:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:27:54,074 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2022-12-13 19:27:54,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.606060606060606) internal successors, (53), 29 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 19:27:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2022-12-13 19:27:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 19:27:54,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:27:54,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:27:54,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:27:54,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 19:27:54,276 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:27:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:27:54,277 INFO L85 PathProgramCache]: Analyzing trace with hash 533076569, now seen corresponding path program 1 times [2022-12-13 19:27:54,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:27:54,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289838484] [2022-12-13 19:27:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:54,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:27:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:54,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:27:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:54,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:27:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:27:55,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:27:55,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289838484] [2022-12-13 19:27:55,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289838484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:55,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946848116] [2022-12-13 19:27:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:27:55,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:27:55,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:27:55,019 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:27:55,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:27:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:27:55,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-13 19:27:55,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:27:55,143 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 19:27:55,371 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 19:27:55,372 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 19:27:55,458 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 19:27:55,462 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 19:27:55,548 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 19:27:55,548 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-12-13 19:27:55,552 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 18 treesize of output 20 [2022-12-13 19:27:55,944 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-12-13 19:27:55,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 41 [2022-12-13 19:27:55,952 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 19:27:55,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-12-13 19:27:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:27:56,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:27:56,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:56,527 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 148 treesize of output 152 [2022-12-13 19:27:56,611 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_4) v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse0)) (forall ((v_prenex_3 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_3))) (let ((.cse2 (select (select .cse1 v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (< (select (select .cse1 .cse0) .cse2) 1) (not (<= 0 .cse2)) (not (= .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1087 (Array Int Int)) (v_ArrVal_1086 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1087))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1086) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (<= 0 (select (select .cse3 .cse4) .cse5)) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset| .cse5)) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse4)) (not (<= 0 .cse5)))))) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_4))) (let ((.cse6 (select (select .cse7 v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse6)) (forall ((v_prenex_3 (Array Int Int))) (let ((.cse8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_3) v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse7 .cse6) .cse8)) (not (<= 0 .cse8)) (not (= .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))))))) is different from false [2022-12-13 19:27:56,692 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1087 (Array Int Int)) (v_ArrVal_1086 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1087))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1086) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (<= 0 (select (select .cse0 .cse1) .cse2)) (not (= .cse2 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (not (= |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base| .cse1)) (not (<= 0 .cse2)))))) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_4) v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base| .cse3)) (forall ((v_prenex_3 (Array Int Int))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_3))) (let ((.cse4 (select (select .cse5 v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse4 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (< (select (select .cse5 .cse3) .cse4) 1) (not (<= 0 .cse4))))))))) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_4))) (let ((.cse8 (select (select .cse7 v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_prenex_3 (Array Int Int))) (let ((.cse6 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_3) v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse6 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse7 .cse8) .cse6)) (not (<= 0 .cse6))))) (not (= |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base| .cse8))))))) is different from false [2022-12-13 19:27:56,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:56,717 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 68 treesize of output 52 [2022-12-13 19:27:56,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:56,724 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 71 treesize of output 55 [2022-12-13 19:27:56,767 INFO L321 Elim1Store]: treesize reduction 21, result has 73.1 percent of original size [2022-12-13 19:27:56,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 132 treesize of output 148 [2022-12-13 19:27:56,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:56,782 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 210 treesize of output 193 [2022-12-13 19:27:56,791 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 178 treesize of output 166 [2022-12-13 19:27:56,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:56,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 142 [2022-12-13 19:27:57,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:57,357 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 68 treesize of output 60 [2022-12-13 19:27:57,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:57,364 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 79 treesize of output 55 [2022-12-13 19:27:57,374 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 19:27:57,374 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 82 treesize of output 70 [2022-12-13 19:27:57,380 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 44 treesize of output 40 [2022-12-13 19:27:57,489 INFO L321 Elim1Store]: treesize reduction 61, result has 64.1 percent of original size [2022-12-13 19:27:57,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 198 treesize of output 262 [2022-12-13 19:27:57,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:57,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 207 [2022-12-13 19:27:58,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:58,002 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 68 treesize of output 60 [2022-12-13 19:27:58,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:58,009 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 79 treesize of output 55 [2022-12-13 19:27:58,021 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 19:27:58,021 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 82 treesize of output 77 [2022-12-13 19:27:58,158 INFO L321 Elim1Store]: treesize reduction 67, result has 64.0 percent of original size [2022-12-13 19:27:58,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 210 treesize of output 280 [2022-12-13 19:27:58,179 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 144 treesize of output 124 [2022-12-13 19:27:58,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:27:58,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 207 [2022-12-13 19:27:58,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946848116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:27:58,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:27:58,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2022-12-13 19:27:58,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590277369] [2022-12-13 19:27:58,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:27:58,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 19:27:58,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:27:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 19:27:58,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2816, Unknown=2, NotChecked=214, Total=3192 [2022-12-13 19:27:58,817 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 19:28:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:28:01,882 INFO L93 Difference]: Finished difference Result 242 states and 266 transitions. [2022-12-13 19:28:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 19:28:01,882 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-12-13 19:28:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:28:01,884 INFO L225 Difference]: With dead ends: 242 [2022-12-13 19:28:01,884 INFO L226 Difference]: Without dead ends: 242 [2022-12-13 19:28:01,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=458, Invalid=5098, Unknown=2, NotChecked=294, Total=5852 [2022-12-13 19:28:01,885 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1822 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1823 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:28:01,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1823 Valid, 1673 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 19:28:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-12-13 19:28:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 105. [2022-12-13 19:28:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 100 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 19:28:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2022-12-13 19:28:01,889 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 36 [2022-12-13 19:28:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:28:01,889 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2022-12-13 19:28:01,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 19:28:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2022-12-13 19:28:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 19:28:01,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:28:01,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:28:01,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:28:02,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 19:28:02,091 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:28:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:28:02,092 INFO L85 PathProgramCache]: Analyzing trace with hash -656124647, now seen corresponding path program 1 times [2022-12-13 19:28:02,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:28:02,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904813770] [2022-12-13 19:28:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:28:02,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:28:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:02,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:28:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:02,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:28:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:28:02,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:28:02,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904813770] [2022-12-13 19:28:02,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904813770] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:28:02,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:28:02,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 19:28:02,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154655322] [2022-12-13 19:28:02,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:28:02,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:28:02,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:28:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:28:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:28:02,280 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:28:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:28:02,518 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2022-12-13 19:28:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 19:28:02,519 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-12-13 19:28:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:28:02,519 INFO L225 Difference]: With dead ends: 164 [2022-12-13 19:28:02,519 INFO L226 Difference]: Without dead ends: 164 [2022-12-13 19:28:02,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:28:02,520 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 453 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:28:02,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 401 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:28:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-13 19:28:02,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 122. [2022-12-13 19:28:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 117 states have internal predecessors, (141), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 19:28:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2022-12-13 19:28:02,523 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 37 [2022-12-13 19:28:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:28:02,524 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2022-12-13 19:28:02,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:28:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2022-12-13 19:28:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 19:28:02,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:28:02,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:28:02,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 19:28:02,525 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:28:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:28:02,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1135403477, now seen corresponding path program 1 times [2022-12-13 19:28:02,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:28:02,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061887756] [2022-12-13 19:28:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:28:02,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:28:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:02,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:28:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:02,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:28:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 19:28:02,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:28:02,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061887756] [2022-12-13 19:28:02,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061887756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:28:02,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:28:02,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 19:28:02,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348899833] [2022-12-13 19:28:02,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:28:02,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:28:02,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:28:02,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:28:02,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:28:02,601 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:28:02,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:28:02,696 INFO L93 Difference]: Finished difference Result 159 states and 193 transitions. [2022-12-13 19:28:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:28:02,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-12-13 19:28:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:28:02,697 INFO L225 Difference]: With dead ends: 159 [2022-12-13 19:28:02,697 INFO L226 Difference]: Without dead ends: 159 [2022-12-13 19:28:02,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:28:02,698 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 15 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:28:02,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 247 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:28:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-13 19:28:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2022-12-13 19:28:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 111 states have (on average 1.4504504504504505) internal successors, (161), 130 states have internal predecessors, (161), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 19:28:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 167 transitions. [2022-12-13 19:28:02,702 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 167 transitions. Word has length 38 [2022-12-13 19:28:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:28:02,702 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 167 transitions. [2022-12-13 19:28:02,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:28:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 167 transitions. [2022-12-13 19:28:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 19:28:02,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:28:02,702 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:28:02,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 19:28:02,703 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:28:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:28:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1134972528, now seen corresponding path program 1 times [2022-12-13 19:28:02,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:28:02,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137816503] [2022-12-13 19:28:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:28:02,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:28:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:02,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:28:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:02,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:28:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:28:02,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:28:02,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137816503] [2022-12-13 19:28:02,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137816503] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:28:02,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:28:02,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 19:28:02,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801373864] [2022-12-13 19:28:02,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:28:02,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:28:02,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:28:02,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:28:02,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:28:02,867 INFO L87 Difference]: Start difference. First operand 135 states and 167 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:28:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:28:03,117 INFO L93 Difference]: Finished difference Result 174 states and 209 transitions. [2022-12-13 19:28:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:28:03,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-12-13 19:28:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:28:03,118 INFO L225 Difference]: With dead ends: 174 [2022-12-13 19:28:03,118 INFO L226 Difference]: Without dead ends: 174 [2022-12-13 19:28:03,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-12-13 19:28:03,119 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 388 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:28:03,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 337 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:28:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-13 19:28:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 147. [2022-12-13 19:28:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 123 states have (on average 1.4471544715447155) internal successors, (178), 142 states have internal predecessors, (178), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 19:28:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 184 transitions. [2022-12-13 19:28:03,122 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 184 transitions. Word has length 38 [2022-12-13 19:28:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:28:03,123 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 184 transitions. [2022-12-13 19:28:03,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:28:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 184 transitions. [2022-12-13 19:28:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 19:28:03,123 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:28:03,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:28:03,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 19:28:03,124 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:28:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:28:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash 824410107, now seen corresponding path program 1 times [2022-12-13 19:28:03,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:28:03,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570054598] [2022-12-13 19:28:03,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:28:03,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:28:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:03,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:28:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:03,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:28:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 19:28:03,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:28:03,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570054598] [2022-12-13 19:28:03,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570054598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:28:03,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:28:03,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 19:28:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733359868] [2022-12-13 19:28:03,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:28:03,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:28:03,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:28:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:28:03,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:28:03,204 INFO L87 Difference]: Start difference. First operand 147 states and 184 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:28:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:28:03,301 INFO L93 Difference]: Finished difference Result 171 states and 208 transitions. [2022-12-13 19:28:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:28:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-12-13 19:28:03,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:28:03,302 INFO L225 Difference]: With dead ends: 171 [2022-12-13 19:28:03,302 INFO L226 Difference]: Without dead ends: 171 [2022-12-13 19:28:03,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:28:03,303 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:28:03,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 225 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:28:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-13 19:28:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 146. [2022-12-13 19:28:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 123 states have (on average 1.4308943089430894) internal successors, (176), 141 states have internal predecessors, (176), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 19:28:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2022-12-13 19:28:03,305 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 39 [2022-12-13 19:28:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:28:03,305 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2022-12-13 19:28:03,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:28:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2022-12-13 19:28:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 19:28:03,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:28:03,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:28:03,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 19:28:03,306 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:28:03,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:28:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash -213090349, now seen corresponding path program 1 times [2022-12-13 19:28:03,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:28:03,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618341296] [2022-12-13 19:28:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:28:03,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:28:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:03,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:28:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:03,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:28:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:28:03,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:28:03,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618341296] [2022-12-13 19:28:03,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618341296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:28:03,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121605773] [2022-12-13 19:28:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:28:03,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:28:03,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:28:03,493 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:28:03,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:28:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:03,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:28:03,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:28:03,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:28:03,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 19:28:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 19:28:03,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:28:03,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121605773] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:28:03,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:28:03,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-12-13 19:28:03,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914341938] [2022-12-13 19:28:03,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:28:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:28:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:28:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:28:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:28:03,679 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:28:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:28:03,766 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2022-12-13 19:28:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:28:03,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-12-13 19:28:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:28:03,767 INFO L225 Difference]: With dead ends: 145 [2022-12-13 19:28:03,767 INFO L226 Difference]: Without dead ends: 145 [2022-12-13 19:28:03,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:28:03,768 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 133 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:28:03,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 116 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:28:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-13 19:28:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-12-13 19:28:03,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 123 states have (on average 1.4146341463414633) internal successors, (174), 140 states have internal predecessors, (174), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 19:28:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2022-12-13 19:28:03,771 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 40 [2022-12-13 19:28:03,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:28:03,771 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2022-12-13 19:28:03,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:28:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2022-12-13 19:28:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 19:28:03,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:28:03,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:28:03,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:28:03,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:28:03,973 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 19:28:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:28:03,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1053948371, now seen corresponding path program 2 times [2022-12-13 19:28:03,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:28:03,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579022399] [2022-12-13 19:28:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:28:03,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:28:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:04,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:28:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:04,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:28:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:28:04,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:28:04,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579022399] [2022-12-13 19:28:04,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579022399] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:28:04,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185965763] [2022-12-13 19:28:04,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:28:04,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:28:04,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:28:04,543 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:28:04,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f582d90-9856-4949-978b-4321d3d9de7a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:28:04,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:28:04,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:28:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-13 19:28:04,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:28:04,666 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 19:28:04,853 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 19:28:04,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 19:28:04,965 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 19:28:04,969 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 19:28:05,103 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 19:28:05,104 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2022-12-13 19:28:05,110 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 18 treesize of output 20 [2022-12-13 19:28:05,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:28:05,515 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 19:28:05,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 27 [2022-12-13 19:28:05,681 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-12-13 19:28:05,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 31 [2022-12-13 19:28:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:28:05,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:28:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:28:07,122 INFO L321 Elim1Store]: treesize reduction 1806, result has 40.5 percent of original size [2022-12-13 19:28:07,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 78 case distinctions, treesize of input 27138 treesize of output 22726 [2022-12-13 19:28:08,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:28:08,428 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 21297 treesize of output 19009 [2022-12-13 19:28:08,874 INFO L321 Elim1Store]: treesize reduction 147, result has 52.0 percent of original size [2022-12-13 19:28:08,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 25116 treesize of output 22918 [2022-12-13 19:28:09,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:28:09,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22731 treesize of output 21971