./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a --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 cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 --- 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-b5237d8 [2022-11-21 16:52:31,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:52:31,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:52:31,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:52:31,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:52:31,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:52:31,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:52:31,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:52:31,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:52:31,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:52:31,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:52:31,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:52:31,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:52:31,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:52:31,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:52:31,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:52:31,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:52:31,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:52:31,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:52:31,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:52:31,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:52:31,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:52:31,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:52:31,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:52:31,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:52:31,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:52:31,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:52:31,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:52:31,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:52:31,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:52:31,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:52:31,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:52:31,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:52:31,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:52:31,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:52:31,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:52:31,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:52:31,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:52:31,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:52:31,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:52:31,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:52:31,287 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 16:52:31,329 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:52:31,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:52:31,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:52:31,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:52:31,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:52:31,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:52:31,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:52:31,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:52:31,332 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:52:31,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:52:31,333 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:52:31,334 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:52:31,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:52:31,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:52:31,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:52:31,334 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:52:31,335 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:52:31,335 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:52:31,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:52:31,335 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:52:31,335 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:52:31,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:52:31,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:52:31,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:52:31,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:52:31,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:52:31,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:52:31,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:52:31,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:52:31,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:52:31,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 [2022-11-21 16:52:31,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:52:31,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:52:31,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:52:31,730 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:52:31,731 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:52:31,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2022-11-21 16:52:34,952 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:52:35,297 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:52:35,298 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2022-11-21 16:52:35,310 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/data/93c9daca1/6f47871aad7148db979e17b4e86b3d21/FLAG5c373a4d4 [2022-11-21 16:52:35,326 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/data/93c9daca1/6f47871aad7148db979e17b4e86b3d21 [2022-11-21 16:52:35,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:52:35,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:52:35,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:52:35,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:52:35,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:52:35,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e7f322e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35, skipping insertion in model container [2022-11-21 16:52:35,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:52:35,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:52:35,759 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_8dfcc5cd-a120-4736-bfaf-7ac49994438f/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i[24473,24486] [2022-11-21 16:52:35,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:52:35,772 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:52:35,809 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_8dfcc5cd-a120-4736-bfaf-7ac49994438f/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i[24473,24486] [2022-11-21 16:52:35,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:52:35,836 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:52:35,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35 WrapperNode [2022-11-21 16:52:35,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:52:35,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:52:35,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:52:35,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:52:35,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,893 INFO L138 Inliner]: procedures = 126, calls = 27, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 114 [2022-11-21 16:52:35,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:52:35,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:52:35,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:52:35,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:52:35,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,956 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:52:35,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:52:35,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:52:35,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:52:35,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (1/1) ... [2022-11-21 16:52:35,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:52:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:36,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:52:36,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:52:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-21 16:52:36,068 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-21 16:52:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:52:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:52:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:52:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:52:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 16:52:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 16:52:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:52:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:52:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:52:36,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:52:36,258 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:52:36,261 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:52:36,302 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-21 16:52:36,585 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:52:36,592 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:52:36,592 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-21 16:52:36,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:52:36 BoogieIcfgContainer [2022-11-21 16:52:36,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:52:36,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:52:36,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:52:36,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:52:36,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:52:35" (1/3) ... [2022-11-21 16:52:36,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301d7d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:52:36, skipping insertion in model container [2022-11-21 16:52:36,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:52:35" (2/3) ... [2022-11-21 16:52:36,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301d7d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:52:36, skipping insertion in model container [2022-11-21 16:52:36,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:52:36" (3/3) ... [2022-11-21 16:52:36,617 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2022-11-21 16:52:36,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:52:36,639 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-11-21 16:52:36,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:52:36,718 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=FINITE_AUTOMATA, 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;@503d2b1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:52:36,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-21 16:52:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 65 states have internal predecessors, (80), 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) [2022-11-21 16:52:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-21 16:52:36,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:36,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-21 16:52:36,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash 33471376, now seen corresponding path program 1 times [2022-11-21 16:52:36,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:36,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198138608] [2022-11-21 16:52:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:36,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:37,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:37,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198138608] [2022-11-21 16:52:37,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198138608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:37,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:37,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:52:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011700639] [2022-11-21 16:52:37,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:37,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:52:37,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:52:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:52:37,116 INFO L87 Difference]: Start difference. First operand has 67 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 65 states have internal predecessors, (80), 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:37,274 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2022-11-21 16:52:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:52:37,278 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-21 16:52:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:37,287 INFO L225 Difference]: With dead ends: 111 [2022-11-21 16:52:37,288 INFO L226 Difference]: Without dead ends: 104 [2022-11-21 16:52:37,292 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 [2022-11-21 16:52:37,295 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 63 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:37,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 136 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:52:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-21 16:52:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2022-11-21 16:52:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-11-21 16:52:37,343 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 5 [2022-11-21 16:52:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:37,344 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-11-21 16:52:37,344 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-11-21 16:52:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-21 16:52:37,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:37,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-21 16:52:37,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:52:37,346 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:37,347 INFO L85 PathProgramCache]: Analyzing trace with hash 33471377, now seen corresponding path program 1 times [2022-11-21 16:52:37,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:37,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659175799] [2022-11-21 16:52:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:37,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:37,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:37,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659175799] [2022-11-21 16:52:37,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659175799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:37,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:37,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:52:37,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008588514] [2022-11-21 16:52:37,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:37,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:52:37,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:37,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:52:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:52:37,450 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:37,533 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-11-21 16:52:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:52:37,534 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-21 16:52:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:37,535 INFO L225 Difference]: With dead ends: 101 [2022-11-21 16:52:37,536 INFO L226 Difference]: Without dead ends: 101 [2022-11-21 16:52:37,536 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 [2022-11-21 16:52:37,537 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 58 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:37,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 133 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:52:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-21 16:52:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 56. [2022-11-21 16:52:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-11-21 16:52:37,545 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 5 [2022-11-21 16:52:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:37,545 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-11-21 16:52:37,545 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,545 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-11-21 16:52:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:52:37,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:37,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:37,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:52:37,549 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash 678997037, now seen corresponding path program 1 times [2022-11-21 16:52:37,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:37,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640863302] [2022-11-21 16:52:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:37,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:37,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:37,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640863302] [2022-11-21 16:52:37,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640863302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:37,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:37,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:52:37,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582049840] [2022-11-21 16:52:37,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:37,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:52:37,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:52:37,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:52:37,658 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:37,675 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-11-21 16:52:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:52:37,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 16:52:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:37,676 INFO L225 Difference]: With dead ends: 66 [2022-11-21 16:52:37,676 INFO L226 Difference]: Without dead ends: 66 [2022-11-21 16:52:37,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:52:37,678 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:37,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 118 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:52:37,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-21 16:52:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-11-21 16:52:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.575) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-11-21 16:52:37,685 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 8 [2022-11-21 16:52:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:37,686 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-11-21 16:52:37,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-11-21 16:52:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 16:52:37,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:37,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:37,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:52:37,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash 638916372, now seen corresponding path program 1 times [2022-11-21 16:52:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:37,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179280796] [2022-11-21 16:52:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:37,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:37,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179280796] [2022-11-21 16:52:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179280796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:37,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:37,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:52:37,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200154277] [2022-11-21 16:52:37,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:37,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:52:37,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:37,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:52:37,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:52:37,784 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:37,806 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-11-21 16:52:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:52:37,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-21 16:52:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:37,808 INFO L225 Difference]: With dead ends: 63 [2022-11-21 16:52:37,808 INFO L226 Difference]: Without dead ends: 63 [2022-11-21 16:52:37,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:52:37,809 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:37,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 113 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:52:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-21 16:52:37,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-11-21 16:52:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.511111111111111) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-11-21 16:52:37,816 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 9 [2022-11-21 16:52:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:37,816 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-11-21 16:52:37,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-11-21 16:52:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 16:52:37,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:37,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:37,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:52:37,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:37,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2114731710, now seen corresponding path program 1 times [2022-11-21 16:52:37,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:37,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311423443] [2022-11-21 16:52:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:37,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:37,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:37,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311423443] [2022-11-21 16:52:37,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311423443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:37,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510535356] [2022-11-21 16:52:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:37,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:37,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:37,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:52:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:38,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:52:38,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:38,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:38,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510535356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:38,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:52:38,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-11-21 16:52:38,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023634569] [2022-11-21 16:52:38,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:38,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:52:38,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:38,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:52:38,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:52:38,232 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:38,253 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-11-21 16:52:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:52:38,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-21 16:52:38,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:38,254 INFO L225 Difference]: With dead ends: 64 [2022-11-21 16:52:38,254 INFO L226 Difference]: Without dead ends: 64 [2022-11-21 16:52:38,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:52:38,256 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 16 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:38,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 167 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:52:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-21 16:52:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-21 16:52:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-11-21 16:52:38,262 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 15 [2022-11-21 16:52:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:38,263 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-11-21 16:52:38,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-11-21 16:52:38,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 16:52:38,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:38,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:38,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:38,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:38,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:38,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:38,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949021, now seen corresponding path program 1 times [2022-11-21 16:52:38,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:38,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407996626] [2022-11-21 16:52:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:38,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:38,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407996626] [2022-11-21 16:52:38,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407996626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600737899] [2022-11-21 16:52:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:38,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:38,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:38,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:38,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:52:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:52:38,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:38,903 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 [2022-11-21 16:52:38,958 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 16:52:38,959 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 [2022-11-21 16:52:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:38,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:39,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600737899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:39,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:52:39,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-11-21 16:52:39,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682466167] [2022-11-21 16:52:39,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:39,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:52:39,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:52:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:52:39,136 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:39,248 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2022-11-21 16:52:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:52:39,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-21 16:52:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:39,249 INFO L225 Difference]: With dead ends: 77 [2022-11-21 16:52:39,249 INFO L226 Difference]: Without dead ends: 77 [2022-11-21 16:52:39,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:52:39,251 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 266 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:39,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 66 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:52:39,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-21 16:52:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2022-11-21 16:52:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2022-11-21 16:52:39,256 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 16 [2022-11-21 16:52:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:39,256 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2022-11-21 16:52:39,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2022-11-21 16:52:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 16:52:39,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:39,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:39,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:39,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:39,464 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949020, now seen corresponding path program 1 times [2022-11-21 16:52:39,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:39,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041691737] [2022-11-21 16:52:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:39,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:39,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041691737] [2022-11-21 16:52:39,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041691737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:39,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224221321] [2022-11-21 16:52:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:39,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:39,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:39,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:39,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:52:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 16:52:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:39,860 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 [2022-11-21 16:52:39,867 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 [2022-11-21 16:52:39,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:52:39,949 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 [2022-11-21 16:52:39,965 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:52:39,966 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 [2022-11-21 16:52:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:39,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:46,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224221321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:46,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:52:46,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-21 16:52:46,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995549916] [2022-11-21 16:52:46,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:46,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:52:46,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:52:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:52:46,444 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:46,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:46,602 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-11-21 16:52:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:52:46,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-21 16:52:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:46,603 INFO L225 Difference]: With dead ends: 76 [2022-11-21 16:52:46,604 INFO L226 Difference]: Without dead ends: 76 [2022-11-21 16:52:46,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:52:46,605 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 346 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:46,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 67 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:52:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-21 16:52:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2022-11-21 16:52:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.446808510638298) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-11-21 16:52:46,611 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 16 [2022-11-21 16:52:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:46,611 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-11-21 16:52:46,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-11-21 16:52:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:52:46,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:46,613 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:46,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:46,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:46,830 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:46,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1891969267, now seen corresponding path program 2 times [2022-11-21 16:52:46,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:46,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606207092] [2022-11-21 16:52:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:46,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:46,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:46,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606207092] [2022-11-21 16:52:46,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606207092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:46,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800079315] [2022-11-21 16:52:46,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:52:46,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:46,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:46,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:46,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:52:47,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:52:47,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:52:47,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:52:47,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:47,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:47,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800079315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:47,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:52:47,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-21 16:52:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590113665] [2022-11-21 16:52:47,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:47,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:52:47,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:52:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:52:47,089 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:47,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:47,124 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-11-21 16:52:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:52:47,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-21 16:52:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:47,126 INFO L225 Difference]: With dead ends: 62 [2022-11-21 16:52:47,126 INFO L226 Difference]: Without dead ends: 62 [2022-11-21 16:52:47,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:52:47,127 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 103 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:47,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 56 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:52:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-21 16:52:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-21 16:52:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.425531914893617) internal successors, (67), 61 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-11-21 16:52:47,132 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 22 [2022-11-21 16:52:47,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:47,132 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-11-21 16:52:47,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-11-21 16:52:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:52:47,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:47,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:47,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:47,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-21 16:52:47,340 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1779022382, now seen corresponding path program 1 times [2022-11-21 16:52:47,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:47,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970036391] [2022-11-21 16:52:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:47,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:52:47,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:47,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970036391] [2022-11-21 16:52:47,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970036391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:47,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:47,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:52:47,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029081114] [2022-11-21 16:52:47,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:47,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:52:47,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:47,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:52:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:52:47,498 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:47,708 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2022-11-21 16:52:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:52:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-21 16:52:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:47,709 INFO L225 Difference]: With dead ends: 113 [2022-11-21 16:52:47,709 INFO L226 Difference]: Without dead ends: 113 [2022-11-21 16:52:47,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:52:47,710 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 259 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:47,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:52:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-21 16:52:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 65. [2022-11-21 16:52:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.46) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-11-21 16:52:47,714 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 23 [2022-11-21 16:52:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:47,715 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-11-21 16:52:47,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-11-21 16:52:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:52:47,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:47,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:47,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:52:47,716 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1779022381, now seen corresponding path program 1 times [2022-11-21 16:52:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:47,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501975814] [2022-11-21 16:52:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:52:48,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:48,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501975814] [2022-11-21 16:52:48,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501975814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:48,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:48,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:52:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578694045] [2022-11-21 16:52:48,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:48,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:52:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:52:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:52:48,013 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:48,223 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2022-11-21 16:52:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:52:48,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-21 16:52:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:48,224 INFO L225 Difference]: With dead ends: 100 [2022-11-21 16:52:48,224 INFO L226 Difference]: Without dead ends: 100 [2022-11-21 16:52:48,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:52:48,225 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 265 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:48,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 101 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:52:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-21 16:52:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2022-11-21 16:52:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.42) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-11-21 16:52:48,229 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 23 [2022-11-21 16:52:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:48,229 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-11-21 16:52:48,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-11-21 16:52:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 16:52:48,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:48,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:48,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:52:48,230 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:48,231 INFO L85 PathProgramCache]: Analyzing trace with hash -244809887, now seen corresponding path program 1 times [2022-11-21 16:52:48,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:48,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963571781] [2022-11-21 16:52:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:48,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:52:48,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:48,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963571781] [2022-11-21 16:52:48,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963571781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:48,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227870342] [2022-11-21 16:52:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:48,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:48,402 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:48,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:52:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:48,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:52:48,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:52:48,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:52:48,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227870342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:48,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:52:48,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-21 16:52:48,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105333132] [2022-11-21 16:52:48,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:48,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:52:48,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:48,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:52:48,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:52:48,586 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:48,608 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-11-21 16:52:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:52:48,610 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-21 16:52:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:48,612 INFO L225 Difference]: With dead ends: 65 [2022-11-21 16:52:48,612 INFO L226 Difference]: Without dead ends: 65 [2022-11-21 16:52:48,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:52:48,613 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 70 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:48,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 62 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:52:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-21 16:52:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2022-11-21 16:52:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-11-21 16:52:48,627 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 25 [2022-11-21 16:52:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:48,627 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-11-21 16:52:48,627 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-11-21 16:52:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:52:48,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:48,632 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:52:48,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:48,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:48,844 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:48,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1040689078, now seen corresponding path program 1 times [2022-11-21 16:52:48,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:48,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852000418] [2022-11-21 16:52:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:48,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:52:49,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:49,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852000418] [2022-11-21 16:52:49,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852000418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:49,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199413456] [2022-11-21 16:52:49,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:49,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:49,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:49,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:49,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:52:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:49,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:52:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:52:49,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:52:49,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199413456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:49,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:52:49,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 7 [2022-11-21 16:52:49,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448691281] [2022-11-21 16:52:49,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:49,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:52:49,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:52:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:52:49,251 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:49,296 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-11-21 16:52:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:52:49,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-21 16:52:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:49,297 INFO L225 Difference]: With dead ends: 49 [2022-11-21 16:52:49,297 INFO L226 Difference]: Without dead ends: 49 [2022-11-21 16:52:49,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:52:49,298 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:49,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 60 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:52:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-21 16:52:49,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-21 16:52:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-11-21 16:52:49,301 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 26 [2022-11-21 16:52:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:49,301 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-11-21 16:52:49,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-11-21 16:52:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:52:49,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:49,302 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] [2022-11-21 16:52:49,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:49,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:49,512 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:49,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1040689023, now seen corresponding path program 1 times [2022-11-21 16:52:49,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:49,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654221335] [2022-11-21 16:52:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:49,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:50,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:50,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654221335] [2022-11-21 16:52:50,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654221335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:50,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094544617] [2022-11-21 16:52:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:50,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:50,196 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:50,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:52:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:50,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-21 16:52:50,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:50,384 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 [2022-11-21 16:52:50,428 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:52:50,428 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 [2022-11-21 16:52:50,448 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 13 treesize of output 9 [2022-11-21 16:52:50,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:52:50,489 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:52:50,490 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 34 treesize of output 35 [2022-11-21 16:52:50,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-21 16:52:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:50,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:50,833 INFO L321 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-11-21 16:52:50,833 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 21 treesize of output 20 [2022-11-21 16:52:50,899 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_682 Int) (v_ArrVal_684 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_682)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) is different from false [2022-11-21 16:52:50,911 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:52:50,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2022-11-21 16:52:50,917 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 36 treesize of output 24 [2022-11-21 16:52:50,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-21 16:52:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-21 16:52:51,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094544617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:51,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:52:51,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 29 [2022-11-21 16:52:51,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807122071] [2022-11-21 16:52:51,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:51,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-21 16:52:51,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:51,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-21 16:52:51,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=719, Unknown=11, NotChecked=54, Total=870 [2022-11-21 16:52:51,019 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:52,104 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-11-21 16:52:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:52:52,105 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-21 16:52:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:52,105 INFO L225 Difference]: With dead ends: 97 [2022-11-21 16:52:52,106 INFO L226 Difference]: Without dead ends: 97 [2022-11-21 16:52:52,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=390, Invalid=1495, Unknown=11, NotChecked=84, Total=1980 [2022-11-21 16:52:52,107 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 542 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:52,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 315 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 463 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-11-21 16:52:52,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-21 16:52:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2022-11-21 16:52:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.28) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-21 16:52:52,110 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 26 [2022-11-21 16:52:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:52,110 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-21 16:52:52,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-21 16:52:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:52:52,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:52,111 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] [2022-11-21 16:52:52,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:52,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 16:52:52,324 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:52,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1040689024, now seen corresponding path program 1 times [2022-11-21 16:52:52,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:52,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909322179] [2022-11-21 16:52:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:52,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:53,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:53,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909322179] [2022-11-21 16:52:53,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909322179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:53,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101154607] [2022-11-21 16:52:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:53,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:53,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:53,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:53,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:52:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:53,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-21 16:52:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:53,365 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 [2022-11-21 16:52:53,440 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:52:53,441 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 [2022-11-21 16:52:53,494 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 13 treesize of output 9 [2022-11-21 16:52:53,502 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 13 treesize of output 9 [2022-11-21 16:52:53,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:52:53,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:52:53,632 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:52:53,632 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 54 treesize of output 53 [2022-11-21 16:52:53,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-11-21 16:52:53,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-21 16:52:53,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-21 16:52:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:52:54,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:54,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:52:54,398 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 47 treesize of output 51 [2022-11-21 16:52:54,619 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (.cse1 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (.cse2 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (and (forall ((v_ArrVal_785 Int) (v_ArrVal_787 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse0 .cse1 v_ArrVal_785)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_787) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse2))) (forall ((v_ArrVal_785 Int) (v_prenex_1 (Array Int Int))) (< (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse0 .cse1 v_ArrVal_785)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_1) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse2) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 9))) (forall ((v_ArrVal_788 (Array Int Int)) (v_ArrVal_784 Int)) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1 v_ArrVal_784)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_788) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse2) |c_ULTIMATE.start_dll_create_~head~0#1.base|)))) is different from false [2022-11-21 16:52:54,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:52:54,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2022-11-21 16:52:54,638 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 36 treesize of output 24 [2022-11-21 16:52:54,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-21 16:52:54,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:52:54,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2022-11-21 16:52:54,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:52:54,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-21 16:52:54,671 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-21 16:52:54,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 1 [2022-11-21 16:52:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-21 16:52:54,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101154607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:54,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:52:54,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 36 [2022-11-21 16:52:54,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928347249] [2022-11-21 16:52:54,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:54,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-21 16:52:54,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:54,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-21 16:52:54,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1145, Unknown=16, NotChecked=68, Total=1332 [2022-11-21 16:52:54,905 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 37 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:58,011 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2022-11-21 16:52:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:52:58,012 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-21 16:52:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:58,013 INFO L225 Difference]: With dead ends: 112 [2022-11-21 16:52:58,013 INFO L226 Difference]: Without dead ends: 112 [2022-11-21 16:52:58,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=460, Invalid=2180, Unknown=16, NotChecked=100, Total=2756 [2022-11-21 16:52:58,014 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1367 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:58,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1367 Valid, 331 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 583 Invalid, 0 Unknown, 76 Unchecked, 0.7s Time] [2022-11-21 16:52:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-21 16:52:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 56. [2022-11-21 16:52:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 55 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-11-21 16:52:58,017 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 26 [2022-11-21 16:52:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:58,018 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-11-21 16:52:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-11-21 16:52:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:52:58,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:58,019 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] [2022-11-21 16:52:58,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:58,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:52:58,220 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:58,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:58,220 INFO L85 PathProgramCache]: Analyzing trace with hash -709592258, now seen corresponding path program 1 times [2022-11-21 16:52:58,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:58,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356326830] [2022-11-21 16:52:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:58,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:52:58,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:58,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356326830] [2022-11-21 16:52:58,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356326830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:58,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:58,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:52:58,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001003277] [2022-11-21 16:52:58,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:58,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:52:58,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:52:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:52:58,363 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:58,506 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-11-21 16:52:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:52:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-21 16:52:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:58,508 INFO L225 Difference]: With dead ends: 67 [2022-11-21 16:52:58,508 INFO L226 Difference]: Without dead ends: 67 [2022-11-21 16:52:58,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:52:58,508 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:58,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 61 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:52:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-21 16:52:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-11-21 16:52:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-11-21 16:52:58,511 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 31 [2022-11-21 16:52:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:58,511 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-11-21 16:52:58,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-11-21 16:52:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:52:58,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:58,512 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] [2022-11-21 16:52:58,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 16:52:58,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash -709592257, now seen corresponding path program 1 times [2022-11-21 16:52:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:58,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789455479] [2022-11-21 16:52:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:58,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:52:58,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:58,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789455479] [2022-11-21 16:52:58,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789455479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:58,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005423292] [2022-11-21 16:52:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:58,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:58,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:58,678 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:58,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:52:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:52:58,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:52:58,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:52:58,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005423292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:58,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:52:58,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-21 16:52:58,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156311319] [2022-11-21 16:52:58,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:58,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:52:58,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:58,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:52:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:52:58,939 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:58,985 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-21 16:52:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:52:58,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-21 16:52:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:58,986 INFO L225 Difference]: With dead ends: 56 [2022-11-21 16:52:58,986 INFO L226 Difference]: Without dead ends: 56 [2022-11-21 16:52:58,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:52:58,987 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 60 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:58,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 83 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:52:58,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-21 16:52:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-11-21 16:52:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-11-21 16:52:58,991 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 31 [2022-11-21 16:52:58,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:58,992 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-11-21 16:52:58,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:58,993 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-11-21 16:52:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 16:52:58,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:58,993 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] [2022-11-21 16:52:59,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:59,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:52:59,203 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash -674776797, now seen corresponding path program 1 times [2022-11-21 16:52:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:59,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216622273] [2022-11-21 16:52:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:52:59,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:59,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216622273] [2022-11-21 16:52:59,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216622273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:52:59,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381049673] [2022-11-21 16:52:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:59,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:59,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:52:59,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:52:59,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:52:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:59,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:52:59,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:52:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:52:59,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:52:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:52:59,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381049673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:52:59,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:52:59,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-21 16:52:59,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314184235] [2022-11-21 16:52:59,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:52:59,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:52:59,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:52:59,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:52:59,641 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:59,680 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-11-21 16:52:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:52:59,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-21 16:52:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:59,681 INFO L225 Difference]: With dead ends: 57 [2022-11-21 16:52:59,681 INFO L226 Difference]: Without dead ends: 57 [2022-11-21 16:52:59,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:52:59,682 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:59,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 80 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:52:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-21 16:52:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-21 16:52:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-11-21 16:52:59,687 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 34 [2022-11-21 16:52:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:59,688 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-11-21 16:52:59,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-11-21 16:52:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 16:52:59,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:59,691 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] [2022-11-21 16:52:59,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:52:59,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 16:52:59,898 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:52:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:59,899 INFO L85 PathProgramCache]: Analyzing trace with hash -634882153, now seen corresponding path program 1 times [2022-11-21 16:52:59,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:59,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686322469] [2022-11-21 16:52:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:59,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:53:00,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:00,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686322469] [2022-11-21 16:53:00,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686322469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:53:00,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478031328] [2022-11-21 16:53:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:00,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:00,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:00,075 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:53:00,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:53:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:00,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:53:00,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:53:00,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:53:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:53:00,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478031328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:53:00,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:53:00,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-11-21 16:53:00,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841575738] [2022-11-21 16:53:00,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:53:00,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:53:00,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:53:00,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:53:00,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:53:00,363 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:53:00,417 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-11-21 16:53:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:53:00,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-21 16:53:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:53:00,418 INFO L225 Difference]: With dead ends: 52 [2022-11-21 16:53:00,419 INFO L226 Difference]: Without dead ends: 52 [2022-11-21 16:53:00,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:53:00,419 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 66 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:53:00,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 116 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:53:00,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-21 16:53:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-21 16:53:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-11-21 16:53:00,422 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2022-11-21 16:53:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:53:00,422 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-11-21 16:53:00,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-11-21 16:53:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:53:00,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:00,423 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] [2022-11-21 16:53:00,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:00,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 16:53:00,630 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:53:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:00,630 INFO L85 PathProgramCache]: Analyzing trace with hash -427165145, now seen corresponding path program 2 times [2022-11-21 16:53:00,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:00,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217474667] [2022-11-21 16:53:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:00,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:53:00,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:00,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217474667] [2022-11-21 16:53:00,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217474667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:53:00,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:53:00,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:53:00,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758999609] [2022-11-21 16:53:00,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:53:00,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:53:00,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:53:00,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:53:00,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:53:00,949 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:53:01,123 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-11-21 16:53:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:53:01,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-21 16:53:01,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:53:01,124 INFO L225 Difference]: With dead ends: 60 [2022-11-21 16:53:01,124 INFO L226 Difference]: Without dead ends: 60 [2022-11-21 16:53:01,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:53:01,125 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:53:01,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 36 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:53:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-21 16:53:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-11-21 16:53:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.163265306122449) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-11-21 16:53:01,127 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 39 [2022-11-21 16:53:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:53:01,127 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-11-21 16:53:01,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-11-21 16:53:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:53:01,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:01,128 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] [2022-11-21 16:53:01,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 16:53:01,128 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:53:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash -357219036, now seen corresponding path program 1 times [2022-11-21 16:53:01,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:01,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317317324] [2022-11-21 16:53:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:01,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:53:01,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:01,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317317324] [2022-11-21 16:53:01,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317317324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:53:01,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:53:01,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:53:01,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021567113] [2022-11-21 16:53:01,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:53:01,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:53:01,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:53:01,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:53:01,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:53:01,236 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:53:01,343 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2022-11-21 16:53:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:53:01,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-21 16:53:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:53:01,345 INFO L225 Difference]: With dead ends: 57 [2022-11-21 16:53:01,345 INFO L226 Difference]: Without dead ends: 57 [2022-11-21 16:53:01,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:53:01,345 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 138 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:53:01,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 58 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:53:01,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-21 16:53:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-11-21 16:53:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-11-21 16:53:01,347 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 40 [2022-11-21 16:53:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:53:01,348 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-11-21 16:53:01,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-11-21 16:53:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-21 16:53:01,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:01,348 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, 1] [2022-11-21 16:53:01,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 16:53:01,349 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:53:01,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:01,349 INFO L85 PathProgramCache]: Analyzing trace with hash 311339877, now seen corresponding path program 1 times [2022-11-21 16:53:01,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:01,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289567575] [2022-11-21 16:53:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:01,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:53:01,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:01,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289567575] [2022-11-21 16:53:01,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289567575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:53:01,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:53:01,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:53:01,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339218210] [2022-11-21 16:53:01,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:53:01,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:53:01,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:53:01,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:53:01,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:53:01,484 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:53:01,607 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-11-21 16:53:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:53:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-21 16:53:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:53:01,608 INFO L225 Difference]: With dead ends: 55 [2022-11-21 16:53:01,609 INFO L226 Difference]: Without dead ends: 55 [2022-11-21 16:53:01,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:53:01,609 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:53:01,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 45 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:53:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-21 16:53:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-21 16:53:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.14) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:01,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-11-21 16:53:01,611 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 42 [2022-11-21 16:53:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:53:01,611 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-11-21 16:53:01,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:01,612 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-11-21 16:53:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:53:01,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:01,612 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1] [2022-11-21 16:53:01,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 16:53:01,612 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:53:01,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:01,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2002912181, now seen corresponding path program 1 times [2022-11-21 16:53:01,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:01,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006342991] [2022-11-21 16:53:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:01,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:53:03,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:03,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006342991] [2022-11-21 16:53:03,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006342991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:53:03,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950932148] [2022-11-21 16:53:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:03,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:03,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:03,100 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:53:03,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:53:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:03,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-21 16:53:03,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:03,315 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 [2022-11-21 16:53:03,360 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:53:03,360 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 [2022-11-21 16:53:03,382 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 13 treesize of output 9 [2022-11-21 16:53:03,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:53:03,421 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:53:03,421 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 34 treesize of output 35 [2022-11-21 16:53:03,732 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:53:03,734 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 25 treesize of output 28 [2022-11-21 16:53:03,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:53:03,808 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 24 treesize of output 23 [2022-11-21 16:53:03,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:03,888 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 22 treesize of output 20 [2022-11-21 16:53:04,023 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:53:04,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 16:53:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:53:04,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:53:04,449 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int) (v_ArrVal_1453 Int) (v_ArrVal_1452 (Array Int Int))) (or (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1452) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1453) 4)) 1) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) is different from false [2022-11-21 16:53:04,476 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int) (v_ArrVal_1453 Int) (v_ArrVal_1452 (Array Int Int))) (or (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1452) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1453) 4)) 1) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) is different from false [2022-11-21 16:53:04,665 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int) (v_ArrVal_1453 Int) (v_ArrVal_1452 (Array Int Int))) (or (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1452) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1453) 4)) 1) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) is different from false [2022-11-21 16:53:04,683 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int) (v_ArrVal_1453 Int) (v_ArrVal_1452 (Array Int Int))) (or (< |c_ULTIMATE.start_dll_create_#res#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_create_#res#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) (+ |c_ULTIMATE.start_dll_create_#res#1.offset| 4)) v_ArrVal_1452) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1453) 4)) 1))) is different from false [2022-11-21 16:53:04,877 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int) (v_ArrVal_1453 Int) (v_ArrVal_1452 (Array Int Int))) (or (= (select (store |c_#valid| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1452) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1453) 4)) 1) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) is different from false [2022-11-21 16:53:04,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:04,896 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 61 treesize of output 65 [2022-11-21 16:53:04,942 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|) (forall ((v_ArrVal_1453 Int) (v_ArrVal_1452 (Array Int Int)) (v_ArrVal_1451 (Array Int Int))) (not (= (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1451))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) v_ArrVal_1452)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1453) 4) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (forall ((v_ArrVal_1453 Int) (v_ArrVal_1452 (Array Int Int)) (v_ArrVal_1451 (Array Int Int))) (= (select (store (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1451))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) v_ArrVal_1452)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1453) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))))) is different from false [2022-11-21 16:53:04,994 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (.cse3 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int) (v_ArrVal_1449 Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|) (forall ((v_ArrVal_1453 Int) (v_ArrVal_1452 (Array Int Int)) (v_ArrVal_1451 (Array Int Int))) (= (select (store (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse2 .cse3 v_ArrVal_1449)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1451))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) v_ArrVal_1452)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1453) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)))) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int) (v_ArrVal_1449 Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|) (forall ((v_ArrVal_1453 Int) (v_ArrVal_1452 (Array Int Int)) (v_ArrVal_1451 (Array Int Int))) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (select (store (select (let ((.cse4 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse2 .cse3 v_ArrVal_1449)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1451))) (store .cse4 (select (select .cse4 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) v_ArrVal_1452)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1453) 4)))))))) is different from false [2022-11-21 16:53:05,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:05,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 47 [2022-11-21 16:53:05,027 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 295 treesize of output 277 [2022-11-21 16:53:05,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:05,045 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 290 treesize of output 271 [2022-11-21 16:53:05,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:05,063 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 293 treesize of output 269 [2022-11-21 16:53:05,076 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 246 treesize of output 238 [2022-11-21 16:53:05,169 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-21 16:53:05,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 1 [2022-11-21 16:53:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-21 16:53:05,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950932148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:53:05,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:53:05,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 21] total 47 [2022-11-21 16:53:05,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131533421] [2022-11-21 16:53:05,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:53:05,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 16:53:05,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:53:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 16:53:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1483, Unknown=32, NotChecked=588, Total=2256 [2022-11-21 16:53:05,256 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 48 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:53:08,266 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-11-21 16:53:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:53:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-21 16:53:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:53:08,268 INFO L225 Difference]: With dead ends: 69 [2022-11-21 16:53:08,268 INFO L226 Difference]: Without dead ends: 69 [2022-11-21 16:53:08,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=504, Invalid=3032, Unknown=32, NotChecked=854, Total=4422 [2022-11-21 16:53:08,271 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 334 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 31 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:53:08,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 279 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 824 Invalid, 6 Unknown, 429 Unchecked, 1.3s Time] [2022-11-21 16:53:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-21 16:53:08,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2022-11-21 16:53:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.169811320754717) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-11-21 16:53:08,273 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 45 [2022-11-21 16:53:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:53:08,274 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-11-21 16:53:08,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-11-21 16:53:08,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:53:08,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:08,275 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1] [2022-11-21 16:53:08,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:08,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-21 16:53:08,481 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:53:08,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:08,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2002912180, now seen corresponding path program 1 times [2022-11-21 16:53:08,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:08,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344408987] [2022-11-21 16:53:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:08,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:53:10,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344408987] [2022-11-21 16:53:10,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344408987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:53:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750131041] [2022-11-21 16:53:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:10,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:10,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:10,152 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:53:10,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:53:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:10,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-21 16:53:10,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:10,378 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 [2022-11-21 16:53:10,470 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:53:10,470 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 [2022-11-21 16:53:10,523 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 13 treesize of output 9 [2022-11-21 16:53:10,533 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 13 treesize of output 9 [2022-11-21 16:53:10,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:53:10,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:53:10,645 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:53:10,646 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 46 treesize of output 45 [2022-11-21 16:53:10,658 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 22 treesize of output 24 [2022-11-21 16:53:11,093 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:53:11,093 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 42 treesize of output 41 [2022-11-21 16:53:11,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:53:11,106 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 20 treesize of output 22 [2022-11-21 16:53:11,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:53:11,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-21 16:53:11,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:53:11,238 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 19 treesize of output 18 [2022-11-21 16:53:11,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:11,389 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 17 treesize of output 15 [2022-11-21 16:53:11,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:11,401 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 27 treesize of output 21 [2022-11-21 16:53:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:53:11,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:53:14,572 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (forall ((v_ArrVal_1587 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1585) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 4))))) (forall ((v_ArrVal_1586 (Array Int Int)) (v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (forall ((v_ArrVal_1587 Int) (v_ArrVal_1589 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1585) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1586) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1589) 4))))))) is different from false [2022-11-21 16:53:14,617 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (forall ((v_ArrVal_1587 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1585) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 4))))) (forall ((v_ArrVal_1586 (Array Int Int)) (v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (forall ((v_ArrVal_1587 Int) (v_ArrVal_1589 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1585) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1586) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1589) 4)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|)))) is different from false [2022-11-21 16:53:14,644 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_dll_update_at_~head#1.offset| 4)))) (and (forall ((v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (forall ((v_ArrVal_1587 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1585) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 4))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) (forall ((v_ArrVal_1586 (Array Int Int)) (v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (forall ((v_ArrVal_1587 Int) (v_ArrVal_1589 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1585) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1586) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1589) 4)))))))) is different from false [2022-11-21 16:53:14,697 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (and (forall ((v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (forall ((v_ArrVal_1587 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1585) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 4))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) (forall ((v_ArrVal_1586 (Array Int Int)) (v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (forall ((v_ArrVal_1587 Int) (v_ArrVal_1589 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1585) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1586) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1589) 4)))))))) is different from false [2022-11-21 16:53:14,725 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) (+ |c_ULTIMATE.start_dll_create_#res#1.offset| 4)))) (and (forall ((v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (forall ((v_ArrVal_1587 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1585) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 4))) (< |c_ULTIMATE.start_dll_create_#res#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) (forall ((v_ArrVal_1586 (Array Int Int)) (v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (forall ((v_ArrVal_1587 Int) (v_ArrVal_1589 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1585) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1586) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1589) 4)))) (< |c_ULTIMATE.start_dll_create_#res#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))))) is different from false [2022-11-21 16:53:14,755 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)))) (and (forall ((v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (forall ((v_ArrVal_1587 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1585) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 4))) (< |c_ULTIMATE.start_dll_create_~head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) (forall ((v_ArrVal_1586 (Array Int Int)) (v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (forall ((v_ArrVal_1587 Int) (v_ArrVal_1589 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1585) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1586) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1589) 4)))) (< |c_ULTIMATE.start_dll_create_~head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))))) is different from false [2022-11-21 16:53:14,804 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)))) (and (forall ((v_ArrVal_1586 (Array Int Int)) (v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (forall ((v_ArrVal_1587 Int) (v_ArrVal_1589 Int)) (<= (+ 8 (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1585) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4)) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1586) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1589) 4)))) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) (forall ((v_ArrVal_1585 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (forall ((v_ArrVal_1587 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1585) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 4))))))) is different from false [2022-11-21 16:53:14,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:14,833 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 96 treesize of output 100 [2022-11-21 16:53:14,919 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (and (forall ((v_ArrVal_1585 (Array Int Int)) (v_ArrVal_1587 Int) (v_ArrVal_1584 (Array Int Int)) (v_ArrVal_1583 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (<= 0 (+ (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1584) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1583) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) v_ArrVal_1585) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 4)))) (forall ((v_prenex_6 Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| v_prenex_6) (forall ((v_prenex_3 Int) (v_prenex_2 (Array Int Int)) (v_prenex_4 (Array Int Int)) (v_prenex_5 (Array Int Int))) (< (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_4) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_5) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) v_prenex_2) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) v_prenex_6 v_prenex_3) 4) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 5))))) (forall ((v_prenex_6 Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| v_prenex_6) (forall ((v_ArrVal_1586 (Array Int Int)) (v_ArrVal_1589 Int) (v_prenex_5 (Array Int Int))) (= (select (store (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_5))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) v_ArrVal_1586)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) v_prenex_6 v_ArrVal_1589) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)))))) is different from false [2022-11-21 16:53:15,002 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (.cse1 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (and (forall ((v_ArrVal_1582 Int) (v_ArrVal_1585 (Array Int Int)) (v_ArrVal_1587 Int) (v_ArrVal_1584 (Array Int Int)) (v_ArrVal_1583 (Array Int Int)) (v_ArrVal_1579 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (<= 0 (+ (select (store (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse0 .cse1 v_ArrVal_1582)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1584) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse2 .cse1 v_ArrVal_1579)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1583) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse3) v_ArrVal_1585) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1587) 4) 4)))) (forall ((v_prenex_6 Int) (v_ArrVal_1582 Int) (v_ArrVal_1579 Int)) (or (forall ((v_prenex_3 Int) (v_prenex_2 (Array Int Int)) (v_prenex_4 (Array Int Int)) (v_prenex_5 (Array Int Int))) (< (select (store (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse0 .cse1 v_ArrVal_1582)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_4) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse2 .cse1 v_ArrVal_1579)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_5) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse3) v_prenex_2) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) v_prenex_6 v_prenex_3) 4) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 5))) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| v_prenex_6))) (forall ((v_prenex_6 Int) (v_ArrVal_1579 Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| v_prenex_6) (forall ((v_ArrVal_1586 (Array Int Int)) (v_ArrVal_1589 Int) (v_prenex_5 (Array Int Int))) (= (select (store (select (let ((.cse4 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse2 .cse1 v_ArrVal_1579)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_5))) (store .cse4 (select (select .cse4 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse3) v_ArrVal_1586)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) v_prenex_6 v_ArrVal_1589) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)))))) is different from false [2022-11-21 16:53:15,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:15,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 63 [2022-11-21 16:53:15,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:15,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 48 [2022-11-21 16:53:15,059 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 66 treesize of output 54 [2022-11-21 16:53:15,065 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 140 treesize of output 134 [2022-11-21 16:53:15,072 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 162 treesize of output 156 [2022-11-21 16:53:15,079 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 110 treesize of output 94 [2022-11-21 16:53:15,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:15,093 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 172 treesize of output 172 [2022-11-21 16:53:15,112 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 116 treesize of output 114 [2022-11-21 16:53:15,202 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-21 16:53:15,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 1 [2022-11-21 16:53:15,210 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-21 16:53:15,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 1 [2022-11-21 16:53:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-11-21 16:53:15,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750131041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:53:15,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:53:15,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 21] total 58 [2022-11-21 16:53:15,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626335822] [2022-11-21 16:53:15,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:53:15,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-21 16:53:15,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:53:15,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-21 16:53:15,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2271, Unknown=9, NotChecked=936, Total=3422 [2022-11-21 16:53:15,474 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 59 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:53:25,408 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2022-11-21 16:53:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:53:25,409 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-21 16:53:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:53:25,409 INFO L225 Difference]: With dead ends: 73 [2022-11-21 16:53:25,409 INFO L226 Difference]: Without dead ends: 73 [2022-11-21 16:53:25,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=665, Invalid=4332, Unknown=9, NotChecked=1314, Total=6320 [2022-11-21 16:53:25,411 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 485 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 38 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 655 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:53:25,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 328 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 971 Invalid, 7 Unknown, 655 Unchecked, 1.9s Time] [2022-11-21 16:53:25,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-21 16:53:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2022-11-21 16:53:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 59 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-11-21 16:53:25,414 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 45 [2022-11-21 16:53:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:53:25,414 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-11-21 16:53:25,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-11-21 16:53:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:53:25,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:25,416 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, 1, 1, 1, 1, 1] [2022-11-21 16:53:25,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:25,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:25,622 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:53:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:25,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1960736865, now seen corresponding path program 1 times [2022-11-21 16:53:25,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:25,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046255376] [2022-11-21 16:53:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:25,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:53:26,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:26,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046255376] [2022-11-21 16:53:26,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046255376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:53:26,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022972863] [2022-11-21 16:53:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:26,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:26,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:26,991 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:53:27,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:53:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:27,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-21 16:53:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:27,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:53:27,304 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:53:27,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-21 16:53:27,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-21 16:53:27,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-11-21 16:53:27,402 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:53:27,403 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 33 treesize of output 34 [2022-11-21 16:53:27,626 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:53:27,627 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 27 treesize of output 28 [2022-11-21 16:53:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:53:27,728 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 28 treesize of output 23 [2022-11-21 16:53:27,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:27,856 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 26 treesize of output 20 [2022-11-21 16:53:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:53:27,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:53:28,285 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1717 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1716 (Array Int Int))) (or (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1716) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1717) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-11-21 16:53:28,308 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1717 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1716 (Array Int Int))) (or (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1716) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1717) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-11-21 16:53:28,633 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1717 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1716 (Array Int Int))) (or (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) (+ |c_ULTIMATE.start_dll_create_#res#1.offset| 4)) v_ArrVal_1716) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1717) 4) 0)) (< |c_ULTIMATE.start_dll_create_#res#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-11-21 16:53:28,798 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1717 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1716 (Array Int Int))) (or (not (= 0 (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1716) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1717) 4))) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-11-21 16:53:28,993 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1717 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1716 (Array Int Int)) (v_ArrVal_1713 Int) (v_ArrVal_1715 (Array Int Int))) (or (not (= 0 (select (store (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_1713)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1715))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1716)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1717) 4))) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-11-21 16:53:29,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:29,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 47 [2022-11-21 16:53:29,023 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 295 treesize of output 277 [2022-11-21 16:53:29,032 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 312 treesize of output 304 [2022-11-21 16:53:29,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:29,052 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 335 treesize of output 311 [2022-11-21 16:53:29,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:29,077 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 266 treesize of output 247 [2022-11-21 16:53:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-21 16:53:29,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022972863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:53:29,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:53:29,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 22] total 44 [2022-11-21 16:53:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908960633] [2022-11-21 16:53:29,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:53:29,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-21 16:53:29,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:53:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-21 16:53:29,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1317, Unknown=32, NotChecked=390, Total=1892 [2022-11-21 16:53:29,397 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:53:31,936 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-11-21 16:53:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-21 16:53:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-21 16:53:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:53:31,938 INFO L225 Difference]: With dead ends: 70 [2022-11-21 16:53:31,938 INFO L226 Difference]: Without dead ends: 70 [2022-11-21 16:53:31,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=588, Invalid=3058, Unknown=34, NotChecked=610, Total=4290 [2022-11-21 16:53:31,940 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 336 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 28 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:53:31,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 313 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 591 Invalid, 3 Unknown, 324 Unchecked, 0.7s Time] [2022-11-21 16:53:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-21 16:53:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2022-11-21 16:53:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-11-21 16:53:31,943 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2022-11-21 16:53:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:53:31,943 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-11-21 16:53:31,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:31,944 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-11-21 16:53:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 16:53:31,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:31,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2022-11-21 16:53:31,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:32,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-21 16:53:32,151 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:53:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1223965472, now seen corresponding path program 1 times [2022-11-21 16:53:32,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:32,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937234824] [2022-11-21 16:53:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:32,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:53:33,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:33,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937234824] [2022-11-21 16:53:33,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937234824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:53:33,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405976530] [2022-11-21 16:53:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:33,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:33,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:33,531 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:53:33,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 16:53:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-21 16:53:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:33,821 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 16:53:33,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 16:53:34,031 INFO L321 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-11-21 16:53:34,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 33 [2022-11-21 16:53:34,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-21 16:53:34,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:53:34,401 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:53:34,402 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 62 [2022-11-21 16:53:35,248 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:53:35,248 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 61 [2022-11-21 16:53:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:53:35,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:35,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 29 [2022-11-21 16:53:35,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:53:35,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:53:35,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-21 16:53:35,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:35,719 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 30 [2022-11-21 16:53:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:53:35,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:53:37,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:37,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 61 [2022-11-21 16:53:37,675 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 328 treesize of output 306 [2022-11-21 16:53:37,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:37,711 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 310 treesize of output 286 [2022-11-21 16:53:37,725 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 292 treesize of output 284 [2022-11-21 16:53:37,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:37,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 346 treesize of output 324 [2022-11-21 16:53:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:53:39,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405976530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:53:39,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:53:39,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 57 [2022-11-21 16:53:39,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255502411] [2022-11-21 16:53:39,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:53:39,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-21 16:53:39,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:53:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-21 16:53:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3044, Unknown=8, NotChecked=0, Total=3306 [2022-11-21 16:53:39,661 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 58 states, 57 states have (on average 2.210526315789474) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:53:45,841 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2022-11-21 16:53:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 16:53:45,842 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.210526315789474) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-21 16:53:45,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:53:45,842 INFO L225 Difference]: With dead ends: 68 [2022-11-21 16:53:45,842 INFO L226 Difference]: Without dead ends: 68 [2022-11-21 16:53:45,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=962, Invalid=6504, Unknown=16, NotChecked=0, Total=7482 [2022-11-21 16:53:45,845 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 471 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 41 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:53:45,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 291 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 901 Invalid, 6 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 16:53:45,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-21 16:53:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2022-11-21 16:53:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.125) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-11-21 16:53:45,848 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 48 [2022-11-21 16:53:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:53:45,848 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-11-21 16:53:45,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.210526315789474) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-11-21 16:53:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:53:45,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:53:45,849 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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] [2022-11-21 16:53:45,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:46,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-21 16:53:46,055 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-21 16:53:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1116795216, now seen corresponding path program 2 times [2022-11-21 16:53:46,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:46,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809984474] [2022-11-21 16:53:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:46,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:53:48,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:48,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809984474] [2022-11-21 16:53:48,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809984474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:53:48,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370089982] [2022-11-21 16:53:48,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:53:48,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:48,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:48,562 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:53:48,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfcc5cd-a120-4736-bfaf-7ac49994438f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 16:53:48,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:53:48,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:53:48,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-21 16:53:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:48,819 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 [2022-11-21 16:53:48,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-21 16:53:48,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-21 16:53:48,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:53:48,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 16:53:48,927 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:53:48,927 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 [2022-11-21 16:53:48,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 16:53:48,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 16:53:49,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-21 16:53:49,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-21 16:53:49,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-21 16:53:49,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-21 16:53:49,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:53:49,221 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-21 16:53:49,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 62 [2022-11-21 16:53:49,239 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-21 16:53:49,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2022-11-21 16:53:49,938 INFO L321 Elim1Store]: treesize reduction 98, result has 41.0 percent of original size [2022-11-21 16:53:49,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 118 [2022-11-21 16:53:50,036 INFO L321 Elim1Store]: treesize reduction 52, result has 52.7 percent of original size [2022-11-21 16:53:50,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 123 [2022-11-21 16:53:50,961 INFO L321 Elim1Store]: treesize reduction 92, result has 35.2 percent of original size [2022-11-21 16:53:50,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 127 treesize of output 142 [2022-11-21 16:53:51,058 INFO L321 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2022-11-21 16:53:51,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 98 treesize of output 121 [2022-11-21 16:53:51,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:51,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-21 16:53:51,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-21 16:53:51,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-21 16:53:53,180 INFO L321 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-11-21 16:53:53,181 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 57 treesize of output 38 [2022-11-21 16:53:53,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:53,197 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 17 treesize of output 15 [2022-11-21 16:53:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:53:53,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:54:23,698 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse9 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8)) (.cse6 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (.cse7 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (and (forall ((v_ArrVal_1994 (Array Int Int)) (v_ArrVal_1991 Int) (v_ArrVal_1993 Int) (v_ArrVal_1985 Int) (v_ArrVal_1984 Int) (v_ArrVal_1987 Int) (v_ArrVal_1986 Int)) (= (select (let ((.cse0 (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse9 .cse7 v_ArrVal_1984)))) (store .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse5 v_ArrVal_1986)))) (.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse6 .cse7 v_ArrVal_1985)))) (store .cse4 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse5 v_ArrVal_1987))))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4)) (.cse2 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (select (store (store .cse0 .cse1 (store (select .cse0 .cse1) .cse2 v_ArrVal_1991)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_1994) (select (select (store .cse3 .cse1 (store (select .cse3 .cse1) .cse2 v_ArrVal_1993)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4)))) 4) 0)) (forall ((v_ArrVal_1993 Int) (v_ArrVal_1985 Int) (v_ArrVal_1996 Int) (v_ArrVal_1984 Int) (v_ArrVal_1987 Int) (v_ArrVal_1986 Int)) (= (select (let ((.cse10 (let ((.cse12 (let ((.cse15 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse6 .cse7 v_ArrVal_1985)))) (store .cse15 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse15 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse5 v_ArrVal_1987))))) (let ((.cse13 (select (select .cse12 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (store .cse12 .cse13 (store (select .cse12 .cse13) (select (select (let ((.cse14 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse9 .cse7 v_ArrVal_1984)))) (store .cse14 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse14 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse5 v_ArrVal_1986))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4) v_ArrVal_1993)))))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))) (select (store .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse11 0 v_ArrVal_1996)) (select .cse11 4)))) 4) 0)))) is different from false [2022-11-21 16:55:24,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:55:24,183 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 351 [2022-11-21 16:55:24,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:55:24,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 334 treesize of output 231 [2022-11-21 16:55:24,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:55:24,243 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 619 treesize of output 396 [2022-11-21 16:55:24,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:55:24,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 336 [2022-11-21 16:55:24,310 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (.cse6 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (and (forall ((v_arrayElimArr_15 (Array Int Int)) (v_arrayElimArr_16 (Array Int Int)) (v_ArrVal_1993 Int) (v_ArrVal_1996 Int) (v_ArrVal_1987 Int) (v_ArrVal_1986 Int)) (or (not (= (select v_arrayElimArr_15 .cse0) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_16 .cse0))) (= (select (let ((.cse1 (let ((.cse3 (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_15))) (store .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse6 v_ArrVal_1987))))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (store .cse3 .cse4 (store (select .cse3 .cse4) (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_16))) (store .cse5 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse5 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse6 v_ArrVal_1986))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4) v_ArrVal_1993)))))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))) (select (store .cse1 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse2 0 v_ArrVal_1996)) (select .cse2 4)))) 4) 0))) (forall ((v_arrayElimArr_13 (Array Int Int)) (v_arrayElimArr_14 (Array Int Int)) (v_ArrVal_1994 (Array Int Int)) (v_ArrVal_1991 Int) (v_ArrVal_1993 Int) (v_ArrVal_1987 Int) (v_ArrVal_1986 Int)) (or (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_13 .cse0))) (not (= (select v_arrayElimArr_14 .cse0) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (= (select (let ((.cse8 (let ((.cse13 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_13))) (store .cse13 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse13 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse6 v_ArrVal_1986)))) (.cse11 (let ((.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_14))) (store .cse12 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse6 v_ArrVal_1987))))) (let ((.cse9 (select (select .cse11 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4)) (.cse10 (select (select .cse8 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (select (store (store .cse8 .cse9 (store (select .cse8 .cse9) .cse10 v_ArrVal_1991)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_1994) (select (select (store .cse11 .cse9 (store (select .cse11 .cse9) .cse10 v_ArrVal_1993)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4)))) 4) 0))))) is different from false [2022-11-21 16:55:27,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:55:27,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 514 treesize of output 415 [2022-11-21 16:55:27,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:55:27,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 394 treesize of output 235 [2022-11-21 16:55:27,884 INFO L321 Elim1Store]: treesize reduction 414, result has 52.4 percent of original size [2022-11-21 16:55:27,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1747702 treesize of output 1687655 [2022-11-21 16:55:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:55:30,544 INFO L321 Elim1Store]: treesize reduction 10, result has 76.7 percent of original size [2022-11-21 16:55:30,550 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 40784912 treesize of output 38057365