./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlen-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlen-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fa1c4f718d55e1cdd983ccc3852e93608388aa2755030644290199672f6ec657 --- 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-38b53e6 [2022-11-25 18:14:17,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:14:17,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:14:17,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:14:17,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:14:17,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:14:17,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:14:17,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:14:17,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:14:17,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:14:17,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:14:17,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:14:17,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:14:17,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:14:17,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:14:17,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:14:17,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:14:17,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:14:17,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:14:17,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:14:17,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:14:17,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:14:17,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:14:17,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:14:17,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:14:17,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:14:17,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:14:17,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:14:17,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:14:17,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:14:17,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:14:17,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:14:17,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:14:17,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:14:17,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:14:17,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:14:17,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:14:17,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:14:17,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:14:17,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:14:17,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:14:17,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-25 18:14:17,425 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:14:17,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:14:17,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:14:17,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:14:17,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:14:17,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:14:17,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:14:17,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:14:17,433 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:14:17,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:14:17,435 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:14:17,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:14:17,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:14:17,436 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:14:17,436 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:14:17,436 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:14:17,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:14:17,437 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:14:17,437 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:14:17,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:14:17,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:14:17,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:14:17,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:14:17,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:14:17,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:14:17,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:14:17,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:14:17,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:14:17,440 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:14:17,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:14:17,441 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa1c4f718d55e1cdd983ccc3852e93608388aa2755030644290199672f6ec657 [2022-11-25 18:14:17,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:14:17,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:14:17,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:14:17,846 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:14:17,847 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:14:17,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlen-alloca-2.i [2022-11-25 18:14:21,238 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:14:21,636 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:14:21,637 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlen-alloca-2.i [2022-11-25 18:14:21,650 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/data/cdeac0c21/7d39f388e92f4b159fa098a21d247a92/FLAGb6dfeb849 [2022-11-25 18:14:21,668 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/data/cdeac0c21/7d39f388e92f4b159fa098a21d247a92 [2022-11-25 18:14:21,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:14:21,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:14:21,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:14:21,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:14:21,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:14:21,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:14:21" (1/1) ... [2022-11-25 18:14:21,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264bb8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:21, skipping insertion in model container [2022-11-25 18:14:21,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:14:21" (1/1) ... [2022-11-25 18:14:21,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:14:21,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:14:22,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:14:22,235 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:14:22,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:14:22,335 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:14:22,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22 WrapperNode [2022-11-25 18:14:22,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:14:22,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:14:22,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:14:22,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:14:22,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,403 INFO L138 Inliner]: procedures = 111, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2022-11-25 18:14:22,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:14:22,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:14:22,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:14:22,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:14:22,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,462 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:14:22,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:14:22,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:14:22,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:14:22,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (1/1) ... [2022-11-25 18:14:22,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:14:22,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:14:22,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:14:22,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:14:22,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:14:22,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:14:22,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:14:22,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:14:22,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:14:22,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:14:22,688 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:14:22,690 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:14:22,924 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:14:22,931 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:14:22,931 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 18:14:22,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:14:22 BoogieIcfgContainer [2022-11-25 18:14:22,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:14:22,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:14:22,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:14:22,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:14:22,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:14:21" (1/3) ... [2022-11-25 18:14:22,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b61d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:14:22, skipping insertion in model container [2022-11-25 18:14:22,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:22" (2/3) ... [2022-11-25 18:14:22,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b61d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:14:22, skipping insertion in model container [2022-11-25 18:14:22,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:14:22" (3/3) ... [2022-11-25 18:14:22,946 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-2.i [2022-11-25 18:14:22,969 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:14:22,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-25 18:14:23,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:14:23,081 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6af6b96b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:14:23,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 18:14:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:23,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 18:14:23,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:14:23,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:14:23,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-25 18:14:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash 28693828, now seen corresponding path program 1 times [2022-11-25 18:14:23,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:14:23,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290419893] [2022-11-25 18:14:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:23,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:14:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:23,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:14:23,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290419893] [2022-11-25 18:14:23,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290419893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:23,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:23,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:14:23,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147908946] [2022-11-25 18:14:23,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:23,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:14:23,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:14:23,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:14:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:14:23,594 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:14:23,636 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-25 18:14:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:14:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 18:14:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:14:23,649 INFO L225 Difference]: With dead ends: 18 [2022-11-25 18:14:23,649 INFO L226 Difference]: Without dead ends: 16 [2022-11-25 18:14:23,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:14:23,656 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:14:23,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:14:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-25 18:14:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-25 18:14:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 15 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) [2022-11-25 18:14:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-25 18:14:23,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 5 [2022-11-25 18:14:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:14:23,695 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-25 18:14:23,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-25 18:14:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 18:14:23,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:14:23,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:14:23,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:14:23,698 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-25 18:14:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:23,699 INFO L85 PathProgramCache]: Analyzing trace with hash 28693829, now seen corresponding path program 1 times [2022-11-25 18:14:23,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:14:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462292671] [2022-11-25 18:14:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:23,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:14:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:23,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:14:23,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462292671] [2022-11-25 18:14:23,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462292671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:23,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:23,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:14:23,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357083429] [2022-11-25 18:14:23,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:24,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:14:24,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:14:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:14:24,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:14:24,003 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:14:24,036 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-25 18:14:24,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:14:24,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 18:14:24,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:14:24,039 INFO L225 Difference]: With dead ends: 28 [2022-11-25 18:14:24,039 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 18:14:24,039 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 [2022-11-25 18:14:24,041 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:14:24,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 23 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:14:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 18:14:24,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2022-11-25 18:14:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-25 18:14:24,048 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 5 [2022-11-25 18:14:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:14:24,048 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-25 18:14:24,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-25 18:14:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 18:14:24,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:14:24,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:14:24,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:14:24,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-25 18:14:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash 28695751, now seen corresponding path program 1 times [2022-11-25 18:14:24,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:14:24,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017986920] [2022-11-25 18:14:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:24,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:14:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:24,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:14:24,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017986920] [2022-11-25 18:14:24,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017986920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:24,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:24,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:14:24,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224952034] [2022-11-25 18:14:24,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:24,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:14:24,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:14:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:14:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:14:24,268 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:14:24,295 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-25 18:14:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:14:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 18:14:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:14:24,297 INFO L225 Difference]: With dead ends: 17 [2022-11-25 18:14:24,297 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 18:14:24,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:14:24,299 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:14:24,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:14:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 18:14:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-11-25 18:14:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 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) [2022-11-25 18:14:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-25 18:14:24,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2022-11-25 18:14:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:14:24,305 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-25 18:14:24,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-25 18:14:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 18:14:24,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:14:24,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:14:24,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:14:24,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-25 18:14:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1804964392, now seen corresponding path program 1 times [2022-11-25 18:14:24,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:14:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031586935] [2022-11-25 18:14:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:24,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:14:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:14:24,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031586935] [2022-11-25 18:14:24,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031586935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:24,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:24,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:14:24,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49078934] [2022-11-25 18:14:24,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:24,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:14:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:14:24,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:14:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:14:24,384 INFO L87 Difference]: Start difference. First operand 15 states and 16 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) [2022-11-25 18:14:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:14:24,423 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-11-25 18:14:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:14:24,424 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 [2022-11-25 18:14:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:14:24,425 INFO L225 Difference]: With dead ends: 14 [2022-11-25 18:14:24,425 INFO L226 Difference]: Without dead ends: 14 [2022-11-25 18:14:24,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:14:24,427 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:14:24,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 13 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:14:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-25 18:14:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-25 18:14:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-25 18:14:24,432 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2022-11-25 18:14:24,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:14:24,433 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-25 18:14:24,433 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) [2022-11-25 18:14:24,434 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-25 18:14:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 18:14:24,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:14:24,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:14:24,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:14:24,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-25 18:14:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1804964393, now seen corresponding path program 1 times [2022-11-25 18:14:24,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:14:24,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940861110] [2022-11-25 18:14:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:24,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:14:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:24,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:14:24,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940861110] [2022-11-25 18:14:24,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940861110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:24,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:24,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:14:24,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196894327] [2022-11-25 18:14:24,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:24,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:14:24,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:14:24,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:14:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:14:24,732 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2022-11-25 18:14:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:14:24,860 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-11-25 18:14:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:14:24,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 [2022-11-25 18:14:24,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:14:24,862 INFO L225 Difference]: With dead ends: 21 [2022-11-25 18:14:24,862 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 18:14:24,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:14:24,864 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:14:24,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 20 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:14:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 18:14:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-11-25 18:14:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 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) [2022-11-25 18:14:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-25 18:14:24,876 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 7 [2022-11-25 18:14:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:14:24,876 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-25 18:14:24,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2022-11-25 18:14:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-25 18:14:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 18:14:24,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:14:24,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:14:24,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:14:24,879 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-25 18:14:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1296349750, now seen corresponding path program 1 times [2022-11-25 18:14:24,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:14:24,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050475100] [2022-11-25 18:14:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:14:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:14:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050475100] [2022-11-25 18:14:25,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050475100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:25,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:25,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:14:25,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451267804] [2022-11-25 18:14:25,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:25,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:14:25,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:14:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:14:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:14:25,152 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:14:25,277 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-11-25 18:14:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:14:25,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-25 18:14:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:14:25,279 INFO L225 Difference]: With dead ends: 24 [2022-11-25 18:14:25,280 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 18:14:25,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:14:25,282 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:14:25,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 54 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:14:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 18:14:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-11-25 18:14:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-25 18:14:25,287 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2022-11-25 18:14:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:14:25,287 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-25 18:14:25,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-25 18:14:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 18:14:25,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:14:25,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:14:25,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:14:25,290 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-25 18:14:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:25,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2105696376, now seen corresponding path program 1 times [2022-11-25 18:14:25,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:14:25,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504917615] [2022-11-25 18:14:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:25,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:14:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:25,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:14:25,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504917615] [2022-11-25 18:14:25,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504917615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:14:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699068905] [2022-11-25 18:14:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:25,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:14:25,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:14:25,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:14:25,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:14:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 18:14:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:26,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 18:14:26,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:14:26,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 18:14:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:26,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:14:26,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-25 18:14:26,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-25 18:14:26,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-25 18:14:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:26,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699068905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:14:26,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:14:26,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-11-25 18:14:26,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069803095] [2022-11-25 18:14:26,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:14:26,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:14:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:14:26,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:14:26,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:14:26,777 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:14:27,480 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2022-11-25 18:14:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:14:27,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 18:14:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:14:27,481 INFO L225 Difference]: With dead ends: 33 [2022-11-25 18:14:27,482 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 18:14:27,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-11-25 18:14:27,483 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:14:27,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 53 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:14:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 18:14:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2022-11-25 18:14:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-11-25 18:14:27,487 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2022-11-25 18:14:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:14:27,488 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-11-25 18:14:27,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-11-25 18:14:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 18:14:27,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:14:27,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:14:27,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 18:14:27,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 18:14:27,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-25 18:14:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:27,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1532191887, now seen corresponding path program 1 times [2022-11-25 18:14:27,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:14:27,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456100095] [2022-11-25 18:14:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:27,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:14:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:27,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:14:27,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456100095] [2022-11-25 18:14:27,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456100095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:27,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:27,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:14:27,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424720849] [2022-11-25 18:14:27,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:27,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:14:27,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:14:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:14:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:14:27,811 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2022-11-25 18:14:27,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:14:27,829 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-11-25 18:14:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:14:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 [2022-11-25 18:14:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:14:27,834 INFO L225 Difference]: With dead ends: 22 [2022-11-25 18:14:27,838 INFO L226 Difference]: Without dead ends: 14 [2022-11-25 18:14:27,839 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 [2022-11-25 18:14:27,840 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:14:27,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:14:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-25 18:14:27,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-25 18:14:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-25 18:14:27,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-11-25 18:14:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:14:27,843 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-25 18:14:27,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2022-11-25 18:14:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-25 18:14:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 18:14:27,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:14:27,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:14:27,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:14:27,845 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-25 18:14:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1491552267, now seen corresponding path program 2 times [2022-11-25 18:14:27,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:14:27,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344386866] [2022-11-25 18:14:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:27,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:14:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:28,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:14:28,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344386866] [2022-11-25 18:14:28,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344386866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:14:28,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745108103] [2022-11-25 18:14:28,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:14:28,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:14:28,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:14:28,508 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:14:28,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:14:28,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:14:28,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:14:28,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 18:14:28,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:28,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 18:14:29,094 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-25 18:14:29,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-11-25 18:14:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:29,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:14:29,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-25 18:14:29,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-11-25 18:14:29,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-25 18:14:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:29,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745108103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:14:29,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:14:29,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-11-25 18:14:29,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795277958] [2022-11-25 18:14:29,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:14:29,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 18:14:29,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:14:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 18:14:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-11-25 18:14:29,764 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 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) [2022-11-25 18:14:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:14:31,653 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-25 18:14:31,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:14:31,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 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) Word has length 13 [2022-11-25 18:14:31,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:14:31,654 INFO L225 Difference]: With dead ends: 15 [2022-11-25 18:14:31,654 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 18:14:31,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 18:14:31,656 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:14:31,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 18:14:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 18:14:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 18:14:31,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 18:14:31,658 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2022-11-25 18:14:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:14:31,658 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 18:14:31,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 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) [2022-11-25 18:14:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 18:14:31,658 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 18:14:31,661 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2022-11-25 18:14:31,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2022-11-25 18:14:31,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2022-11-25 18:14:31,669 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2022-11-25 18:14:31,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2022-11-25 18:14:31,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:14:31,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:14:31,879 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:14:31,882 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 18:14:31,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:14:31 BoogieIcfgContainer [2022-11-25 18:14:31,887 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 18:14:31,888 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:14:31,888 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:14:31,888 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:14:31,889 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:14:22" (3/4) ... [2022-11-25 18:14:31,892 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 18:14:31,904 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-25 18:14:31,904 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-25 18:14:31,904 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-25 18:14:31,904 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 18:14:31,941 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 18:14:31,941 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:14:31,942 INFO L158 Benchmark]: Toolchain (without parser) took 10268.87ms. Allocated memory was 155.2MB in the beginning and 201.3MB in the end (delta: 46.1MB). Free memory was 123.8MB in the beginning and 103.8MB in the end (delta: 20.0MB). Peak memory consumption was 69.3MB. Max. memory is 16.1GB. [2022-11-25 18:14:31,942 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 115.3MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:14:31,943 INFO L158 Benchmark]: CACSL2BoogieTranslator took 661.53ms. Allocated memory is still 155.2MB. Free memory was 123.8MB in the beginning and 108.3MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-25 18:14:31,943 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.72ms. Allocated memory is still 155.2MB. Free memory was 108.3MB in the beginning and 106.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:14:31,944 INFO L158 Benchmark]: Boogie Preprocessor took 60.52ms. Allocated memory is still 155.2MB. Free memory was 106.6MB in the beginning and 105.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:14:31,944 INFO L158 Benchmark]: RCFGBuilder took 468.70ms. Allocated memory is still 155.2MB. Free memory was 105.0MB in the beginning and 94.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:14:31,944 INFO L158 Benchmark]: TraceAbstraction took 8950.32ms. Allocated memory was 155.2MB in the beginning and 201.3MB in the end (delta: 46.1MB). Free memory was 93.6MB in the beginning and 106.7MB in the end (delta: -13.0MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2022-11-25 18:14:31,945 INFO L158 Benchmark]: Witness Printer took 53.41ms. Allocated memory is still 201.3MB. Free memory was 106.7MB in the beginning and 103.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:14:31,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 115.3MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 661.53ms. Allocated memory is still 155.2MB. Free memory was 123.8MB in the beginning and 108.3MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.72ms. Allocated memory is still 155.2MB. Free memory was 108.3MB in the beginning and 106.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.52ms. Allocated memory is still 155.2MB. Free memory was 106.6MB in the beginning and 105.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 468.70ms. Allocated memory is still 155.2MB. Free memory was 105.0MB in the beginning and 94.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8950.32ms. Allocated memory was 155.2MB in the beginning and 201.3MB in the end (delta: 46.1MB). Free memory was 93.6MB in the beginning and 106.7MB in the end (delta: -13.0MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Witness Printer took 53.41ms. Allocated memory is still 201.3MB. Free memory was 106.7MB in the beginning and 103.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 555]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 8.8s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 293 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 293 mSDsluCounter, 248 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 165 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 275 IncrementalHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 83 mSDtfsCounter, 275 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=7, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 32 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 106 ConstructedInterpolants, 9 QuantifiedInterpolants, 1131 SizeOfPredicates, 24 NumberOfNonLiveVariables, 133 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 2/19 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-25 18:14:31,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c40d063c-bf93-4bfc-aabc-9360cb231daf/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE