./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f1ad2d5826e88851ec05294e79547a11a54665f4a2cf6f0e66f9eabed656148f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:23:53,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:23:53,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:23:53,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:23:53,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:23:53,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:23:53,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:23:53,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:23:53,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:23:53,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:23:53,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:23:53,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:23:53,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:23:53,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:23:53,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:23:53,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:23:53,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:23:53,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:23:53,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:23:53,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:23:53,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:23:53,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:23:53,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:23:53,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:23:53,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:23:53,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:23:53,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:23:53,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:23:53,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:23:53,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:23:53,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:23:53,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:23:53,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:23:53,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:23:53,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:23:53,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:23:53,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:23:53,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:23:53,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:23:53,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:23:53,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:23:53,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-12-13 17:23:53,282 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:23:53,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:23:53,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:23:53,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:23:53,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:23:53,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:23:53,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:23:53,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:23:53,284 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:23:53,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:23:53,284 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:23:53,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:23:53,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:23:53,285 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:23:53,285 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:23:53,285 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:23:53,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:23:53,285 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:23:53,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:23:53,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:23:53,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:23:53,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:23:53,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:23:53,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:23:53,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:23:53,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:23:53,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:23:53,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:23:53,287 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:23:53,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:23:53,287 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:23:53,288 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1ad2d5826e88851ec05294e79547a11a54665f4a2cf6f0e66f9eabed656148f [2022-12-13 17:23:53,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:23:53,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:23:53,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:23:53,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:23:53,473 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:23:53,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i [2022-12-13 17:23:56,114 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:23:56,331 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:23:56,332 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i [2022-12-13 17:23:56,341 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/data/1e6f075b8/a6790c6b75aa4390815d704f6462693f/FLAG07c22ae5c [2022-12-13 17:23:56,355 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/data/1e6f075b8/a6790c6b75aa4390815d704f6462693f [2022-12-13 17:23:56,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:23:56,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:23:56,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:23:56,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:23:56,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:23:56,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614b61a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56, skipping insertion in model container [2022-12-13 17:23:56,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:23:56,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:23:56,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:23:56,625 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:23:56,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:23:56,665 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:23:56,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56 WrapperNode [2022-12-13 17:23:56,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:23:56,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:23:56,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:23:56,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:23:56,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,693 INFO L138 Inliner]: procedures = 111, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2022-12-13 17:23:56,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:23:56,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:23:56,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:23:56,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:23:56,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,710 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:23:56,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:23:56,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:23:56,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:23:56,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (1/1) ... [2022-12-13 17:23:56,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:23:56,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:23:56,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:23:56,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:23:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:23:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:23:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:23:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:23:56,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:23:56,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:23:56,838 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:23:56,839 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:23:56,980 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:23:56,985 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:23:56,985 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 17:23:56,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:23:56 BoogieIcfgContainer [2022-12-13 17:23:56,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:23:56,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:23:56,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:23:56,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:23:56,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:23:56" (1/3) ... [2022-12-13 17:23:56,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30185958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:23:56, skipping insertion in model container [2022-12-13 17:23:56,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:23:56" (2/3) ... [2022-12-13 17:23:56,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30185958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:23:56, skipping insertion in model container [2022-12-13 17:23:56,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:23:56" (3/3) ... [2022-12-13 17:23:56,992 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-2.i [2022-12-13 17:23:57,006 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:23:57,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-12-13 17:23:57,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:23:57,049 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@52851f54, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:23:57,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-12-13 17:23:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 17:23:57,056 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:57,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:23:57,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:57,061 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2022-12-13 17:23:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:57,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444900596] [2022-12-13 17:23:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:57,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:57,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444900596] [2022-12-13 17:23:57,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444900596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:57,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:57,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:23:57,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778204055] [2022-12-13 17:23:57,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:57,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:23:57,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:57,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:23:57,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:23:57,338 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 37 states have internal predecessors, (47), 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) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:57,378 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-12-13 17:23:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:23:57,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 17:23:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:57,385 INFO L225 Difference]: With dead ends: 37 [2022-12-13 17:23:57,386 INFO L226 Difference]: Without dead ends: 35 [2022-12-13 17:23:57,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:23:57,391 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:57,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-13 17:23:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-13 17:23:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.826086956521739) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-12-13 17:23:57,421 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 6 [2022-12-13 17:23:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:57,421 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-12-13 17:23:57,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-12-13 17:23:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 17:23:57,422 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:57,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:23:57,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:23:57,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:57,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2022-12-13 17:23:57,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:57,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745823188] [2022-12-13 17:23:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:57,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:57,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:57,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745823188] [2022-12-13 17:23:57,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745823188] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:57,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:57,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:23:57,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552495114] [2022-12-13 17:23:57,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:57,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:23:57,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:23:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:23:57,574 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:57,627 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-12-13 17:23:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:23:57,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 17:23:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:57,628 INFO L225 Difference]: With dead ends: 65 [2022-12-13 17:23:57,628 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 17:23:57,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:23:57,629 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 68 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 64 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 [2022-12-13 17:23:57,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 64 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 17:23:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 37. [2022-12-13 17:23:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.76) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-12-13 17:23:57,634 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 6 [2022-12-13 17:23:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:57,634 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-12-13 17:23:57,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-12-13 17:23:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 17:23:57,635 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:57,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:23:57,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:23:57,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash 889512654, now seen corresponding path program 1 times [2022-12-13 17:23:57,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:57,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470193235] [2022-12-13 17:23:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:57,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:57,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470193235] [2022-12-13 17:23:57,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470193235] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:57,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:57,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:23:57,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239446787] [2022-12-13 17:23:57,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:57,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:23:57,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:57,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:23:57,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:57,783 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:57,813 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-12-13 17:23:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:23:57,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 17:23:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:57,815 INFO L225 Difference]: With dead ends: 36 [2022-12-13 17:23:57,815 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 17:23:57,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:57,816 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:57,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 17:23:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-12-13 17:23:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-12-13 17:23:57,819 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 6 [2022-12-13 17:23:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:57,820 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-12-13 17:23:57,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-12-13 17:23:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 17:23:57,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:57,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:57,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:23:57,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:57,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028874, now seen corresponding path program 1 times [2022-12-13 17:23:57,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:57,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604657201] [2022-12-13 17:23:57,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:57,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:57,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:57,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604657201] [2022-12-13 17:23:57,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604657201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:57,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:57,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:23:57,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975667830] [2022-12-13 17:23:57,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:57,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:23:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:57,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:23:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:23:57,930 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:57,993 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-12-13 17:23:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:23:57,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 17:23:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:57,994 INFO L225 Difference]: With dead ends: 63 [2022-12-13 17:23:57,994 INFO L226 Difference]: Without dead ends: 63 [2022-12-13 17:23:57,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:57,996 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:57,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-13 17:23:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 33. [2022-12-13 17:23:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-12-13 17:23:58,001 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 7 [2022-12-13 17:23:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:58,001 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-12-13 17:23:58,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-12-13 17:23:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 17:23:58,002 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:58,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:58,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:23:58,002 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:58,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028875, now seen corresponding path program 1 times [2022-12-13 17:23:58,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:58,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116218135] [2022-12-13 17:23:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:58,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:58,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:58,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116218135] [2022-12-13 17:23:58,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116218135] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:58,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:58,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:23:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74262951] [2022-12-13 17:23:58,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:23:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:23:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:23:58,109 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:58,154 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-12-13 17:23:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:23:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 17:23:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:58,156 INFO L225 Difference]: With dead ends: 62 [2022-12-13 17:23:58,156 INFO L226 Difference]: Without dead ends: 62 [2022-12-13 17:23:58,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:23:58,157 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:58,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 86 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-13 17:23:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2022-12-13 17:23:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-12-13 17:23:58,161 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 7 [2022-12-13 17:23:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:58,161 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-12-13 17:23:58,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-12-13 17:23:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 17:23:58,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:58,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:58,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:23:58,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1806875917, now seen corresponding path program 1 times [2022-12-13 17:23:58,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:58,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492332670] [2022-12-13 17:23:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:58,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:58,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:58,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492332670] [2022-12-13 17:23:58,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492332670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:58,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:58,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:23:58,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419483154] [2022-12-13 17:23:58,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:58,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:23:58,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:58,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:23:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:58,260 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:58,286 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-12-13 17:23:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:23:58,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 17:23:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:58,287 INFO L225 Difference]: With dead ends: 36 [2022-12-13 17:23:58,287 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 17:23:58,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:58,288 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:58,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 28 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 17:23:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-12-13 17:23:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-12-13 17:23:58,290 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2022-12-13 17:23:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:58,290 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-12-13 17:23:58,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-12-13 17:23:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 17:23:58,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:58,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:58,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:23:58,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:58,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1023682221, now seen corresponding path program 1 times [2022-12-13 17:23:58,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:58,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997423395] [2022-12-13 17:23:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:58,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:58,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997423395] [2022-12-13 17:23:58,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997423395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:58,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:58,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:23:58,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238405131] [2022-12-13 17:23:58,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:58,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:23:58,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:23:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:23:58,327 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:58,356 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-12-13 17:23:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:23:58,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2022-12-13 17:23:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:58,357 INFO L225 Difference]: With dead ends: 31 [2022-12-13 17:23:58,357 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 17:23:58,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:58,358 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:58,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 17:23:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-13 17:23:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-12-13 17:23:58,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 12 [2022-12-13 17:23:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:58,361 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-12-13 17:23:58,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-12-13 17:23:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 17:23:58,361 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:58,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:58,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:23:58,361 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:58,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1023682220, now seen corresponding path program 1 times [2022-12-13 17:23:58,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:58,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015607496] [2022-12-13 17:23:58,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:58,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:58,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:58,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015607496] [2022-12-13 17:23:58,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015607496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:58,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:58,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:23:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475801414] [2022-12-13 17:23:58,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:58,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:23:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:23:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:23:58,453 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:58,501 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-12-13 17:23:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:23:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2022-12-13 17:23:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:58,502 INFO L225 Difference]: With dead ends: 45 [2022-12-13 17:23:58,502 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 17:23:58,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:23:58,503 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 157 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:58,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 56 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 17:23:58,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-12-13 17:23:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-12-13 17:23:58,506 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 12 [2022-12-13 17:23:58,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:58,506 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-12-13 17:23:58,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,506 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-12-13 17:23:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 17:23:58,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:58,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:58,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:23:58,507 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:58,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1024481548, now seen corresponding path program 1 times [2022-12-13 17:23:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:58,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777352932] [2022-12-13 17:23:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:58,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:58,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777352932] [2022-12-13 17:23:58,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777352932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:58,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:58,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:23:58,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266219778] [2022-12-13 17:23:58,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:58,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:23:58,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:23:58,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:58,574 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:58,618 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-12-13 17:23:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:23:58,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2022-12-13 17:23:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:58,620 INFO L225 Difference]: With dead ends: 35 [2022-12-13 17:23:58,620 INFO L226 Difference]: Without dead ends: 35 [2022-12-13 17:23:58,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:23:58,621 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:58,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:58,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-13 17:23:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-13 17:23:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-12-13 17:23:58,625 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 12 [2022-12-13 17:23:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:58,625 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-12-13 17:23:58,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-12-13 17:23:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 17:23:58,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:58,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:58,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:23:58,626 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1024481547, now seen corresponding path program 1 times [2022-12-13 17:23:58,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:58,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102963162] [2022-12-13 17:23:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:58,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:58,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:58,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102963162] [2022-12-13 17:23:58,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102963162] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:58,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:58,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 17:23:58,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845821419] [2022-12-13 17:23:58,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:58,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:23:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:23:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:23:58,787 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:58,863 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-12-13 17:23:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:23:58,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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 12 [2022-12-13 17:23:58,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:58,864 INFO L225 Difference]: With dead ends: 45 [2022-12-13 17:23:58,864 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 17:23:58,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:23:58,865 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 155 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:58,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 71 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 17:23:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-12-13 17:23:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-12-13 17:23:58,868 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 12 [2022-12-13 17:23:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:58,868 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-12-13 17:23:58,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-12-13 17:23:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 17:23:58,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:58,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:58,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:23:58,869 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1668578326, now seen corresponding path program 1 times [2022-12-13 17:23:58,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:58,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216062307] [2022-12-13 17:23:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:58,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:58,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:58,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216062307] [2022-12-13 17:23:58,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216062307] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:58,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:58,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:23:58,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537841298] [2022-12-13 17:23:58,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:58,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:23:58,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:58,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:23:58,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:23:58,896 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:58,904 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-12-13 17:23:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:23:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2022-12-13 17:23:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:58,905 INFO L225 Difference]: With dead ends: 41 [2022-12-13 17:23:58,905 INFO L226 Difference]: Without dead ends: 41 [2022-12-13 17:23:58,905 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 [2022-12-13 17:23:58,906 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:58,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 60 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-13 17:23:58,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-12-13 17:23:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-12-13 17:23:58,908 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 13 [2022-12-13 17:23:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:58,909 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-12-13 17:23:58,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-12-13 17:23:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 17:23:58,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:58,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:58,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 17:23:58,910 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1669372656, now seen corresponding path program 1 times [2022-12-13 17:23:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:58,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551451187] [2022-12-13 17:23:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:58,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:58,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551451187] [2022-12-13 17:23:58,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551451187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:58,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:58,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:23:58,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467738281] [2022-12-13 17:23:58,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:58,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:23:58,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:58,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:23:58,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:58,962 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:59,001 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-12-13 17:23:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:23:59,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2022-12-13 17:23:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:59,002 INFO L225 Difference]: With dead ends: 36 [2022-12-13 17:23:59,002 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 17:23:59,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:23:59,003 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:59,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 50 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 17:23:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-13 17:23:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-12-13 17:23:59,006 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 13 [2022-12-13 17:23:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:59,006 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-12-13 17:23:59,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-12-13 17:23:59,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 17:23:59,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:59,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:59,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 17:23:59,007 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:59,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1669372655, now seen corresponding path program 1 times [2022-12-13 17:23:59,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:59,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525787993] [2022-12-13 17:23:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:59,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:59,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525787993] [2022-12-13 17:23:59,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525787993] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:59,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:59,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:23:59,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415002215] [2022-12-13 17:23:59,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:59,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:23:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:23:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:23:59,073 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:59,106 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2022-12-13 17:23:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:23:59,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-12-13 17:23:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:59,107 INFO L225 Difference]: With dead ends: 67 [2022-12-13 17:23:59,108 INFO L226 Difference]: Without dead ends: 67 [2022-12-13 17:23:59,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:59,108 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 28 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:59,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 102 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-13 17:23:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2022-12-13 17:23:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.457142857142857) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-12-13 17:23:59,111 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 13 [2022-12-13 17:23:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:59,111 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-12-13 17:23:59,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-12-13 17:23:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 17:23:59,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:59,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:59,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 17:23:59,112 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:59,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:59,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1694156907, now seen corresponding path program 1 times [2022-12-13 17:23:59,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:59,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528769167] [2022-12-13 17:23:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:59,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:59,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:59,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528769167] [2022-12-13 17:23:59,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528769167] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:59,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:59,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:23:59,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146103444] [2022-12-13 17:23:59,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:59,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:23:59,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:23:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:59,157 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:59,199 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-12-13 17:23:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:23:59,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2022-12-13 17:23:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:59,200 INFO L225 Difference]: With dead ends: 40 [2022-12-13 17:23:59,200 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 17:23:59,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:23:59,201 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:59,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 17:23:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-13 17:23:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-12-13 17:23:59,204 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 13 [2022-12-13 17:23:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:59,204 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-12-13 17:23:59,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-12-13 17:23:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 17:23:59,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:59,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:59,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 17:23:59,205 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:59,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1694156906, now seen corresponding path program 1 times [2022-12-13 17:23:59,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:59,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454063344] [2022-12-13 17:23:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:59,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:59,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:59,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454063344] [2022-12-13 17:23:59,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454063344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:59,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:59,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 17:23:59,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556184560] [2022-12-13 17:23:59,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:59,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:23:59,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:59,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:23:59,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:23:59,323 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:59,386 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2022-12-13 17:23:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:23:59,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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 13 [2022-12-13 17:23:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:59,387 INFO L225 Difference]: With dead ends: 50 [2022-12-13 17:23:59,387 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 17:23:59,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:23:59,388 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 110 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:59,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 73 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 17:23:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-12-13 17:23:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-12-13 17:23:59,390 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 13 [2022-12-13 17:23:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:59,391 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-12-13 17:23:59,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-12-13 17:23:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 17:23:59,391 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:59,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:59,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 17:23:59,392 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2062399665, now seen corresponding path program 1 times [2022-12-13 17:23:59,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:59,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779606206] [2022-12-13 17:23:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:59,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:59,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:59,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779606206] [2022-12-13 17:23:59,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779606206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:59,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:59,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:23:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287317625] [2022-12-13 17:23:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:59,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:23:59,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:23:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:59,459 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:59,482 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-12-13 17:23:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:23:59,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2022-12-13 17:23:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:59,483 INFO L225 Difference]: With dead ends: 40 [2022-12-13 17:23:59,483 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 17:23:59,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:23:59,484 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:59,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 17:23:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-12-13 17:23:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-12-13 17:23:59,485 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 13 [2022-12-13 17:23:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:59,485 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-12-13 17:23:59,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-12-13 17:23:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:23:59,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:59,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:59,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 17:23:59,486 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:59,487 INFO L85 PathProgramCache]: Analyzing trace with hash -292644845, now seen corresponding path program 1 times [2022-12-13 17:23:59,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:59,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248852865] [2022-12-13 17:23:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:59,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:59,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:59,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248852865] [2022-12-13 17:23:59,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248852865] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:59,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:59,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:23:59,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397277245] [2022-12-13 17:23:59,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:59,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:23:59,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:59,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:23:59,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:23:59,579 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:59,595 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-12-13 17:23:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:23:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 [2022-12-13 17:23:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:59,596 INFO L225 Difference]: With dead ends: 34 [2022-12-13 17:23:59,596 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 17:23:59,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:23:59,597 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:59,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 17:23:59,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-13 17:23:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-12-13 17:23:59,598 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 15 [2022-12-13 17:23:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:59,598 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-12-13 17:23:59,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-12-13 17:23:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:23:59,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:59,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:59,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 17:23:59,599 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash -293439174, now seen corresponding path program 1 times [2022-12-13 17:23:59,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:59,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482434616] [2022-12-13 17:23:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:59,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:59,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:59,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482434616] [2022-12-13 17:23:59,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482434616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:59,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:59,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 17:23:59,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970322192] [2022-12-13 17:23:59,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:59,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:23:59,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:59,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:23:59,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:23:59,728 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:59,811 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-12-13 17:23:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:23:59,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 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 [2022-12-13 17:23:59,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:59,811 INFO L225 Difference]: With dead ends: 34 [2022-12-13 17:23:59,811 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 17:23:59,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:23:59,812 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:59,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 52 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 17:23:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-12-13 17:23:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-12-13 17:23:59,817 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2022-12-13 17:23:59,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:59,817 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-12-13 17:23:59,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,817 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-12-13 17:23:59,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 17:23:59,818 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:59,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:59,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 17:23:59,818 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:59,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1614011486, now seen corresponding path program 1 times [2022-12-13 17:23:59,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:59,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515797860] [2022-12-13 17:23:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:59,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:23:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:23:59,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515797860] [2022-12-13 17:23:59,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515797860] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:23:59,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:23:59,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:23:59,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202042853] [2022-12-13 17:23:59,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:23:59,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:23:59,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:23:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:23:59,891 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:23:59,926 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-12-13 17:23:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:23:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2022-12-13 17:23:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:23:59,927 INFO L225 Difference]: With dead ends: 49 [2022-12-13 17:23:59,927 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 17:23:59,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:23:59,928 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:23:59,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:23:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 17:23:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-12-13 17:23:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-12-13 17:23:59,929 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 17 [2022-12-13 17:23:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:23:59,929 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-12-13 17:23:59,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:23:59,930 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-12-13 17:23:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 17:23:59,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:23:59,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:23:59,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 17:23:59,930 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:23:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:23:59,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1669838560, now seen corresponding path program 1 times [2022-12-13 17:23:59,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:23:59,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829980643] [2022-12-13 17:23:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:23:59,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:23:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:00,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:00,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829980643] [2022-12-13 17:24:00,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829980643] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:24:00,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:24:00,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 17:24:00,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336834137] [2022-12-13 17:24:00,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:24:00,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:24:00,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:24:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:24:00,144 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:00,263 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-12-13 17:24:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:24:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 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 17 [2022-12-13 17:24:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:00,264 INFO L225 Difference]: With dead ends: 50 [2022-12-13 17:24:00,264 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 17:24:00,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:24:00,264 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:00,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 92 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:24:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 17:24:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-12-13 17:24:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 45 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) [2022-12-13 17:24:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-12-13 17:24:00,266 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 17 [2022-12-13 17:24:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:00,266 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-12-13 17:24:00,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-12-13 17:24:00,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 17:24:00,266 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:00,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:00,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 17:24:00,266 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1669873381, now seen corresponding path program 1 times [2022-12-13 17:24:00,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:00,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527718729] [2022-12-13 17:24:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:00,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:00,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:00,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527718729] [2022-12-13 17:24:00,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527718729] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:24:00,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:24:00,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 17:24:00,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226581228] [2022-12-13 17:24:00,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:24:00,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:24:00,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:00,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:24:00,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:24:00,398 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:00,473 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2022-12-13 17:24:00,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:24:00,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 17 [2022-12-13 17:24:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:00,474 INFO L225 Difference]: With dead ends: 76 [2022-12-13 17:24:00,474 INFO L226 Difference]: Without dead ends: 76 [2022-12-13 17:24:00,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:24:00,475 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:00,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 120 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:24:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-13 17:24:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 57. [2022-12-13 17:24:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 56 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) [2022-12-13 17:24:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-12-13 17:24:00,476 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 17 [2022-12-13 17:24:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:00,477 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-12-13 17:24:00,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-12-13 17:24:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 17:24:00,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:00,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:00,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 17:24:00,477 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash 390009703, now seen corresponding path program 1 times [2022-12-13 17:24:00,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:00,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771818827] [2022-12-13 17:24:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:00,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:00,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:00,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771818827] [2022-12-13 17:24:00,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771818827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:00,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186380786] [2022-12-13 17:24:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:00,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:00,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:00,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:00,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:24:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:00,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:24:00,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:00,831 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:24:00,831 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 17:24:00,847 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 14 treesize of output 10 [2022-12-13 17:24:01,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:01,037 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 20 treesize of output 17 [2022-12-13 17:24:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:01,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:01,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 17:24:01,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 17:24:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:01,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186380786] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:01,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:01,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2022-12-13 17:24:01,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132373746] [2022-12-13 17:24:01,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:01,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:24:01,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:24:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:24:01,420 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:01,888 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-12-13 17:24:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:24:01,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 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 17 [2022-12-13 17:24:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:01,889 INFO L225 Difference]: With dead ends: 69 [2022-12-13 17:24:01,889 INFO L226 Difference]: Without dead ends: 69 [2022-12-13 17:24:01,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:24:01,890 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 116 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:01,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 201 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:24:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-13 17:24:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2022-12-13 17:24:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 57 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) [2022-12-13 17:24:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-12-13 17:24:01,891 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 17 [2022-12-13 17:24:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:01,895 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-12-13 17:24:01,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-12-13 17:24:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 17:24:01,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:01,896 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:01,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:24:02,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 17:24:02,098 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1587969641, now seen corresponding path program 1 times [2022-12-13 17:24:02,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:02,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499811496] [2022-12-13 17:24:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:02,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:24:02,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:02,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499811496] [2022-12-13 17:24:02,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499811496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:24:02,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:24:02,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:24:02,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875720824] [2022-12-13 17:24:02,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:24:02,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:24:02,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:02,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:24:02,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:24:02,212 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:02,223 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-12-13 17:24:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:24:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 18 [2022-12-13 17:24:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:02,224 INFO L225 Difference]: With dead ends: 58 [2022-12-13 17:24:02,225 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 17:24:02,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:24:02,225 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:02,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 57 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:24:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 17:24:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-13 17:24:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 57 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) [2022-12-13 17:24:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-12-13 17:24:02,228 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 18 [2022-12-13 17:24:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:02,228 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-12-13 17:24:02,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:02,229 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-12-13 17:24:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 17:24:02,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:02,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:02,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 17:24:02,230 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash -794601116, now seen corresponding path program 1 times [2022-12-13 17:24:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:02,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849738045] [2022-12-13 17:24:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:02,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:02,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849738045] [2022-12-13 17:24:02,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849738045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:02,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129036315] [2022-12-13 17:24:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:02,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:02,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:02,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:02,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:24:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 17:24:02,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:02,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:02,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 17:24:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:02,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129036315] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:02,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:02,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-12-13 17:24:02,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611774001] [2022-12-13 17:24:02,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:02,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:24:02,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:02,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:24:02,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:24:02,813 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:03,084 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-12-13 17:24:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:24:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 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 18 [2022-12-13 17:24:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:03,085 INFO L225 Difference]: With dead ends: 64 [2022-12-13 17:24:03,086 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 17:24:03,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:24:03,086 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:03,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 145 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:24:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 17:24:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-12-13 17:24:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 58 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) [2022-12-13 17:24:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-12-13 17:24:03,088 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 18 [2022-12-13 17:24:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:03,088 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-12-13 17:24:03,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-12-13 17:24:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 17:24:03,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:03,088 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:03,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:24:03,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:03,289 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:03,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1911210821, now seen corresponding path program 1 times [2022-12-13 17:24:03,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:03,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808269985] [2022-12-13 17:24:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:03,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:03,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:03,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808269985] [2022-12-13 17:24:03,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808269985] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:24:03,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:24:03,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 17:24:03,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303525611] [2022-12-13 17:24:03,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:24:03,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:24:03,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:03,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:24:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:24:03,481 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-12-13 17:24:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:03,604 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2022-12-13 17:24:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:24:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 19 [2022-12-13 17:24:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:03,605 INFO L225 Difference]: With dead ends: 79 [2022-12-13 17:24:03,605 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 17:24:03,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:24:03,606 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:03,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 141 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:24:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 17:24:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2022-12-13 17:24:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.2) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-12-13 17:24:03,608 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 19 [2022-12-13 17:24:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:03,608 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-12-13 17:24:03,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-12-13 17:24:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 17:24:03,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:03,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:03,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 17:24:03,609 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:03,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:03,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1602912287, now seen corresponding path program 1 times [2022-12-13 17:24:03,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:03,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614303754] [2022-12-13 17:24:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:03,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:03,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:03,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614303754] [2022-12-13 17:24:03,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614303754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:24:03,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:24:03,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:24:03,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921597273] [2022-12-13 17:24:03,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:24:03,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:24:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:24:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:24:03,673 INFO L87 Difference]: Start difference. First operand 59 states and 66 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) [2022-12-13 17:24:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:03,686 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-12-13 17:24:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:24:03,686 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 19 [2022-12-13 17:24:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:03,687 INFO L225 Difference]: With dead ends: 61 [2022-12-13 17:24:03,687 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 17:24:03,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:24:03,687 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:03,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 63 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:24:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 17:24:03,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-12-13 17:24:03,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 47 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) [2022-12-13 17:24:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-12-13 17:24:03,688 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 19 [2022-12-13 17:24:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:03,688 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-12-13 17:24:03,688 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) [2022-12-13 17:24:03,688 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-12-13 17:24:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 17:24:03,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:03,689 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:03,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 17:24:03,689 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:03,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:03,689 INFO L85 PathProgramCache]: Analyzing trace with hash 322862919, now seen corresponding path program 1 times [2022-12-13 17:24:03,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:03,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608421253] [2022-12-13 17:24:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:03,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:03,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:03,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608421253] [2022-12-13 17:24:03,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608421253] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:03,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38950721] [2022-12-13 17:24:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:03,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:03,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:03,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:03,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:24:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:03,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 17:24:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:04,009 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 10 treesize of output 8 [2022-12-13 17:24:04,029 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 14 treesize of output 10 [2022-12-13 17:24:04,165 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 17 treesize of output 19 [2022-12-13 17:24:04,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:04,256 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 20 treesize of output 17 [2022-12-13 17:24:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:04,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:04,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:04,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 17:24:04,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:04,622 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 37 treesize of output 34 [2022-12-13 17:24:04,627 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 11 treesize of output 7 [2022-12-13 17:24:04,631 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 16 treesize of output 12 [2022-12-13 17:24:04,692 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 10 treesize of output 8 [2022-12-13 17:24:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:04,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38950721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:04,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:04,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-12-13 17:24:04,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411141112] [2022-12-13 17:24:04,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:04,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:24:04,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:04,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:24:04,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=523, Unknown=1, NotChecked=0, Total=600 [2022-12-13 17:24:04,700 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:05,161 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-12-13 17:24:05,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:24:05,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 25 states have internal predecessors, (47), 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 19 [2022-12-13 17:24:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:05,162 INFO L225 Difference]: With dead ends: 56 [2022-12-13 17:24:05,162 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 17:24:05,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=866, Unknown=1, NotChecked=0, Total=1056 [2022-12-13 17:24:05,163 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 177 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:05,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 127 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:24:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 17:24:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-12-13 17:24:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-12-13 17:24:05,164 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 19 [2022-12-13 17:24:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:05,164 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-12-13 17:24:05,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-12-13 17:24:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 17:24:05,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:05,165 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:05,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:24:05,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 17:24:05,367 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:05,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1858742718, now seen corresponding path program 1 times [2022-12-13 17:24:05,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:05,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799482407] [2022-12-13 17:24:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:05,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:05,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799482407] [2022-12-13 17:24:05,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799482407] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573848904] [2022-12-13 17:24:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:05,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:05,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:05,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:05,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:24:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:05,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 17:24:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:05,784 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 14 treesize of output 10 [2022-12-13 17:24:05,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:05,915 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 20 treesize of output 17 [2022-12-13 17:24:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:05,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:06,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 17:24:06,195 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 20 treesize of output 16 [2022-12-13 17:24:06,198 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 39 treesize of output 31 [2022-12-13 17:24:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:06,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573848904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:06,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:06,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-13 17:24:06,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261127975] [2022-12-13 17:24:06,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:06,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:24:06,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:06,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:24:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:24:06,211 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:06,715 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-12-13 17:24:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:24:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 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 21 [2022-12-13 17:24:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:06,716 INFO L225 Difference]: With dead ends: 58 [2022-12-13 17:24:06,716 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 17:24:06,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:24:06,717 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:06,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 106 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:24:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 17:24:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-12-13 17:24:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-12-13 17:24:06,719 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 21 [2022-12-13 17:24:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:06,719 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-12-13 17:24:06,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-12-13 17:24:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 17:24:06,720 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:06,720 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:06,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:24:06,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 17:24:06,922 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1977459818, now seen corresponding path program 2 times [2022-12-13 17:24:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:06,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653517496] [2022-12-13 17:24:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:07,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:07,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653517496] [2022-12-13 17:24:07,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653517496] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:07,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130832893] [2022-12-13 17:24:07,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:24:07,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:07,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:07,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:07,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:24:07,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:24:07,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:24:07,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-13 17:24:07,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:07,474 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 10 treesize of output 8 [2022-12-13 17:24:07,502 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 14 treesize of output 10 [2022-12-13 17:24:07,652 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 17 treesize of output 19 [2022-12-13 17:24:07,944 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-12-13 17:24:07,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2022-12-13 17:24:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:08,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:08,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:08,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-12-13 17:24:08,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:08,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 63 [2022-12-13 17:24:08,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-12-13 17:24:08,559 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 16 treesize of output 12 [2022-12-13 17:24:08,626 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 10 treesize of output 8 [2022-12-13 17:24:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:08,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130832893] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:08,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:08,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-12-13 17:24:08,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943199646] [2022-12-13 17:24:08,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:08,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 17:24:08,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:08,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 17:24:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1012, Unknown=1, NotChecked=0, Total=1122 [2022-12-13 17:24:08,638 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 34 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) [2022-12-13 17:24:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:10,176 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-12-13 17:24:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 17:24:10,177 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 34 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) Word has length 22 [2022-12-13 17:24:10,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:10,177 INFO L225 Difference]: With dead ends: 57 [2022-12-13 17:24:10,177 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 17:24:10,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=361, Invalid=1800, Unknown=1, NotChecked=0, Total=2162 [2022-12-13 17:24:10,178 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 146 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:10,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 197 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:24:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 17:24:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-13 17:24:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-12-13 17:24:10,180 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 22 [2022-12-13 17:24:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:10,180 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-12-13 17:24:10,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 34 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) [2022-12-13 17:24:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-12-13 17:24:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 17:24:10,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:10,181 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:10,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:24:10,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 17:24:10,382 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:10,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:10,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1295436171, now seen corresponding path program 2 times [2022-12-13 17:24:10,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:10,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589863604] [2022-12-13 17:24:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:10,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:10,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:10,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589863604] [2022-12-13 17:24:10,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589863604] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:10,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861677098] [2022-12-13 17:24:10,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:24:10,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:10,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:10,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:10,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:24:10,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:24:10,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:24:10,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-13 17:24:10,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:24:10,930 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 9 treesize of output 11 [2022-12-13 17:24:10,938 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 17:24:10,938 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 19 treesize of output 18 [2022-12-13 17:24:10,990 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 14 treesize of output 10 [2022-12-13 17:24:10,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 17:24:11,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:24:11,205 INFO L321 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2022-12-13 17:24:11,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2022-12-13 17:24:11,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:11,387 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 19 treesize of output 15 [2022-12-13 17:24:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:11,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:11,992 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 147 treesize of output 141 [2022-12-13 17:24:11,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 69 [2022-12-13 17:24:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:12,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861677098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:12,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:12,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2022-12-13 17:24:12,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893389429] [2022-12-13 17:24:12,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:12,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 17:24:12,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:12,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 17:24:12,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 17:24:12,148 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:13,852 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-12-13 17:24:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:24:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 36 states have internal predecessors, (60), 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 [2022-12-13 17:24:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:13,853 INFO L225 Difference]: With dead ends: 54 [2022-12-13 17:24:13,853 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 17:24:13,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=351, Invalid=2099, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 17:24:13,854 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 161 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:13,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 252 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:24:13,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 17:24:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2022-12-13 17:24:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-12-13 17:24:13,855 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 22 [2022-12-13 17:24:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:13,855 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-12-13 17:24:13,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-12-13 17:24:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 17:24:13,858 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:13,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:13,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:24:14,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:14,060 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1503815658, now seen corresponding path program 2 times [2022-12-13 17:24:14,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:14,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595118422] [2022-12-13 17:24:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:14,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:14,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:14,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595118422] [2022-12-13 17:24:14,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595118422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:14,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192688799] [2022-12-13 17:24:14,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:24:14,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:14,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:14,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:14,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:24:14,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:24:14,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:24:14,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 17:24:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:14,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:15,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 17:24:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:15,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192688799] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:15,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:15,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-12-13 17:24:15,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261357085] [2022-12-13 17:24:15,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:15,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:24:15,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:24:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:24:15,306 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 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) [2022-12-13 17:24:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:16,302 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-12-13 17:24:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 17:24:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 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) Word has length 23 [2022-12-13 17:24:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:16,303 INFO L225 Difference]: With dead ends: 44 [2022-12-13 17:24:16,303 INFO L226 Difference]: Without dead ends: 44 [2022-12-13 17:24:16,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 17:24:16,304 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:16,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 194 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:24:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-13 17:24:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-12-13 17:24:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-12-13 17:24:16,305 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 23 [2022-12-13 17:24:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:16,305 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-12-13 17:24:16,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 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) [2022-12-13 17:24:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-12-13 17:24:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 17:24:16,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:16,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:16,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 17:24:16,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 17:24:16,507 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1209019757, now seen corresponding path program 1 times [2022-12-13 17:24:16,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:16,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049080817] [2022-12-13 17:24:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:16,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:17,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049080817] [2022-12-13 17:24:17,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049080817] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747077267] [2022-12-13 17:24:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:17,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:17,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:17,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:17,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:24:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 17:24:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:17,124 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:24:17,124 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 17:24:17,127 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 10 treesize of output 8 [2022-12-13 17:24:17,148 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 14 treesize of output 10 [2022-12-13 17:24:17,357 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 26 treesize of output 26 [2022-12-13 17:24:17,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-12-13 17:24:17,646 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-12-13 17:24:17,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2022-12-13 17:24:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:17,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:20,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:20,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-12-13 17:24:20,275 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 38 treesize of output 34 [2022-12-13 17:24:20,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-12-13 17:24:20,288 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 11 treesize of output 7 [2022-12-13 17:24:20,369 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 10 treesize of output 8 [2022-12-13 17:24:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:20,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747077267] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:20,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:20,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 36 [2022-12-13 17:24:20,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315258170] [2022-12-13 17:24:20,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:20,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 17:24:20,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 17:24:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1210, Unknown=4, NotChecked=0, Total=1332 [2022-12-13 17:24:20,390 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 37 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) [2022-12-13 17:24:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:22,118 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-12-13 17:24:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:24:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 37 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) Word has length 24 [2022-12-13 17:24:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:22,119 INFO L225 Difference]: With dead ends: 47 [2022-12-13 17:24:22,119 INFO L226 Difference]: Without dead ends: 47 [2022-12-13 17:24:22,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=382, Invalid=2476, Unknown=4, NotChecked=0, Total=2862 [2022-12-13 17:24:22,119 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 181 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:22,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 165 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:24:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-13 17:24:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-12-13 17:24:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-12-13 17:24:22,120 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2022-12-13 17:24:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:22,121 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-12-13 17:24:22,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 37 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) [2022-12-13 17:24:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-12-13 17:24:22,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:24:22,121 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:22,121 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:22,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:24:22,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:22,323 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash -311820898, now seen corresponding path program 2 times [2022-12-13 17:24:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:22,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547022748] [2022-12-13 17:24:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:23,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:23,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547022748] [2022-12-13 17:24:23,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547022748] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:23,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721874541] [2022-12-13 17:24:23,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:24:23,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:23,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:23,670 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:23,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:24:23,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:24:23,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:24:23,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-13 17:24:23,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:23,764 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:24:23,764 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 17:24:23,809 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 14 treesize of output 10 [2022-12-13 17:24:24,108 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:24:24,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-12-13 17:24:24,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:24,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 17:24:24,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:24:24,446 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-13 17:24:24,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 62 [2022-12-13 17:24:24,954 INFO L321 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-12-13 17:24:24,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 38 [2022-12-13 17:24:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:25,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:25,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:25,914 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 1 case distinctions, treesize of input 35 treesize of output 33 [2022-12-13 17:24:26,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:26,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 48 [2022-12-13 17:24:26,140 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 63 treesize of output 57 [2022-12-13 17:24:26,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 46 [2022-12-13 17:24:26,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:26,163 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 31 treesize of output 37 [2022-12-13 17:24:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:26,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721874541] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:26,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:26,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 48 [2022-12-13 17:24:26,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472010888] [2022-12-13 17:24:26,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:26,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 17:24:26,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:26,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 17:24:26,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2171, Unknown=2, NotChecked=0, Total=2352 [2022-12-13 17:24:26,327 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 49 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 49 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) [2022-12-13 17:24:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:34,224 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-12-13 17:24:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 17:24:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 49 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) Word has length 27 [2022-12-13 17:24:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:34,225 INFO L225 Difference]: With dead ends: 66 [2022-12-13 17:24:34,225 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 17:24:34,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=688, Invalid=5790, Unknown=2, NotChecked=0, Total=6480 [2022-12-13 17:24:34,226 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 147 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 15 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:34,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 207 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 723 Invalid, 6 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 17:24:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 17:24:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2022-12-13 17:24:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.1) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-12-13 17:24:34,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 27 [2022-12-13 17:24:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:34,227 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-12-13 17:24:34,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 49 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) [2022-12-13 17:24:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-12-13 17:24:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:24:34,228 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:34,228 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:34,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 17:24:34,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 17:24:34,429 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:24:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1895773145, now seen corresponding path program 3 times [2022-12-13 17:24:34,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:34,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726709428] [2022-12-13 17:24:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:34,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726709428] [2022-12-13 17:24:34,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726709428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057353929] [2022-12-13 17:24:34,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:24:34,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:34,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:34,948 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:34,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:24:35,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 17:24:35,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:24:35,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-13 17:24:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:35,220 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 10 treesize of output 8 [2022-12-13 17:24:35,223 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 9 treesize of output 11 [2022-12-13 17:24:35,243 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 14 treesize of output 10 [2022-12-13 17:24:35,458 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 24 [2022-12-13 17:24:35,867 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 32 treesize of output 30 [2022-12-13 17:24:38,217 INFO L321 Elim1Store]: treesize reduction 8, result has 87.3 percent of original size [2022-12-13 17:24:38,218 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 6 case distinctions, treesize of input 36 treesize of output 69 [2022-12-13 17:24:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:38,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:43,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:43,998 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 2 case distinctions, treesize of input 58 treesize of output 46 [2022-12-13 17:24:44,015 INFO L321 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-12-13 17:24:44,015 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 2 case distinctions, treesize of input 34 treesize of output 39 [2022-12-13 17:24:44,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:44,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 94 [2022-12-13 17:24:44,051 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 11 treesize of output 7 [2022-12-13 17:24:44,063 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 9 treesize of output 7 [2022-12-13 17:24:44,395 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 10 treesize of output 8 [2022-12-13 17:24:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:44,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057353929] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:44,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:44,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 46 [2022-12-13 17:24:44,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792532063] [2022-12-13 17:24:44,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:44,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 17:24:44,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:44,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 17:24:44,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1986, Unknown=22, NotChecked=0, Total=2162 [2022-12-13 17:24:44,413 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 47 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:53,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:24:55,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:25:09,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:25:12,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:25:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:25:16,159 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-12-13 17:25:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:25:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 47 states have internal predecessors, (75), 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 27 [2022-12-13 17:25:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:25:16,159 INFO L225 Difference]: With dead ends: 55 [2022-12-13 17:25:16,159 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 17:25:16,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=514, Invalid=3491, Unknown=27, NotChecked=0, Total=4032 [2022-12-13 17:25:16,160 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 222 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:25:16,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 421 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 632 Invalid, 3 Unknown, 0 Unchecked, 9.6s Time] [2022-12-13 17:25:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 17:25:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-12-13 17:25:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-12-13 17:25:16,161 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 27 [2022-12-13 17:25:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:25:16,162 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-12-13 17:25:16,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-12-13 17:25:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 17:25:16,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:25:16,162 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:25:16,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 17:25:16,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:16,363 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:25:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash -988583554, now seen corresponding path program 3 times [2022-12-13 17:25:16,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:25:16,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846828923] [2022-12-13 17:25:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:25:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:25:17,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:25:17,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846828923] [2022-12-13 17:25:17,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846828923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:25:17,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073731795] [2022-12-13 17:25:17,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:25:17,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:17,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:25:17,038 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:25:17,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:25:17,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 17:25:17,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:25:17,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-13 17:25:17,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:17,212 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 10 treesize of output 8 [2022-12-13 17:25:17,243 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 14 treesize of output 10 [2022-12-13 17:25:17,512 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 24 [2022-12-13 17:25:19,808 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 25 treesize of output 25 [2022-12-13 17:25:50,758 INFO L321 Elim1Store]: treesize reduction 16, result has 89.1 percent of original size [2022-12-13 17:25:50,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 153 [2022-12-13 17:25:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:25:51,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:26:14,991 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_41| Int) (v_ArrVal_539 (Array Int Int)) (v_ArrVal_538 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_45| Int) (|v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_67| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_538) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_539) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43|) 0) (<= (+ |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_67| 1) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_41|) 0) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_45| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43|) (= (select .cse0 (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_67|)) 0) (not (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_45| |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_41|) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_45|) 0) (not (<= 1 |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_67|)) (< (+ 2 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_41|) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_67|)))) (= |c_ULTIMATE.start_cstrlcpy_#t~mem5#1| 0)) is different from false [2022-12-13 17:26:20,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:26:20,161 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 2 case distinctions, treesize of input 100 treesize of output 66 [2022-12-13 17:26:20,168 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 101 treesize of output 91 [2022-12-13 17:26:20,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:26:20,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 128 treesize of output 204 [2022-12-13 17:26:20,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:26:20,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 83 [2022-12-13 17:26:20,303 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 16 treesize of output 12 [2022-12-13 17:26:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:26:22,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073731795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:26:22,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:26:22,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 59 [2022-12-13 17:26:22,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917519027] [2022-12-13 17:26:22,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:26:22,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-13 17:26:22,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:26:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-13 17:26:22,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3106, Unknown=36, NotChecked=114, Total=3540 [2022-12-13 17:26:22,300 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 60 states, 59 states have (on average 1.576271186440678) internal successors, (93), 60 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:26,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:26:28,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:26:30,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:26:32,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:26:40,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:26:46,262 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 116 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:26:48,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:26:50,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:26:53,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:26:55,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:27:02,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:27:24,549 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 116 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:27:53,496 WARN L233 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 72 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:28:04,133 WARN L233 SmtUtils]: Spent 10.20s on a formula simplification. DAG size of input: 76 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:28:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:07,961 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-12-13 17:28:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 17:28:07,962 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.576271186440678) internal successors, (93), 60 states have internal predecessors, (93), 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 33 [2022-12-13 17:28:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:07,962 INFO L225 Difference]: With dead ends: 82 [2022-12-13 17:28:07,962 INFO L226 Difference]: Without dead ends: 82 [2022-12-13 17:28:07,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 144.8s TimeCoverageRelationStatistics Valid=1218, Invalid=9858, Unknown=58, NotChecked=208, Total=11342 [2022-12-13 17:28:07,965 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 163 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 17 mSolverCounterUnsat, 41 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 41 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:07,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 298 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 759 Invalid, 41 Unknown, 54 Unchecked, 21.8s Time] [2022-12-13 17:28:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-13 17:28:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2022-12-13 17:28:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 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) [2022-12-13 17:28:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-12-13 17:28:07,966 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 33 [2022-12-13 17:28:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:07,966 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-12-13 17:28:07,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.576271186440678) internal successors, (93), 60 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-12-13 17:28:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 17:28:07,967 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:07,967 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:07,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 17:28:08,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 17:28:08,168 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:28:08,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1944831582, now seen corresponding path program 4 times [2022-12-13 17:28:08,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:08,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449468339] [2022-12-13 17:28:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:08,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:11,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:11,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449468339] [2022-12-13 17:28:11,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449468339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:11,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278789649] [2022-12-13 17:28:11,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:28:11,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:11,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:11,133 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:11,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:28:11,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:28:11,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:11,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-13 17:28:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:11,275 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:28:11,276 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 17:28:11,331 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 14 treesize of output 10 [2022-12-13 17:28:11,666 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:28:11,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-12-13 17:28:11,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:11,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 17:28:12,157 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:28:12,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 55 [2022-12-13 17:28:12,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:12,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:12,186 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 41 treesize of output 47 [2022-12-13 17:28:12,776 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:28:12,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2022-12-13 17:28:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:12,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:12,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:12,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 59 [2022-12-13 17:28:13,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:13,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:13,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:13,249 INFO L321 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2022-12-13 17:28:13,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 67 treesize of output 83 [2022-12-13 17:28:14,020 INFO L321 Elim1Store]: treesize reduction 32, result has 47.5 percent of original size [2022-12-13 17:28:14,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 56 treesize of output 54 [2022-12-13 17:28:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:14,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:15,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:15,350 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 1 case distinctions, treesize of input 35 treesize of output 33 [2022-12-13 17:28:17,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:17,296 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 2 case distinctions, treesize of input 106 treesize of output 72 [2022-12-13 17:28:17,300 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 113 treesize of output 103 [2022-12-13 17:28:17,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 80 [2022-12-13 17:28:17,320 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 11 treesize of output 7 [2022-12-13 17:28:17,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:17,334 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 31 treesize of output 37 [2022-12-13 17:28:17,341 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 11 treesize of output 7 [2022-12-13 17:28:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:17,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278789649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:17,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:17,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 77 [2022-12-13 17:28:17,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323864085] [2022-12-13 17:28:17,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:17,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-13 17:28:17,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:17,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-13 17:28:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=5663, Unknown=37, NotChecked=0, Total=6006 [2022-12-13 17:28:17,629 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 78 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 78 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:41,010 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-12-13 17:28:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-13 17:28:41,011 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 78 states have internal predecessors, (106), 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 37 [2022-12-13 17:28:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:41,012 INFO L225 Difference]: With dead ends: 124 [2022-12-13 17:28:41,012 INFO L226 Difference]: Without dead ends: 124 [2022-12-13 17:28:41,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3819 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=1676, Invalid=17180, Unknown=50, NotChecked=0, Total=18906 [2022-12-13 17:28:41,014 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 595 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 59 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:41,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 353 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1683 Invalid, 19 Unknown, 0 Unchecked, 2.5s Time] [2022-12-13 17:28:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-12-13 17:28:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2022-12-13 17:28:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 87 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-12-13 17:28:41,016 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 37 [2022-12-13 17:28:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:41,016 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-12-13 17:28:41,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 78 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-12-13 17:28:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 17:28:41,016 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:41,016 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:41,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 17:28:41,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 17:28:41,218 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:28:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash -849334011, now seen corresponding path program 5 times [2022-12-13 17:28:41,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:41,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63450292] [2022-12-13 17:28:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:41,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:42,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:42,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63450292] [2022-12-13 17:28:42,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63450292] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:42,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381830898] [2022-12-13 17:28:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:28:42,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:42,055 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:42,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 17:28:42,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 17:28:42,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:42,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 137 conjunts are in the unsatisfiable core [2022-12-13 17:28:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:42,196 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:28:42,196 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 17:28:42,237 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 14 treesize of output 10 [2022-12-13 17:28:42,498 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:28:42,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-12-13 17:28:42,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:42,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 17:28:42,952 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:28:42,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 55 [2022-12-13 17:28:42,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:42,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:42,981 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 41 treesize of output 47 [2022-12-13 17:28:43,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:43,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:43,338 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-12-13 17:28:43,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 72 [2022-12-13 17:28:44,965 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-13 17:28:44,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 70 [2022-12-13 17:28:44,969 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 17:28:44,973 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 17:28:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:45,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:47,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:47,723 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 1 case distinctions, treesize of input 86 treesize of output 69 [2022-12-13 17:28:49,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:49,253 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 2 case distinctions, treesize of input 152 treesize of output 96 [2022-12-13 17:28:49,258 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 163 treesize of output 149 [2022-12-13 17:28:49,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 114 [2022-12-13 17:28:49,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:49,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 88 [2022-12-13 17:28:49,325 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 11 treesize of output 7 [2022-12-13 17:28:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:49,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381830898] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:49,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:49,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 30] total 78 [2022-12-13 17:28:49,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723066281] [2022-12-13 17:28:49,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:49,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-13 17:28:49,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-13 17:28:49,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=5762, Unknown=10, NotChecked=0, Total=6162 [2022-12-13 17:28:49,812 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 79 states, 78 states have (on average 1.5) internal successors, (117), 79 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:10,099 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2022-12-13 17:29:10,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-13 17:29:10,099 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.5) internal successors, (117), 79 states have internal predecessors, (117), 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 41 [2022-12-13 17:29:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:10,100 INFO L225 Difference]: With dead ends: 159 [2022-12-13 17:29:10,100 INFO L226 Difference]: Without dead ends: 159 [2022-12-13 17:29:10,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5102 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=2470, Invalid=24221, Unknown=41, NotChecked=0, Total=26732 [2022-12-13 17:29:10,102 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 369 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 75 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:10,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 630 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2535 Invalid, 13 Unknown, 0 Unchecked, 2.7s Time] [2022-12-13 17:29:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-13 17:29:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 125. [2022-12-13 17:29:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0806451612903225) internal successors, (134), 124 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2022-12-13 17:29:10,105 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 41 [2022-12-13 17:29:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:10,106 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2022-12-13 17:29:10,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.5) internal successors, (117), 79 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2022-12-13 17:29:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:29:10,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:10,107 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:10,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 17:29:10,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 17:29:10,308 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:29:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:10,309 INFO L85 PathProgramCache]: Analyzing trace with hash 835428926, now seen corresponding path program 6 times [2022-12-13 17:29:10,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:10,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990926338] [2022-12-13 17:29:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:10,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:11,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:11,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990926338] [2022-12-13 17:29:11,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990926338] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:11,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469543366] [2022-12-13 17:29:11,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:29:11,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:11,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:11,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:11,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 17:29:11,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 17:29:11,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:11,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 159 conjunts are in the unsatisfiable core [2022-12-13 17:29:11,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:11,379 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:29:11,379 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 17:29:11,383 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 10 treesize of output 8 [2022-12-13 17:29:11,428 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 14 treesize of output 10 [2022-12-13 17:29:11,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-13 17:29:11,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-12-13 17:29:12,403 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 43 treesize of output 39 [2022-12-13 17:29:12,639 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 44 treesize of output 40 [2022-12-13 17:29:14,109 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-12-13 17:29:14,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 65 treesize of output 63 [2022-12-13 17:29:14,112 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 17:29:14,117 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 17:29:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:14,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:18,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:29:18,610 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 2 case distinctions, treesize of input 152 treesize of output 96 [2022-12-13 17:29:18,614 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 163 treesize of output 149 [2022-12-13 17:29:18,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 114 [2022-12-13 17:29:18,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-12-13 17:29:18,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 17:29:18,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 17:29:18,896 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 10 treesize of output 8 [2022-12-13 17:29:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:18,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469543366] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:18,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:18,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 31] total 82 [2022-12-13 17:29:18,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110889241] [2022-12-13 17:29:18,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:18,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 17:29:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:18,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 17:29:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=6322, Unknown=69, NotChecked=0, Total=6806 [2022-12-13 17:29:18,946 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 83 states, 82 states have (on average 1.5) internal successors, (123), 83 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:27,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:29:36,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:29:41,323 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (div |c_ULTIMATE.start_main_~length~0#1| 18446744073709551616))) (let ((.cse0 (and (<= (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (<= 0 (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))) (.cse1 (forall ((v_ArrVal_663 (Array Int Int)) (v_ArrVal_664 (Array Int Int))) (let ((.cse5 (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_663) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_664) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse5 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0) (= (select .cse5 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0) (= (select .cse5 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0) (= (select .cse5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0))))) (.cse2 (+ (* 18446744073709551616 .cse4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|))) (.cse3 (<= (+ .cse4 1) 0))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (or .cse0 .cse1 (= |c_ULTIMATE.start_cstrlcpy_#t~mem5#1| 0)) (or (<= 1 .cse2) (not .cse3)) (or .cse0 (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post4#1.base|) |c_ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) 0) .cse1) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (or (<= .cse2 |c_ULTIMATE.start_main_~length~0#1|) .cse3) (not (< |c_ULTIMATE.start_main_~length~0#1| 1)) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0)))) is different from false [2022-12-13 17:29:44,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:29:46,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:29:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:51,373 INFO L93 Difference]: Finished difference Result 182 states and 190 transitions. [2022-12-13 17:29:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-12-13 17:29:51,373 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.5) internal successors, (123), 83 states have internal predecessors, (123), 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 43 [2022-12-13 17:29:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:51,374 INFO L225 Difference]: With dead ends: 182 [2022-12-13 17:29:51,374 INFO L226 Difference]: Without dead ends: 182 [2022-12-13 17:29:51,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5108 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=2245, Invalid=24676, Unknown=143, NotChecked=326, Total=27390 [2022-12-13 17:29:51,378 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 346 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 2663 mSolverCounterSat, 68 mSolverCounterUnsat, 132 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2663 IncrementalHoareTripleChecker+Invalid, 132 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:51,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 805 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2663 Invalid, 132 Unknown, 1 Unchecked, 11.1s Time] [2022-12-13 17:29:51,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-12-13 17:29:51,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 122. [2022-12-13 17:29:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 121 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2022-12-13 17:29:51,381 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 43 [2022-12-13 17:29:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:51,381 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2022-12-13 17:29:51,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.5) internal successors, (123), 83 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2022-12-13 17:29:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 17:29:51,382 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:51,382 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:51,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 17:29:51,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 17:29:51,583 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:29:51,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash -499794139, now seen corresponding path program 7 times [2022-12-13 17:29:51,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:51,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781522863] [2022-12-13 17:29:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:51,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:52,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:52,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781522863] [2022-12-13 17:29:52,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781522863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:52,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570856770] [2022-12-13 17:29:52,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:29:52,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:52,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:52,677 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:52,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 17:29:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 133 conjunts are in the unsatisfiable core [2022-12-13 17:29:52,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:52,789 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 10 treesize of output 8 [2022-12-13 17:29:52,793 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 9 treesize of output 11 [2022-12-13 17:29:52,831 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 14 treesize of output 10 [2022-12-13 17:29:53,199 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 26 treesize of output 26 [2022-12-13 17:29:53,673 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 36 treesize of output 34 [2022-12-13 17:29:54,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-12-13 17:29:54,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2022-12-13 17:29:55,354 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 57 treesize of output 51 [2022-12-13 17:29:56,540 INFO L321 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2022-12-13 17:29:56,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 83 [2022-12-13 17:29:56,547 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 17:29:56,555 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 17:29:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 45 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:56,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:01,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:30:01,020 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 2 case distinctions, treesize of input 152 treesize of output 96 [2022-12-13 17:30:01,025 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 163 treesize of output 149 [2022-12-13 17:30:01,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 170 [2022-12-13 17:30:01,057 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 11 treesize of output 7 [2022-12-13 17:30:01,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-12-13 17:30:01,079 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 11 treesize of output 7 [2022-12-13 17:30:01,090 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 11 treesize of output 7 [2022-12-13 17:30:01,169 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 17:30:01,181 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 17:30:01,393 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 10 treesize of output 8 [2022-12-13 17:30:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 50 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:01,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570856770] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:01,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:01,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 32, 32] total 84 [2022-12-13 17:30:01,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164325442] [2022-12-13 17:30:01,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:01,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-12-13 17:30:01,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:01,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-12-13 17:30:01,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=6623, Unknown=76, NotChecked=0, Total=7140 [2022-12-13 17:30:01,424 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 85 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 85 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:30:35,997 INFO L93 Difference]: Finished difference Result 171 states and 178 transitions. [2022-12-13 17:30:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-12-13 17:30:35,997 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 85 states have internal predecessors, (127), 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 [2022-12-13 17:30:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:30:35,997 INFO L225 Difference]: With dead ends: 171 [2022-12-13 17:30:35,997 INFO L226 Difference]: Without dead ends: 93 [2022-12-13 17:30:35,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6675 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=2255, Invalid=24074, Unknown=77, NotChecked=0, Total=26406 [2022-12-13 17:30:35,999 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 711 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 2763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:30:35,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 1067 Invalid, 2763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-13 17:30:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-13 17:30:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-12-13 17:30:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 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) [2022-12-13 17:30:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-12-13 17:30:36,000 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 45 [2022-12-13 17:30:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:30:36,000 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-12-13 17:30:36,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 85 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-12-13 17:30:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 17:30:36,001 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:30:36,001 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:36,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 17:30:36,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 17:30:36,203 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:30:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2053930189, now seen corresponding path program 8 times [2022-12-13 17:30:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:36,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815080975] [2022-12-13 17:30:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:36,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:37,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815080975] [2022-12-13 17:30:37,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815080975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800698305] [2022-12-13 17:30:37,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:30:37,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:37,195 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:37,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 17:30:37,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:30:37,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:30:37,288 WARN L261 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 173 conjunts are in the unsatisfiable core [2022-12-13 17:30:37,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:37,323 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 10 treesize of output 8 [2022-12-13 17:30:37,327 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 9 treesize of output 11 [2022-12-13 17:30:37,364 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 14 treesize of output 10 [2022-12-13 17:30:37,662 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 26 treesize of output 26 [2022-12-13 17:30:37,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-12-13 17:30:44,163 INFO L321 Elim1Store]: treesize reduction 44, result has 66.7 percent of original size [2022-12-13 17:30:44,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 66 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 12 case distinctions, treesize of input 130 treesize of output 138 [2022-12-13 17:30:44,173 WARN L718 sPolynomialRelations]: Constructing 4096(two to the power of 12 dual juncts. [2022-12-13 17:30:44,396 WARN L718 sPolynomialRelations]: Constructing 2048(two to the power of 11 dual juncts. [2022-12-13 17:30:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 157 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:44,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:52,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:30:52,161 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 2 case distinctions, treesize of input 267 treesize of output 156 [2022-12-13 17:30:52,170 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 288 treesize of output 264 [2022-12-13 17:30:52,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 295 [2022-12-13 17:30:52,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 78 [2022-12-13 17:30:52,389 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 17:30:52,422 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-12-13 17:30:52,491 WARN L718 sPolynomialRelations]: Constructing 2048(two to the power of 11 dual juncts. [2022-12-13 17:30:52,594 WARN L718 sPolynomialRelations]: Constructing 4096(two to the power of 12 dual juncts. [2022-12-13 17:30:52,832 WARN L718 sPolynomialRelations]: Constructing 1024(two to the power of 10 dual juncts. [2022-12-13 17:30:52,883 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-13 17:30:52,902 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 17:30:53,130 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 10 treesize of output 8 [2022-12-13 17:30:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:53,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800698305] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:53,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:53,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 44, 44] total 107 [2022-12-13 17:30:53,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630452502] [2022-12-13 17:30:53,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:53,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-12-13 17:30:53,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-12-13 17:30:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1076, Invalid=10467, Unknown=13, NotChecked=0, Total=11556 [2022-12-13 17:30:53,164 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 108 states, 107 states have (on average 1.439252336448598) internal successors, (154), 108 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:31:31,835 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2022-12-13 17:31:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-12-13 17:31:31,835 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 1.439252336448598) internal successors, (154), 108 states have internal predecessors, (154), 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 54 [2022-12-13 17:31:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:31:31,835 INFO L225 Difference]: With dead ends: 131 [2022-12-13 17:31:31,835 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 17:31:31,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11893 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=5275, Invalid=40294, Unknown=13, NotChecked=0, Total=45582 [2022-12-13 17:31:31,838 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 666 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 2629 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:31:31,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 702 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2629 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-13 17:31:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 17:31:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 17:31:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 17:31:31,839 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2022-12-13 17:31:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:31:31,839 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 17:31:31,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 1.439252336448598) internal successors, (154), 108 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 17:31:31,839 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 17:31:31,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2022-12-13 17:31:31,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2022-12-13 17:31:31,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-12-13 17:31:31,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-12-13 17:31:31,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-12-13 17:31:31,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-12-13 17:31:31,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-12-13 17:31:31,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-12-13 17:31:31,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-12-13 17:31:31,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-12-13 17:31:31,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2022-12-13 17:31:31,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2022-12-13 17:31:31,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-12-13 17:31:31,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 17:31:32,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 17:31:32,048 INFO L445 BasicCegarLoop]: Path program histogram: [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:32,049 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 17:31:32,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 05:31:32 BoogieIcfgContainer [2022-12-13 17:31:32,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 17:31:32,052 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 17:31:32,052 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 17:31:32,052 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 17:31:32,052 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:23:56" (3/4) ... [2022-12-13 17:31:32,055 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 17:31:32,064 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-12-13 17:31:32,064 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-12-13 17:31:32,064 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-13 17:31:32,064 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 17:31:32,091 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 17:31:32,091 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 17:31:32,091 INFO L158 Benchmark]: Toolchain (without parser) took 455732.56ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 100.7MB in the beginning and 80.6MB in the end (delta: 20.1MB). Peak memory consumption was 49.4MB. Max. memory is 16.1GB. [2022-12-13 17:31:32,091 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 130.0MB. Free memory is still 91.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:31:32,092 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.74ms. Allocated memory is still 130.0MB. Free memory was 100.7MB in the beginning and 84.8MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-13 17:31:32,092 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.06ms. Allocated memory is still 130.0MB. Free memory was 84.8MB in the beginning and 82.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:31:32,092 INFO L158 Benchmark]: Boogie Preprocessor took 18.04ms. Allocated memory is still 130.0MB. Free memory was 82.9MB in the beginning and 81.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:31:32,092 INFO L158 Benchmark]: RCFGBuilder took 273.93ms. Allocated memory is still 130.0MB. Free memory was 81.2MB in the beginning and 67.8MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 17:31:32,092 INFO L158 Benchmark]: TraceAbstraction took 455063.43ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 67.2MB in the beginning and 84.6MB in the end (delta: -17.3MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2022-12-13 17:31:32,092 INFO L158 Benchmark]: Witness Printer took 39.40ms. Allocated memory is still 157.3MB. Free memory was 84.6MB in the beginning and 80.6MB in the end (delta: 3.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:31:32,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 130.0MB. Free memory is still 91.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.74ms. Allocated memory is still 130.0MB. Free memory was 100.7MB in the beginning and 84.8MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.06ms. Allocated memory is still 130.0MB. Free memory was 84.8MB in the beginning and 82.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.04ms. Allocated memory is still 130.0MB. Free memory was 82.9MB in the beginning and 81.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 273.93ms. Allocated memory is still 130.0MB. Free memory was 81.2MB in the beginning and 67.8MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 455063.43ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 67.2MB in the beginning and 84.6MB in the end (delta: -17.3MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. * Witness Printer took 39.40ms. Allocated memory is still 157.3MB. Free memory was 84.6MB in the beginning and 80.6MB in the end (delta: 3.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 567]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 38 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 455.0s, OverallIterations: 40, TraceHistogramMax: 12, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 303.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 mSolverCounterUnknown, 5601 SdHoareTripleChecker+Valid, 58.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5601 mSDsluCounter, 7426 SdHoareTripleChecker+Invalid, 56.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 55 IncrementalHoareTripleChecker+Unchecked, 6566 mSDsCounter, 601 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17098 IncrementalHoareTripleChecker+Invalid, 17968 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 601 mSolverCounterUnsat, 860 mSDtfsCounter, 17098 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1919 GetRequests, 409 SyntacticMatches, 18 SemanticMatches, 1492 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 38381 ImplicationChecksByTransitivity, 362.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=37, InterpolantAutomatonStates: 793, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 40 MinimizatonAttempts, 433 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 145.5s InterpolantComputationTime, 1248 NumberOfCodeBlocks, 1248 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1649 ConstructedInterpolants, 454 QuantifiedInterpolants, 49818 SizeOfPredicates, 417 NumberOfNonLiveVariables, 3393 ConjunctsInSsa, 1369 ConjunctsInUnsatCore, 72 InterpolantComputations, 24 PerfectInterpolantSequences, 216/1426 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 17:31:32,300 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-12-13 17:31:32,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b4ccdf-3013-40b3-a465-ccb2ce2ad39d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE