./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 57855fd15a600148bf8b2d693e60ae0827a95c157ed69e07e1c42c75fda7c9c4 --- 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-dbf71c6-m [2022-10-17 11:02:24,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:02:24,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:02:24,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:02:24,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:02:24,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:02:24,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:02:24,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:02:24,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:02:24,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:02:24,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:02:24,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:02:24,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:02:24,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:02:24,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:02:24,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:02:24,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:02:24,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:02:24,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:02:24,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:02:24,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:02:24,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:02:24,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:02:24,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:02:24,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:02:24,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:02:24,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:02:24,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:02:24,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:02:24,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:02:24,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:02:24,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:02:24,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:02:24,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:02:24,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:02:24,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:02:24,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:02:24,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:02:24,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:02:24,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:02:24,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:02:24,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-17 11:02:24,382 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:02:24,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:02:24,384 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:02:24,384 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:02:24,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:02:24,385 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:02:24,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:02:24,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:02:24,386 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:02:24,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:02:24,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:02:24,392 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 11:02:24,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:02:24,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:02:24,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:02:24,393 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 11:02:24,393 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 11:02:24,394 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 11:02:24,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:02:24,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 11:02:24,394 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:02:24,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:02:24,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:02:24,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:02:24,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:02:24,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:02:24,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:02:24,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:02:24,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:02:24,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:02:24,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57855fd15a600148bf8b2d693e60ae0827a95c157ed69e07e1c42c75fda7c9c4 [2022-10-17 11:02:24,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:02:24,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:02:24,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:02:24,713 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:02:24,714 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:02:24,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2022-10-17 11:02:24,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/data/2fe13c072/50a1dc2e65694060a9e85bd5891a3f24/FLAG6e01b3a08 [2022-10-17 11:02:25,400 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:02:25,402 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2022-10-17 11:02:25,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/data/2fe13c072/50a1dc2e65694060a9e85bd5891a3f24/FLAG6e01b3a08 [2022-10-17 11:02:25,660 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/data/2fe13c072/50a1dc2e65694060a9e85bd5891a3f24 [2022-10-17 11:02:25,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:02:25,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:02:25,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:02:25,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:02:25,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:02:25,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:02:25" (1/1) ... [2022-10-17 11:02:25,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382a34a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:25, skipping insertion in model container [2022-10-17 11:02:25,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:02:25" (1/1) ... [2022-10-17 11:02:25,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:02:25,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:02:26,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:02:26,087 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:02:26,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:02:26,150 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:02:26,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26 WrapperNode [2022-10-17 11:02:26,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:02:26,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:02:26,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:02:26,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:02:26,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,193 INFO L138 Inliner]: procedures = 117, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-10-17 11:02:26,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:02:26,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:02:26,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:02:26,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:02:26,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,218 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:02:26,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:02:26,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:02:26,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:02:26,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (1/1) ... [2022-10-17 11:02:26,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:02:26,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:26,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:02:26,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:02:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 11:02:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 11:02:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 11:02:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 11:02:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:02:26,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:02:26,451 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:02:26,454 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:02:26,668 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:02:26,674 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:02:26,674 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 11:02:26,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:02:26 BoogieIcfgContainer [2022-10-17 11:02:26,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:02:26,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:02:26,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:02:26,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:02:26,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:02:25" (1/3) ... [2022-10-17 11:02:26,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47eb431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:02:26, skipping insertion in model container [2022-10-17 11:02:26,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:26" (2/3) ... [2022-10-17 11:02:26,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47eb431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:02:26, skipping insertion in model container [2022-10-17 11:02:26,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:02:26" (3/3) ... [2022-10-17 11:02:26,685 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncpy-alloca-2.i [2022-10-17 11:02:26,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:02:26,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-10-17 11:02:26,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:02:26,775 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b2e68d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:02:26,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-10-17 11:02:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 26 states have (on average 1.8076923076923077) 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) [2022-10-17 11:02:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 11:02:26,788 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:26,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:26,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:26,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:26,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029043, now seen corresponding path program 1 times [2022-10-17 11:02:26,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:26,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948134308] [2022-10-17 11:02:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:26,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:27,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:27,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948134308] [2022-10-17 11:02:27,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948134308] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:27,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:27,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:02:27,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568564422] [2022-10-17 11:02:27,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:27,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:02:27,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:27,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:02:27,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:02:27,152 INFO L87 Difference]: Start difference. First operand has 38 states, 26 states have (on average 1.8076923076923077) 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 3.5) internal successors, (7), 3 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) [2022-10-17 11:02:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:27,201 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-10-17 11:02:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:02:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2022-10-17 11:02:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:27,212 INFO L225 Difference]: With dead ends: 36 [2022-10-17 11:02:27,212 INFO L226 Difference]: Without dead ends: 34 [2022-10-17 11:02:27,214 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 [2022-10-17 11:02:27,218 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 35 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 [2022-10-17 11:02:27,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-10-17 11:02:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-10-17 11:02:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.6) internal successors, (40), 33 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) [2022-10-17 11:02:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-10-17 11:02:27,277 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 7 [2022-10-17 11:02:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:27,279 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-10-17 11:02:27,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-10-17 11:02:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-10-17 11:02:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 11:02:27,284 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:27,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:27,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:02:27,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:27,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029044, now seen corresponding path program 1 times [2022-10-17 11:02:27,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:27,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002677411] [2022-10-17 11:02:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:27,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:27,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:27,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002677411] [2022-10-17 11:02:27,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002677411] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:27,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:27,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:02:27,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995007957] [2022-10-17 11:02:27,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:27,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:02:27,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:27,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:02:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:02:27,593 INFO L87 Difference]: Start difference. First operand 34 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) [2022-10-17 11:02:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:27,652 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-10-17 11:02:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 11:02:27,653 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 [2022-10-17 11:02:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:27,655 INFO L225 Difference]: With dead ends: 33 [2022-10-17 11:02:27,656 INFO L226 Difference]: Without dead ends: 33 [2022-10-17 11:02:27,661 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 [2022-10-17 11:02:27,664 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:27,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 29 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-17 11:02:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-17 11:02:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.56) internal successors, (39), 32 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) [2022-10-17 11:02:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-10-17 11:02:27,676 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 7 [2022-10-17 11:02:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:27,676 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-10-17 11:02:27,678 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) [2022-10-17 11:02:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-10-17 11:02:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 11:02:27,680 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:27,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:27,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:02:27,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:27,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2022-10-17 11:02:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:27,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552095753] [2022-10-17 11:02:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:27,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:27,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552095753] [2022-10-17 11:02:27,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552095753] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:27,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:27,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:02:27,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614167228] [2022-10-17 11:02:27,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:27,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:02:27,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:27,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:02:27,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:02:27,824 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 1.75) 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) [2022-10-17 11:02:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:27,859 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-10-17 11:02:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 11:02:27,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) 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 [2022-10-17 11:02:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:27,867 INFO L225 Difference]: With dead ends: 59 [2022-10-17 11:02:27,867 INFO L226 Difference]: Without dead ends: 59 [2022-10-17 11:02:27,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:02:27,870 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:27,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 70 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-17 11:02:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2022-10-17 11:02:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 35 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) [2022-10-17 11:02:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-10-17 11:02:27,884 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 7 [2022-10-17 11:02:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:27,884 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-10-17 11:02:27,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) 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) [2022-10-17 11:02:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-10-17 11:02:27,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 11:02:27,885 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:27,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:27,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 11:02:27,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:27,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-10-17 11:02:27,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:27,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610874131] [2022-10-17 11:02:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:27,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:28,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:28,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610874131] [2022-10-17 11:02:28,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610874131] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:28,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:28,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:02:28,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252387238] [2022-10-17 11:02:28,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:28,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:02:28,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:28,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:02:28,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:02:28,114 INFO L87 Difference]: Start difference. First operand 36 states and 43 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) [2022-10-17 11:02:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:28,212 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-10-17 11:02:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 11:02:28,213 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 [2022-10-17 11:02:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:28,217 INFO L225 Difference]: With dead ends: 63 [2022-10-17 11:02:28,218 INFO L226 Difference]: Without dead ends: 63 [2022-10-17 11:02:28,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:02:28,229 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 64 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:28,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 73 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:02:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-10-17 11:02:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2022-10-17 11:02:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 37 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) [2022-10-17 11:02:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-10-17 11:02:28,235 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 7 [2022-10-17 11:02:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:28,236 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-10-17 11:02:28,236 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) [2022-10-17 11:02:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-10-17 11:02:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 11:02:28,237 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:28,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:28,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 11:02:28,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1954751785, now seen corresponding path program 1 times [2022-10-17 11:02:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:28,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499367113] [2022-10-17 11:02:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:28,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:28,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:28,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499367113] [2022-10-17 11:02:28,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499367113] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:28,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:28,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:02:28,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107714169] [2022-10-17 11:02:28,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:28,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 11:02:28,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 11:02:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:02:28,387 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:28,479 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-10-17 11:02:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:02:28,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-10-17 11:02:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:28,482 INFO L225 Difference]: With dead ends: 39 [2022-10-17 11:02:28,483 INFO L226 Difference]: Without dead ends: 39 [2022-10-17 11:02:28,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:02:28,485 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:28,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 67 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:28,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-10-17 11:02:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-10-17 11:02:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.5) 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) [2022-10-17 11:02:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-10-17 11:02:28,496 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 11 [2022-10-17 11:02:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:28,497 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-10-17 11:02:28,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-10-17 11:02:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 11:02:28,499 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:28,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:28,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 11:02:28,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1954751784, now seen corresponding path program 1 times [2022-10-17 11:02:28,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:28,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618572590] [2022-10-17 11:02:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:28,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:28,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:28,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618572590] [2022-10-17 11:02:28,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618572590] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:28,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:28,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 11:02:28,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765134215] [2022-10-17 11:02:28,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:28,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 11:02:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:28,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 11:02:28,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 11:02:28,765 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:28,891 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-10-17 11:02:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:02:28,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-10-17 11:02:28,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:28,896 INFO L225 Difference]: With dead ends: 43 [2022-10-17 11:02:28,896 INFO L226 Difference]: Without dead ends: 43 [2022-10-17 11:02:28,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-17 11:02:28,898 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 144 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:28,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 83 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:02:28,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-10-17 11:02:28,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2022-10-17 11:02:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.46875) internal successors, (47), 38 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) [2022-10-17 11:02:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-10-17 11:02:28,912 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-10-17 11:02:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:28,913 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-10-17 11:02:28,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-10-17 11:02:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 11:02:28,914 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:28,914 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:28,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 11:02:28,915 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-10-17 11:02:28,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:28,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179546919] [2022-10-17 11:02:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:29,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:29,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179546919] [2022-10-17 11:02:29,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179546919] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:29,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663881234] [2022-10-17 11:02:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:29,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:29,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:29,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:29,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:02:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:29,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 11:02:29,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:29,319 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 11:02:29,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:29,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:29,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663881234] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:02:29,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:02:29,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-10-17 11:02:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546759075] [2022-10-17 11:02:29,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:02:29,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 11:02:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:29,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 11:02:29,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-10-17 11:02:29,529 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:29,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:29,699 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-10-17 11:02:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:02:29,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 11 [2022-10-17 11:02:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:29,701 INFO L225 Difference]: With dead ends: 89 [2022-10-17 11:02:29,701 INFO L226 Difference]: Without dead ends: 89 [2022-10-17 11:02:29,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-10-17 11:02:29,702 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 165 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:29,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 201 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:02:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-17 11:02:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 36. [2022-10-17 11:02:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 35 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) [2022-10-17 11:02:29,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-10-17 11:02:29,707 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 11 [2022-10-17 11:02:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:29,707 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-10-17 11:02:29,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-10-17 11:02:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 11:02:29,708 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:29,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:29,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 11:02:29,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 11:02:29,928 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:29,928 INFO L85 PathProgramCache]: Analyzing trace with hash -466410634, now seen corresponding path program 1 times [2022-10-17 11:02:29,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:29,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238225131] [2022-10-17 11:02:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:29,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:30,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:30,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238225131] [2022-10-17 11:02:30,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238225131] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:30,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:30,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:02:30,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722364181] [2022-10-17 11:02:30,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:30,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:02:30,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:30,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:02:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:02:30,009 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.0) 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) [2022-10-17 11:02:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:30,043 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-10-17 11:02:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 11:02:30,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) 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 [2022-10-17 11:02:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:30,045 INFO L225 Difference]: With dead ends: 73 [2022-10-17 11:02:30,045 INFO L226 Difference]: Without dead ends: 73 [2022-10-17 11:02:30,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:02:30,047 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 42 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:30,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 108 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-17 11:02:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2022-10-17 11:02:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.35) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-10-17 11:02:30,060 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 12 [2022-10-17 11:02:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:30,060 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-10-17 11:02:30,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) 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) [2022-10-17 11:02:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-10-17 11:02:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 11:02:30,067 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:30,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:30,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 11:02:30,067 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash -467763174, now seen corresponding path program 1 times [2022-10-17 11:02:30,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:30,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322330238] [2022-10-17 11:02:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:30,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:30,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322330238] [2022-10-17 11:02:30,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322330238] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:30,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:30,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 11:02:30,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194290137] [2022-10-17 11:02:30,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:30,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:02:30,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:02:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:02:30,229 INFO L87 Difference]: Start difference. First operand 46 states and 54 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) [2022-10-17 11:02:30,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:30,310 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-10-17 11:02:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:02:30,310 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 [2022-10-17 11:02:30,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:30,311 INFO L225 Difference]: With dead ends: 47 [2022-10-17 11:02:30,311 INFO L226 Difference]: Without dead ends: 47 [2022-10-17 11:02:30,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-17 11:02:30,314 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:30,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 64 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:02:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-17 11:02:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-10-17 11:02:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 44 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) [2022-10-17 11:02:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-10-17 11:02:30,318 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 12 [2022-10-17 11:02:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:30,318 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-10-17 11:02:30,318 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) [2022-10-17 11:02:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-10-17 11:02:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 11:02:30,319 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:30,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 11:02:30,320 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash -467763173, now seen corresponding path program 1 times [2022-10-17 11:02:30,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:30,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355159491] [2022-10-17 11:02:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:30,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:30,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:30,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355159491] [2022-10-17 11:02:30,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355159491] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:30,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:30,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 11:02:30,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936898227] [2022-10-17 11:02:30,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:30,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:02:30,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:02:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:02:30,527 INFO L87 Difference]: Start difference. First operand 45 states and 53 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) [2022-10-17 11:02:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:30,631 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-10-17 11:02:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:02:30,631 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 [2022-10-17 11:02:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:30,632 INFO L225 Difference]: With dead ends: 47 [2022-10-17 11:02:30,632 INFO L226 Difference]: Without dead ends: 47 [2022-10-17 11:02:30,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-17 11:02:30,633 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:30,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 84 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-17 11:02:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-10-17 11:02:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-10-17 11:02:30,642 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 12 [2022-10-17 11:02:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:30,643 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-10-17 11:02:30,643 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) [2022-10-17 11:02:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-10-17 11:02:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 11:02:30,645 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:30,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:30,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 11:02:30,645 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:30,646 INFO L85 PathProgramCache]: Analyzing trace with hash 213647736, now seen corresponding path program 1 times [2022-10-17 11:02:30,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:30,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460410937] [2022-10-17 11:02:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:30,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:30,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:30,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460410937] [2022-10-17 11:02:30,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460410937] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:30,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:30,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:02:30,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931405705] [2022-10-17 11:02:30,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:30,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:02:30,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:02:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:02:30,736 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2022-10-17 11:02:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:30,759 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-10-17 11:02:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:02:30,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2022-10-17 11:02:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:30,760 INFO L225 Difference]: With dead ends: 49 [2022-10-17 11:02:30,760 INFO L226 Difference]: Without dead ends: 49 [2022-10-17 11:02:30,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:02:30,761 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:30,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 59 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-17 11:02:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2022-10-17 11:02:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 35 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) [2022-10-17 11:02:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-10-17 11:02:30,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 12 [2022-10-17 11:02:30,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:30,764 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-10-17 11:02:30,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) 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) [2022-10-17 11:02:30,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-10-17 11:02:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 11:02:30,766 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:30,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:30,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 11:02:30,766 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:30,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:30,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1302901600, now seen corresponding path program 1 times [2022-10-17 11:02:30,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:30,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673826267] [2022-10-17 11:02:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:30,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:30,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673826267] [2022-10-17 11:02:30,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673826267] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:30,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:30,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:02:30,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484222760] [2022-10-17 11:02:30,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:30,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:02:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:30,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:02:30,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:02:30,851 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:30,898 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-10-17 11:02:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:02:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-17 11:02:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:30,899 INFO L225 Difference]: With dead ends: 35 [2022-10-17 11:02:30,899 INFO L226 Difference]: Without dead ends: 35 [2022-10-17 11:02:30,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:02:30,900 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:30,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 76 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-17 11:02:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-17 11:02:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 34 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) [2022-10-17 11:02:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-10-17 11:02:30,903 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2022-10-17 11:02:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:30,903 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-10-17 11:02:30,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-10-17 11:02:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 11:02:30,906 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:30,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:30,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 11:02:30,907 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1302901599, now seen corresponding path program 1 times [2022-10-17 11:02:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:30,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854755626] [2022-10-17 11:02:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:31,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:31,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854755626] [2022-10-17 11:02:31,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854755626] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:31,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:31,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:02:31,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477492702] [2022-10-17 11:02:31,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:31,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:02:31,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:31,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:02:31,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:02:31,065 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:31,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:31,120 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-10-17 11:02:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:02:31,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-17 11:02:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:31,123 INFO L225 Difference]: With dead ends: 69 [2022-10-17 11:02:31,123 INFO L226 Difference]: Without dead ends: 69 [2022-10-17 11:02:31,123 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 [2022-10-17 11:02:31,124 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 31 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:31,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-10-17 11:02:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-10-17 11:02:31,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-10-17 11:02:31,132 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 16 [2022-10-17 11:02:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:31,132 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-10-17 11:02:31,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-10-17 11:02:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 11:02:31,134 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:31,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:31,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 11:02:31,134 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:31,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:31,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1889707613, now seen corresponding path program 1 times [2022-10-17 11:02:31,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:31,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137049156] [2022-10-17 11:02:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:31,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:31,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:31,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137049156] [2022-10-17 11:02:31,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137049156] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:31,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:31,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 11:02:31,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141448189] [2022-10-17 11:02:31,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:31,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 11:02:31,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:31,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 11:02:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-10-17 11:02:31,559 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:31,779 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-10-17 11:02:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 11:02:31,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-17 11:02:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:31,781 INFO L225 Difference]: With dead ends: 57 [2022-10-17 11:02:31,781 INFO L226 Difference]: Without dead ends: 57 [2022-10-17 11:02:31,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-10-17 11:02:31,782 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:31,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 110 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:02:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-17 11:02:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-10-17 11:02:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 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) [2022-10-17 11:02:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-10-17 11:02:31,787 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 16 [2022-10-17 11:02:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:31,787 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-10-17 11:02:31,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-10-17 11:02:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 11:02:31,790 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:31,790 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:31,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 11:02:31,791 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:31,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1717205610, now seen corresponding path program 1 times [2022-10-17 11:02:31,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:31,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111345034] [2022-10-17 11:02:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:31,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:31,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:31,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111345034] [2022-10-17 11:02:31,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111345034] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:31,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:31,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:02:31,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583004094] [2022-10-17 11:02:31,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:31,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:02:31,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:31,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:02:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:02:31,938 INFO L87 Difference]: Start difference. First operand 55 states and 65 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) [2022-10-17 11:02:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:31,981 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-10-17 11:02:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:02:31,982 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 [2022-10-17 11:02:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:31,982 INFO L225 Difference]: With dead ends: 61 [2022-10-17 11:02:31,982 INFO L226 Difference]: Without dead ends: 61 [2022-10-17 11:02:31,984 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 [2022-10-17 11:02:31,985 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:31,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 112 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-17 11:02:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2022-10-17 11:02:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 56 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) [2022-10-17 11:02:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-10-17 11:02:31,988 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 17 [2022-10-17 11:02:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:31,989 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-10-17 11:02:31,989 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) [2022-10-17 11:02:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-10-17 11:02:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 11:02:31,989 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:31,990 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:31,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 11:02:31,990 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:31,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1566644436, now seen corresponding path program 1 times [2022-10-17 11:02:31,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:31,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279636730] [2022-10-17 11:02:31,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:31,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:32,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:32,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279636730] [2022-10-17 11:02:32,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279636730] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:32,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:32,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 11:02:32,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131053098] [2022-10-17 11:02:32,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:32,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 11:02:32,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 11:02:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:02:32,230 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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) [2022-10-17 11:02:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:32,399 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2022-10-17 11:02:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 11:02:32,399 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 [2022-10-17 11:02:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:32,400 INFO L225 Difference]: With dead ends: 85 [2022-10-17 11:02:32,400 INFO L226 Difference]: Without dead ends: 85 [2022-10-17 11:02:32,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-10-17 11:02:32,401 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:32,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 170 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:02:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-10-17 11:02:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 71. [2022-10-17 11:02:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.208955223880597) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-10-17 11:02:32,405 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 17 [2022-10-17 11:02:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:32,405 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-10-17 11:02:32,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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) [2022-10-17 11:02:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-10-17 11:02:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 11:02:32,406 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:32,406 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:32,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-17 11:02:32,406 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:32,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:32,407 INFO L85 PathProgramCache]: Analyzing trace with hash 286780758, now seen corresponding path program 1 times [2022-10-17 11:02:32,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:32,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841037976] [2022-10-17 11:02:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:32,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:32,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:32,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841037976] [2022-10-17 11:02:32,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841037976] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:32,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:32,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 11:02:32,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770552779] [2022-10-17 11:02:32,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:32,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 11:02:32,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 11:02:32,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-10-17 11:02:32,680 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2022-10-17 11:02:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:32,865 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-10-17 11:02:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 11:02:32,866 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 [2022-10-17 11:02:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:32,866 INFO L225 Difference]: With dead ends: 107 [2022-10-17 11:02:32,866 INFO L226 Difference]: Without dead ends: 107 [2022-10-17 11:02:32,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-10-17 11:02:32,867 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 79 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:32,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 176 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:02:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-10-17 11:02:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2022-10-17 11:02:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-10-17 11:02:32,871 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 17 [2022-10-17 11:02:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:32,871 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-10-17 11:02:32,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2022-10-17 11:02:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-10-17 11:02:32,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 11:02:32,872 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:32,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:32,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-17 11:02:32,872 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:32,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2041976217, now seen corresponding path program 1 times [2022-10-17 11:02:32,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:32,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707562228] [2022-10-17 11:02:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:32,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:33,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:33,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707562228] [2022-10-17 11:02:33,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707562228] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:33,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:33,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:02:33,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202187094] [2022-10-17 11:02:33,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:33,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:02:33,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:02:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:02:33,026 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:33,041 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-10-17 11:02:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 11:02:33,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-10-17 11:02:33,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:33,042 INFO L225 Difference]: With dead ends: 72 [2022-10-17 11:02:33,042 INFO L226 Difference]: Without dead ends: 43 [2022-10-17 11:02:33,043 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 [2022-10-17 11:02:33,043 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:33,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:02:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-10-17 11:02:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-10-17 11:02:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.2) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-10-17 11:02:33,045 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 18 [2022-10-17 11:02:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:33,046 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-10-17 11:02:33,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-10-17 11:02:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 11:02:33,046 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:33,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:33,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-17 11:02:33,047 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:33,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2012971173, now seen corresponding path program 1 times [2022-10-17 11:02:33,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:33,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964339734] [2022-10-17 11:02:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:33,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:33,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964339734] [2022-10-17 11:02:33,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964339734] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505646571] [2022-10-17 11:02:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:33,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:33,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:33,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:33,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 11:02:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:33,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 61 conjunts are in the unsatisfiable core [2022-10-17 11:02:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:33,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:02:33,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:33,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:34,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:34,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505646571] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:02:34,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:02:34,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-10-17 11:02:34,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376085480] [2022-10-17 11:02:34,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:02:34,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-17 11:02:34,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:34,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-17 11:02:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-10-17 11:02:34,769 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 29 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) [2022-10-17 11:02:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:36,843 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-10-17 11:02:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-10-17 11:02:36,843 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 29 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 20 [2022-10-17 11:02:36,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:36,844 INFO L225 Difference]: With dead ends: 84 [2022-10-17 11:02:36,844 INFO L226 Difference]: Without dead ends: 61 [2022-10-17 11:02:36,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=432, Invalid=2648, Unknown=0, NotChecked=0, Total=3080 [2022-10-17 11:02:36,846 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 113 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:36,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 252 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 11:02:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-17 11:02:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2022-10-17 11:02:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 51 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) [2022-10-17 11:02:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-10-17 11:02:36,849 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 20 [2022-10-17 11:02:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:36,849 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-10-17 11:02:36,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 29 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) [2022-10-17 11:02:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-10-17 11:02:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 11:02:36,850 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:36,850 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] [2022-10-17 11:02:36,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 11:02:37,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:37,051 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:37,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:37,051 INFO L85 PathProgramCache]: Analyzing trace with hash -718716967, now seen corresponding path program 1 times [2022-10-17 11:02:37,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:37,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695867186] [2022-10-17 11:02:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:37,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:37,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:37,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695867186] [2022-10-17 11:02:37,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695867186] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:37,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525954111] [2022-10-17 11:02:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:37,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:37,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:37,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:37,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 11:02:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:37,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-17 11:02:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:37,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:37,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:37,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525954111] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:02:37,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:02:37,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-10-17 11:02:37,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521899812] [2022-10-17 11:02:37,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:02:37,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-17 11:02:37,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:37,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-17 11:02:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-10-17 11:02:37,794 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 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) [2022-10-17 11:02:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:38,085 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-10-17 11:02:38,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 11:02:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 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) Word has length 21 [2022-10-17 11:02:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:38,086 INFO L225 Difference]: With dead ends: 56 [2022-10-17 11:02:38,086 INFO L226 Difference]: Without dead ends: 56 [2022-10-17 11:02:38,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2022-10-17 11:02:38,087 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 255 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:38,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 95 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:02:38,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-17 11:02:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-10-17 11:02:38,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 51 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) [2022-10-17 11:02:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-10-17 11:02:38,090 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 21 [2022-10-17 11:02:38,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:38,090 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-10-17 11:02:38,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 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) [2022-10-17 11:02:38,091 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-10-17 11:02:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 11:02:38,091 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:38,091 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] [2022-10-17 11:02:38,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 11:02:38,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:38,292 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:38,293 INFO L85 PathProgramCache]: Analyzing trace with hash -805389510, now seen corresponding path program 1 times [2022-10-17 11:02:38,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:38,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98697607] [2022-10-17 11:02:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:38,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:02:38,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:38,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98697607] [2022-10-17 11:02:38,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98697607] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:38,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831001161] [2022-10-17 11:02:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:38,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:38,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:38,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:38,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 11:02:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:38,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 42 conjunts are in the unsatisfiable core [2022-10-17 11:02:38,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:02:38,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:38,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:02:39,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:39,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 11:02:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:02:39,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831001161] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:02:39,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:02:39,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-10-17 11:02:39,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947606033] [2022-10-17 11:02:39,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:02:39,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-10-17 11:02:39,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-10-17 11:02:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-10-17 11:02:39,574 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:39,952 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-10-17 11:02:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 11:02:39,952 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2022-10-17 11:02:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:39,953 INFO L225 Difference]: With dead ends: 52 [2022-10-17 11:02:39,953 INFO L226 Difference]: Without dead ends: 52 [2022-10-17 11:02:39,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-10-17 11:02:39,954 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:39,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 113 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:02:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-10-17 11:02:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-10-17 11:02:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-10-17 11:02:39,957 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 22 [2022-10-17 11:02:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:39,957 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-10-17 11:02:39,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-10-17 11:02:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 11:02:39,958 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:39,958 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:39,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 11:02:40,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:40,168 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:40,169 INFO L85 PathProgramCache]: Analyzing trace with hash -279519168, now seen corresponding path program 1 times [2022-10-17 11:02:40,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:40,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229515800] [2022-10-17 11:02:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:40,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:02:40,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:40,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229515800] [2022-10-17 11:02:40,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229515800] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:40,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513967857] [2022-10-17 11:02:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:40,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:40,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:40,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:40,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 11:02:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:40,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 61 conjunts are in the unsatisfiable core [2022-10-17 11:02:40,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:02:40,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:40,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:02:41,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:02:41,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513967857] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:02:41,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:02:41,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-10-17 11:02:41,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161567702] [2022-10-17 11:02:41,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:02:41,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-17 11:02:41,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:41,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-17 11:02:41,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-10-17 11:02:41,837 INFO L87 Difference]: Start difference. First operand 52 states and 59 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) [2022-10-17 11:02:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:42,934 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-10-17 11:02:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 11:02:42,937 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 26 [2022-10-17 11:02:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:42,938 INFO L225 Difference]: With dead ends: 51 [2022-10-17 11:02:42,938 INFO L226 Difference]: Without dead ends: 37 [2022-10-17 11:02:42,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2022-10-17 11:02:42,940 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:42,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 227 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 11:02:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-17 11:02:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-10-17 11:02:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:02:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-10-17 11:02:42,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2022-10-17 11:02:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:42,942 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-10-17 11:02:42,942 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) [2022-10-17 11:02:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-10-17 11:02:42,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 11:02:42,943 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:42,943 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:42,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 11:02:43,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-10-17 11:02:43,155 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:43,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash -57121321, now seen corresponding path program 2 times [2022-10-17 11:02:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117346599] [2022-10-17 11:02:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:43,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:43,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:43,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117346599] [2022-10-17 11:02:43,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117346599] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:43,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189049443] [2022-10-17 11:02:43,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:02:43,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:43,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:43,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:43,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 11:02:43,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 11:02:43,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:02:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 57 conjunts are in the unsatisfiable core [2022-10-17 11:02:43,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:43,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:43,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:44,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:44,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 11:02:44,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:44,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:45,158 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_280 (Array Int Int)) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27| Int)) (or (<= (+ 3 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27|) (select |c_#length| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_280) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27| 1)) 0) (not (<= |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27| |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)))) is different from false [2022-10-17 11:02:45,189 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_280 (Array Int Int)) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_280) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27| 1)) 0) (not (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27|)) (< |c_ULTIMATE.start_cstrncpy_~src#1.offset| |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27|) (<= (+ 3 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27|) (select |c_#length| |c_ULTIMATE.start_cstrncpy_~src#1.base|)))) is different from false [2022-10-17 11:02:45,209 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_280 (Array Int Int)) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_280) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27| 1)) 0) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27|) (<= (+ 3 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_27|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)))) is different from false [2022-10-17 11:02:45,237 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 11:02:45,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:45,251 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 11:02:45,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 [2022-10-17 11:02:45,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:45,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-10-17 11:02:45,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189049443] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:02:45,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:02:45,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2022-10-17 11:02:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292527926] [2022-10-17 11:02:45,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:02:45,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-10-17 11:02:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-10-17 11:02:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1079, Unknown=3, NotChecked=204, Total=1406 [2022-10-17 11:02:45,407 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 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) [2022-10-17 11:02:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:46,390 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-10-17 11:02:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-17 11:02:46,391 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 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 [2022-10-17 11:02:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:46,391 INFO L225 Difference]: With dead ends: 58 [2022-10-17 11:02:46,391 INFO L226 Difference]: Without dead ends: 45 [2022-10-17 11:02:46,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=259, Invalid=2200, Unknown=3, NotChecked=294, Total=2756 [2022-10-17 11:02:46,393 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:46,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 260 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 218 Unchecked, 0.1s Time] [2022-10-17 11:02:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-17 11:02:46,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-10-17 11:02:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 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) [2022-10-17 11:02:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-10-17 11:02:46,395 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 27 [2022-10-17 11:02:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:46,395 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-10-17 11:02:46,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 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) [2022-10-17 11:02:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-10-17 11:02:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-17 11:02:46,396 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:46,396 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:46,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 11:02:46,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:46,607 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash 614687385, now seen corresponding path program 2 times [2022-10-17 11:02:46,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:46,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789909075] [2022-10-17 11:02:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:46,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 11:02:47,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:47,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789909075] [2022-10-17 11:02:47,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789909075] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:47,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044678448] [2022-10-17 11:02:47,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:02:47,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:47,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:47,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:47,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 11:02:47,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 11:02:47,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:02:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 61 conjunts are in the unsatisfiable core [2022-10-17 11:02:47,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:47,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:02:47,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:47,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 11:02:47,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 11:02:48,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044678448] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:02:48,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:02:48,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-10-17 11:02:48,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30347924] [2022-10-17 11:02:48,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:02:48,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-17 11:02:48,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-17 11:02:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-10-17 11:02:48,575 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 33 states, 32 states have (on average 2.09375) internal successors, (67), 33 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) [2022-10-17 11:02:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:49,855 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-10-17 11:02:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-17 11:02:49,855 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.09375) internal successors, (67), 33 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) Word has length 32 [2022-10-17 11:02:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:49,856 INFO L225 Difference]: With dead ends: 54 [2022-10-17 11:02:49,856 INFO L226 Difference]: Without dead ends: 54 [2022-10-17 11:02:49,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2022-10-17 11:02:49,858 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:49,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 179 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 11:02:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-10-17 11:02:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-10-17 11:02:49,861 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) [2022-10-17 11:02:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-10-17 11:02:49,862 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 32 [2022-10-17 11:02:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:49,862 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-10-17 11:02:49,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.09375) internal successors, (67), 33 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) [2022-10-17 11:02:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-10-17 11:02:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 11:02:49,863 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:49,863 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:49,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 11:02:50,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:50,077 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-17 11:02:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1981775400, now seen corresponding path program 3 times [2022-10-17 11:02:50,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:50,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818757963] [2022-10-17 11:02:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:50,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:50,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:50,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818757963] [2022-10-17 11:02:50,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818757963] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:50,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103595245] [2022-10-17 11:02:50,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 11:02:50,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:50,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:50,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:50,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a84a25a-fc2f-4660-b445-5e16ca89c367/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 11:02:50,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 11:02:50,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:02:50,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 81 conjunts are in the unsatisfiable core [2022-10-17 11:02:50,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:51,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 11:02:51,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:02:51,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-10-17 11:02:51,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:02:51,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-10-17 11:02:51,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 11:02:51,884 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 11:02:51,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-10-17 11:02:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:51,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:53,656 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncpy_~d~0#1.base_45| Int) (v_ArrVal_353 Int) (v_ArrVal_351 Int)) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_cstrncpy_~d~0#1.base_45| (store (store (select |c_#memory_int| |v_ULTIMATE.start_cstrncpy_~d~0#1.base_45|) |c_ULTIMATE.start_cstrncpy_~d~0#1.offset| v_ArrVal_351) (+ |c_ULTIMATE.start_cstrncpy_~d~0#1.offset| 1) v_ArrVal_353)) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false