./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 17:22:16,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:22:16,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:22:16,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:22:16,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:22:16,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:22:16,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:22:16,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:22:16,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:22:16,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:22:16,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:22:16,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:22:16,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:22:16,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:22:16,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:22:16,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:22:16,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:22:16,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:22:16,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:22:16,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:22:16,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:22:16,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:22:16,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:22:16,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:22:16,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:22:16,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:22:16,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:22:16,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:22:16,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:22:16,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:22:16,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:22:16,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:22:16,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:22:16,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:22:16,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:22:16,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:22:16,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:22:16,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:22:16,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:22:16,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:22:16,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:22:16,448 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 17:22:16,473 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:22:16,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:22:16,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:22:16,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:22:16,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:22:16,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:22:16,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:22:16,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:22:16,481 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:22:16,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:22:16,482 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:22:16,482 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 17:22:16,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:22:16,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:22:16,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:22:16,483 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 17:22:16,483 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 17:22:16,483 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 17:22:16,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:22:16,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 17:22:16,484 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:22:16,484 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:22:16,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:22:16,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:22:16,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:22:16,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:22:16,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:22:16,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:22:16,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:22:16,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:22:16,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef [2022-11-21 17:22:16,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:22:16,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:22:16,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:22:16,825 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:22:16,825 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:22:16,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i [2022-11-21 17:22:19,932 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:22:20,256 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:22:20,257 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i [2022-11-21 17:22:20,271 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/data/f27432bfb/7efc1f996d9d4f1787c9cd2d9ef5c4ef/FLAG7068abbff [2022-11-21 17:22:20,286 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/data/f27432bfb/7efc1f996d9d4f1787c9cd2d9ef5c4ef [2022-11-21 17:22:20,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:22:20,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:22:20,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:22:20,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:22:20,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:22:20,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:22:20" (1/1) ... [2022-11-21 17:22:20,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27175883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:20, skipping insertion in model container [2022-11-21 17:22:20,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:22:20" (1/1) ... [2022-11-21 17:22:20,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:22:20,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:22:20,926 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i[41322,41335] [2022-11-21 17:22:20,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:22:20,980 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:22:21,034 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i[41322,41335] [2022-11-21 17:22:21,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:22:21,132 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:22:21,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21 WrapperNode [2022-11-21 17:22:21,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:22:21,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:22:21,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:22:21,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:22:21,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,217 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2022-11-21 17:22:21,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:22:21,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:22:21,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:22:21,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:22:21,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,268 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:22:21,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:22:21,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:22:21,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:22:21,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (1/1) ... [2022-11-21 17:22:21,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:22:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:22:21,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:22:21,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:22:21,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:22:21,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:22:21,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:22:21,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:22:21,374 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 17:22:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:22:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-21 17:22:21,375 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-21 17:22:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:22:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:22:21,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:22:21,377 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 17:22:21,575 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:22:21,577 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:22:21,871 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:22:21,879 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:22:21,880 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-21 17:22:21,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:22:21 BoogieIcfgContainer [2022-11-21 17:22:21,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:22:21,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:22:21,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:22:21,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:22:21,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:22:20" (1/3) ... [2022-11-21 17:22:21,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d41c63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:22:21, skipping insertion in model container [2022-11-21 17:22:21,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:22:21" (2/3) ... [2022-11-21 17:22:21,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d41c63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:22:21, skipping insertion in model container [2022-11-21 17:22:21,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:22:21" (3/3) ... [2022-11-21 17:22:21,898 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2022-11-21 17:22:21,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:22:21,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-21 17:22:21,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 17:22:22,004 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-21 17:22:22,038 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 17:22:22,054 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 134 transitions, 276 flow [2022-11-21 17:22:22,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 134 transitions, 276 flow [2022-11-21 17:22:22,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 134 transitions, 276 flow [2022-11-21 17:22:22,193 INFO L130 PetriNetUnfolder]: 23/186 cut-off events. [2022-11-21 17:22:22,193 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 17:22:22,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 186 events. 23/186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 471 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-11-21 17:22:22,204 INFO L119 LiptonReduction]: Number of co-enabled transitions 3248 [2022-11-21 17:22:27,117 INFO L134 LiptonReduction]: Checked pairs total: 5465 [2022-11-21 17:22:27,118 INFO L136 LiptonReduction]: Total number of compositions: 129 [2022-11-21 17:22:27,126 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 39 transitions, 86 flow [2022-11-21 17:22:27,156 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 197 states, 182 states have (on average 2.697802197802198) internal successors, (491), 196 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:27,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:22:27,182 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4082e699, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:22:27,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 17:22:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 182 states have (on average 2.697802197802198) internal successors, (491), 196 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 17:22:27,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:27,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 17:22:27,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:27,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:27,198 INFO L85 PathProgramCache]: Analyzing trace with hash 16618, now seen corresponding path program 1 times [2022-11-21 17:22:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:27,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752694030] [2022-11-21 17:22:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:27,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:27,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:27,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752694030] [2022-11-21 17:22:27,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752694030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:27,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:27,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:22:27,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926583344] [2022-11-21 17:22:27,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:27,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:22:27,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:22:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:27,560 INFO L87 Difference]: Start difference. First operand has 197 states, 182 states have (on average 2.697802197802198) internal successors, (491), 196 states have internal predecessors, (491), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:27,702 INFO L93 Difference]: Finished difference Result 175 states and 321 transitions. [2022-11-21 17:22:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-21 17:22:27,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:27,715 INFO L225 Difference]: With dead ends: 175 [2022-11-21 17:22:27,730 INFO L226 Difference]: Without dead ends: 164 [2022-11-21 17:22:27,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:27,734 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:27,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:22:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-21 17:22:27,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-11-21 17:22:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 155 states have (on average 1.9419354838709677) internal successors, (301), 163 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 301 transitions. [2022-11-21 17:22:27,786 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 301 transitions. Word has length 2 [2022-11-21 17:22:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:27,787 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 301 transitions. [2022-11-21 17:22:27,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 301 transitions. [2022-11-21 17:22:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 17:22:27,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:27,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 17:22:27,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:22:27,789 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash 16620, now seen corresponding path program 1 times [2022-11-21 17:22:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:27,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492733596] [2022-11-21 17:22:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:27,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:27,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:27,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492733596] [2022-11-21 17:22:27,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492733596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:27,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:27,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:22:27,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410166075] [2022-11-21 17:22:27,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:22:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:22:27,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:27,986 INFO L87 Difference]: Start difference. First operand 164 states and 301 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:28,085 INFO L93 Difference]: Finished difference Result 157 states and 292 transitions. [2022-11-21 17:22:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-21 17:22:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:28,088 INFO L225 Difference]: With dead ends: 157 [2022-11-21 17:22:28,088 INFO L226 Difference]: Without dead ends: 157 [2022-11-21 17:22:28,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:28,091 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:28,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:22:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-21 17:22:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-21 17:22:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 156 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 292 transitions. [2022-11-21 17:22:28,109 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 292 transitions. Word has length 2 [2022-11-21 17:22:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:28,109 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 292 transitions. [2022-11-21 17:22:28,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 292 transitions. [2022-11-21 17:22:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-21 17:22:28,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:28,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-21 17:22:28,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:22:28,111 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:28,112 INFO L85 PathProgramCache]: Analyzing trace with hash 495458558, now seen corresponding path program 1 times [2022-11-21 17:22:28,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:28,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134489414] [2022-11-21 17:22:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:28,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:28,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:28,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134489414] [2022-11-21 17:22:28,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134489414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:22:28,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975335694] [2022-11-21 17:22:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:28,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:22:28,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:22:28,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:22:28,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:22:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:28,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 17:22:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:22:28,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 17:22:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:28,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:22:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:28,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975335694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:22:28,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:22:28,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-21 17:22:28,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091895786] [2022-11-21 17:22:28,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:22:28,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 17:22:28,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:28,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 17:22:28,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-21 17:22:28,692 INFO L87 Difference]: Start difference. First operand 157 states and 292 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:28,790 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2022-11-21 17:22:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:22:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-21 17:22:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:28,793 INFO L225 Difference]: With dead ends: 43 [2022-11-21 17:22:28,794 INFO L226 Difference]: Without dead ends: 43 [2022-11-21 17:22:28,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:22:28,798 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:28,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 7 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:22:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-21 17:22:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-21 17:22:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 69 transitions. [2022-11-21 17:22:28,821 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 69 transitions. Word has length 5 [2022-11-21 17:22:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:28,821 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 69 transitions. [2022-11-21 17:22:28,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:28,823 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 69 transitions. [2022-11-21 17:22:28,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 17:22:28,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:28,824 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-21 17:22:28,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:22:29,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:22:29,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1820653557, now seen corresponding path program 1 times [2022-11-21 17:22:29,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:29,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830033529] [2022-11-21 17:22:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:29,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:22:29,068 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:22:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:22:29,123 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:22:29,123 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:22:29,124 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-21 17:22:29,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-21 17:22:29,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-21 17:22:29,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-21 17:22:29,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-21 17:22:29,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-21 17:22:29,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-21 17:22:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 17:22:29,133 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 17:22:29,136 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 17:22:29,137 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-21 17:22:29,171 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 17:22:29,182 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 17:22:29,182 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 164 transitions, 346 flow [2022-11-21 17:22:29,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 164 transitions, 346 flow [2022-11-21 17:22:29,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 164 transitions, 346 flow [2022-11-21 17:22:29,290 INFO L130 PetriNetUnfolder]: 40/298 cut-off events. [2022-11-21 17:22:29,290 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-21 17:22:29,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 298 events. 40/298 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 923 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 188. Up to 9 conditions per place. [2022-11-21 17:22:29,308 INFO L119 LiptonReduction]: Number of co-enabled transitions 8680 [2022-11-21 17:22:34,282 INFO L134 LiptonReduction]: Checked pairs total: 19980 [2022-11-21 17:22:34,282 INFO L136 LiptonReduction]: Total number of compositions: 148 [2022-11-21 17:22:34,283 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 62 transitions, 142 flow [2022-11-21 17:22:34,403 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3090 states, 3064 states have (on average 3.8051566579634466) internal successors, (11659), 3089 states have internal predecessors, (11659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:34,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:22:34,405 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4082e699, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:22:34,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 17:22:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 3090 states, 3064 states have (on average 3.8051566579634466) internal successors, (11659), 3089 states have internal predecessors, (11659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 17:22:34,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:34,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 17:22:34,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:34,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:34,419 INFO L85 PathProgramCache]: Analyzing trace with hash 27573, now seen corresponding path program 1 times [2022-11-21 17:22:34,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:34,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957229860] [2022-11-21 17:22:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:34,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:34,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:34,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957229860] [2022-11-21 17:22:34,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957229860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:34,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:34,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:22:34,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20664065] [2022-11-21 17:22:34,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:34,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:22:34,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:34,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:22:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:34,549 INFO L87 Difference]: Start difference. First operand has 3090 states, 3064 states have (on average 3.8051566579634466) internal successors, (11659), 3089 states have internal predecessors, (11659), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:34,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:34,689 INFO L93 Difference]: Finished difference Result 3083 states and 8432 transitions. [2022-11-21 17:22:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:34,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-21 17:22:34,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:34,713 INFO L225 Difference]: With dead ends: 3083 [2022-11-21 17:22:34,713 INFO L226 Difference]: Without dead ends: 2914 [2022-11-21 17:22:34,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:34,716 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:34,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:22:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2022-11-21 17:22:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2914. [2022-11-21 17:22:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2914 states, 2894 states have (on average 2.756392536281963) internal successors, (7977), 2913 states have internal predecessors, (7977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 7977 transitions. [2022-11-21 17:22:34,865 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 7977 transitions. Word has length 2 [2022-11-21 17:22:34,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:34,865 INFO L495 AbstractCegarLoop]: Abstraction has 2914 states and 7977 transitions. [2022-11-21 17:22:34,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 7977 transitions. [2022-11-21 17:22:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 17:22:34,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:34,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 17:22:34,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 17:22:34,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 27574, now seen corresponding path program 1 times [2022-11-21 17:22:34,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:34,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578354772] [2022-11-21 17:22:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:34,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:34,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578354772] [2022-11-21 17:22:34,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578354772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:34,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:34,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:22:34,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396566984] [2022-11-21 17:22:34,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:34,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:22:34,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:34,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:22:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:34,897 INFO L87 Difference]: Start difference. First operand 2914 states and 7977 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:34,991 INFO L93 Difference]: Finished difference Result 2588 states and 7090 transitions. [2022-11-21 17:22:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:34,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-21 17:22:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:35,008 INFO L225 Difference]: With dead ends: 2588 [2022-11-21 17:22:35,008 INFO L226 Difference]: Without dead ends: 2588 [2022-11-21 17:22:35,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:35,009 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:35,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 19 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:22:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2022-11-21 17:22:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2588. [2022-11-21 17:22:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2575 states have (on average 2.753398058252427) internal successors, (7090), 2587 states have internal predecessors, (7090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 7090 transitions. [2022-11-21 17:22:35,110 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 7090 transitions. Word has length 2 [2022-11-21 17:22:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:35,111 INFO L495 AbstractCegarLoop]: Abstraction has 2588 states and 7090 transitions. [2022-11-21 17:22:35,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 7090 transitions. [2022-11-21 17:22:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 17:22:35,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:35,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 17:22:35,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 17:22:35,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:35,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:35,114 INFO L85 PathProgramCache]: Analyzing trace with hash -285601274, now seen corresponding path program 1 times [2022-11-21 17:22:35,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:35,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858968189] [2022-11-21 17:22:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:35,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:35,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:35,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858968189] [2022-11-21 17:22:35,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858968189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:22:35,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122929156] [2022-11-21 17:22:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:35,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:22:35,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:22:35,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:22:35,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:22:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 17:22:35,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:22:35,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 17:22:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:35,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:22:35,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:35,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122929156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:22:35,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:22:35,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-21 17:22:35,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353044901] [2022-11-21 17:22:35,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:22:35,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 17:22:35,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:35,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 17:22:35,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-21 17:22:35,429 INFO L87 Difference]: Start difference. First operand 2588 states and 7090 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:35,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:35,610 INFO L93 Difference]: Finished difference Result 771 states and 1991 transitions. [2022-11-21 17:22:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:22:35,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-21 17:22:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:35,653 INFO L225 Difference]: With dead ends: 771 [2022-11-21 17:22:35,654 INFO L226 Difference]: Without dead ends: 771 [2022-11-21 17:22:35,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:22:35,655 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 146 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:35,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 47 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:22:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-21 17:22:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-21 17:22:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 2.585714285714286) internal successors, (1991), 770 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1991 transitions. [2022-11-21 17:22:35,700 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1991 transitions. Word has length 6 [2022-11-21 17:22:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:35,700 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1991 transitions. [2022-11-21 17:22:35,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1991 transitions. [2022-11-21 17:22:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 17:22:35,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:35,705 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-21 17:22:35,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:22:35,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:22:35,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1135406356, now seen corresponding path program 1 times [2022-11-21 17:22:35,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:35,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26499987] [2022-11-21 17:22:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:35,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:22:35,946 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:22:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:22:35,962 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:22:35,962 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:22:35,963 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-21 17:22:35,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-21 17:22:35,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-21 17:22:35,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-21 17:22:35,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-21 17:22:35,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-21 17:22:35,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-21 17:22:35,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 17:22:35,965 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 17:22:35,965 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 17:22:35,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-21 17:22:35,996 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 17:22:35,999 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 17:22:35,999 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 194 transitions, 418 flow [2022-11-21 17:22:36,004 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 194 transitions, 418 flow [2022-11-21 17:22:36,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 194 transitions, 418 flow [2022-11-21 17:22:36,102 INFO L130 PetriNetUnfolder]: 62/453 cut-off events. [2022-11-21 17:22:36,103 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-21 17:22:36,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 62/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1607 event pairs, 1 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2022-11-21 17:22:36,125 INFO L119 LiptonReduction]: Number of co-enabled transitions 15624 [2022-11-21 17:22:40,908 INFO L134 LiptonReduction]: Checked pairs total: 35357 [2022-11-21 17:22:40,908 INFO L136 LiptonReduction]: Total number of compositions: 169 [2022-11-21 17:22:40,909 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 81 transitions, 192 flow [2022-11-21 17:22:42,479 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38466 states, 38421 states have (on average 5.138439915671118) internal successors, (197424), 38465 states have internal predecessors, (197424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:42,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:22:42,482 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4082e699, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:22:42,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 17:22:42,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 38466 states, 38421 states have (on average 5.138439915671118) internal successors, (197424), 38465 states have internal predecessors, (197424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 17:22:42,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:42,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 17:22:42,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash 40137, now seen corresponding path program 1 times [2022-11-21 17:22:42,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:42,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670774767] [2022-11-21 17:22:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:42,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:42,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:42,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670774767] [2022-11-21 17:22:42,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670774767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:42,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:42,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:22:42,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740286829] [2022-11-21 17:22:42,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:42,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:22:42,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:42,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:22:42,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:42,867 INFO L87 Difference]: Start difference. First operand has 38466 states, 38421 states have (on average 5.138439915671118) internal successors, (197424), 38465 states have internal predecessors, (197424), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:44,261 INFO L93 Difference]: Finished difference Result 38459 states and 138997 transitions. [2022-11-21 17:22:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:44,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-21 17:22:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:44,912 INFO L225 Difference]: With dead ends: 38459 [2022-11-21 17:22:44,913 INFO L226 Difference]: Without dead ends: 36262 [2022-11-21 17:22:44,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:44,915 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:44,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 32 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:22:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36262 states. [2022-11-21 17:22:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36262 to 36262. [2022-11-21 17:22:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36262 states, 36227 states have (on average 3.6222430783669637) internal successors, (131223), 36261 states have internal predecessors, (131223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36262 states to 36262 states and 131223 transitions. [2022-11-21 17:22:47,244 INFO L78 Accepts]: Start accepts. Automaton has 36262 states and 131223 transitions. Word has length 2 [2022-11-21 17:22:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:47,244 INFO L495 AbstractCegarLoop]: Abstraction has 36262 states and 131223 transitions. [2022-11-21 17:22:47,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:47,245 INFO L276 IsEmpty]: Start isEmpty. Operand 36262 states and 131223 transitions. [2022-11-21 17:22:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 17:22:47,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:47,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 17:22:47,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 17:22:47,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:47,247 INFO L85 PathProgramCache]: Analyzing trace with hash 40138, now seen corresponding path program 1 times [2022-11-21 17:22:47,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:47,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540817874] [2022-11-21 17:22:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:47,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:47,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:47,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540817874] [2022-11-21 17:22:47,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540817874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:47,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:47,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:22:47,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054190606] [2022-11-21 17:22:47,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:47,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:22:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:22:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:47,280 INFO L87 Difference]: Start difference. First operand 36262 states and 131223 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:47,777 INFO L93 Difference]: Finished difference Result 32180 states and 116537 transitions. [2022-11-21 17:22:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:47,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-21 17:22:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:48,193 INFO L225 Difference]: With dead ends: 32180 [2022-11-21 17:22:48,197 INFO L226 Difference]: Without dead ends: 32180 [2022-11-21 17:22:48,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:48,198 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:48,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 29 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:22:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32180 states. [2022-11-21 17:22:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32180 to 32180. [2022-11-21 17:22:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32180 states, 32157 states have (on average 3.624000995117704) internal successors, (116537), 32179 states have internal predecessors, (116537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32180 states to 32180 states and 116537 transitions. [2022-11-21 17:22:49,774 INFO L78 Accepts]: Start accepts. Automaton has 32180 states and 116537 transitions. Word has length 2 [2022-11-21 17:22:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:49,775 INFO L495 AbstractCegarLoop]: Abstraction has 32180 states and 116537 transitions. [2022-11-21 17:22:49,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32180 states and 116537 transitions. [2022-11-21 17:22:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 17:22:49,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:49,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 17:22:49,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 17:22:49,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1553251045, now seen corresponding path program 1 times [2022-11-21 17:22:49,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:49,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991477476] [2022-11-21 17:22:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:49,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:49,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:49,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991477476] [2022-11-21 17:22:49,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991477476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:22:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664281016] [2022-11-21 17:22:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:49,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:22:49,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:22:49,915 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:22:49,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:22:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:50,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 17:22:50,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:22:50,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 17:22:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:50,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:22:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:50,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664281016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:22:50,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:22:50,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-21 17:22:50,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750855279] [2022-11-21 17:22:50,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:22:50,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 17:22:50,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:50,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 17:22:50,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:22:50,117 INFO L87 Difference]: Start difference. First operand 32180 states and 116537 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2022-11-21 17:22:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:50,783 INFO L93 Difference]: Finished difference Result 30780 states and 110948 transitions. [2022-11-21 17:22:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:22:50,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) Word has length 6 [2022-11-21 17:22:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:50,990 INFO L225 Difference]: With dead ends: 30780 [2022-11-21 17:22:50,990 INFO L226 Difference]: Without dead ends: 30780 [2022-11-21 17:22:50,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-21 17:22:50,991 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 209 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:50,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 104 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:22:51,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30780 states. [2022-11-21 17:22:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30780 to 30224. [2022-11-21 17:22:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30224 states, 30205 states have (on average 3.624035755669591) internal successors, (109464), 30223 states have internal predecessors, (109464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30224 states to 30224 states and 109464 transitions. [2022-11-21 17:22:52,277 INFO L78 Accepts]: Start accepts. Automaton has 30224 states and 109464 transitions. Word has length 6 [2022-11-21 17:22:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:52,277 INFO L495 AbstractCegarLoop]: Abstraction has 30224 states and 109464 transitions. [2022-11-21 17:22:52,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2022-11-21 17:22:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 30224 states and 109464 transitions. [2022-11-21 17:22:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 17:22:52,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:52,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-21 17:22:52,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 17:22:52,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:22:52,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:52,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1810904319, now seen corresponding path program 1 times [2022-11-21 17:22:52,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:52,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795514210] [2022-11-21 17:22:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:52,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:22:52,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:52,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795514210] [2022-11-21 17:22:52,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795514210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:52,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:52,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:22:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298943595] [2022-11-21 17:22:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:52,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:22:52,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:22:52,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:52,575 INFO L87 Difference]: Start difference. First operand 30224 states and 109464 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:52,932 INFO L93 Difference]: Finished difference Result 42743 states and 151633 transitions. [2022-11-21 17:22:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:52,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-21 17:22:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:53,162 INFO L225 Difference]: With dead ends: 42743 [2022-11-21 17:22:53,162 INFO L226 Difference]: Without dead ends: 42743 [2022-11-21 17:22:53,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:53,163 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:53,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 30 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:22:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42743 states. [2022-11-21 17:22:54,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42743 to 30074. [2022-11-21 17:22:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30074 states, 30055 states have (on average 3.6229911828314756) internal successors, (108889), 30073 states have internal predecessors, (108889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30074 states to 30074 states and 108889 transitions. [2022-11-21 17:22:54,871 INFO L78 Accepts]: Start accepts. Automaton has 30074 states and 108889 transitions. Word has length 12 [2022-11-21 17:22:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:54,872 INFO L495 AbstractCegarLoop]: Abstraction has 30074 states and 108889 transitions. [2022-11-21 17:22:54,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 30074 states and 108889 transitions. [2022-11-21 17:22:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 17:22:54,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:54,873 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-21 17:22:54,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 17:22:54,874 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:54,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1810899024, now seen corresponding path program 1 times [2022-11-21 17:22:54,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:54,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467087324] [2022-11-21 17:22:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:54,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:22:55,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:22:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467087324] [2022-11-21 17:22:55,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467087324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:22:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390459922] [2022-11-21 17:22:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:55,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:22:55,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:22:55,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:22:55,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 17:22:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:55,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 17:22:55,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:22:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:55,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:22:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:55,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390459922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:22:55,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:22:55,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-21 17:22:55,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999821522] [2022-11-21 17:22:55,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:22:55,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:22:55,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:22:55,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:22:55,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:22:55,212 INFO L87 Difference]: Start difference. First operand 30074 states and 108889 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:55,461 INFO L93 Difference]: Finished difference Result 9267 states and 32399 transitions. [2022-11-21 17:22:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:22:55,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-21 17:22:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:55,494 INFO L225 Difference]: With dead ends: 9267 [2022-11-21 17:22:55,495 INFO L226 Difference]: Without dead ends: 9267 [2022-11-21 17:22:55,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:22:55,496 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 330 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:55,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 83 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:22:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9267 states. [2022-11-21 17:22:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9267 to 9267. [2022-11-21 17:22:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9267 states, 9266 states have (on average 3.496546514137708) internal successors, (32399), 9266 states have internal predecessors, (32399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 32399 transitions. [2022-11-21 17:22:55,757 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 32399 transitions. Word has length 12 [2022-11-21 17:22:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:55,757 INFO L495 AbstractCegarLoop]: Abstraction has 9267 states and 32399 transitions. [2022-11-21 17:22:55,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:22:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 32399 transitions. [2022-11-21 17:22:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 17:22:55,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:55,765 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-21 17:22:55,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 17:22:55,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f694f2a-5631-4e72-922b-88d0b98d200b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:22:55,970 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:22:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:55,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1931325571, now seen corresponding path program 1 times [2022-11-21 17:22:55,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:22:55,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472429417] [2022-11-21 17:22:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:55,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:22:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:22:55,991 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:22:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:22:56,008 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:22:56,009 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:22:56,009 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-21 17:22:56,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-21 17:22:56,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-21 17:22:56,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-21 17:22:56,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-21 17:22:56,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-21 17:22:56,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-21 17:22:56,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 17:22:56,011 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-21 17:22:56,011 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 17:22:56,011 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-21 17:22:56,031 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-21 17:22:56,034 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 17:22:56,034 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 224 transitions, 492 flow [2022-11-21 17:22:56,035 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 224 transitions, 492 flow [2022-11-21 17:22:56,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 224 transitions, 492 flow [2022-11-21 17:22:56,478 INFO L130 PetriNetUnfolder]: 96/696 cut-off events. [2022-11-21 17:22:56,478 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-21 17:22:56,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 696 events. 96/696 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2871 event pairs, 6 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-11-21 17:22:56,513 INFO L119 LiptonReduction]: Number of co-enabled transitions 24304 [2022-11-21 17:23:02,075 INFO L134 LiptonReduction]: Checked pairs total: 63811 [2022-11-21 17:23:02,075 INFO L136 LiptonReduction]: Total number of compositions: 190 [2022-11-21 17:23:02,077 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 78 places, 100 transitions, 244 flow [2022-11-21 17:23:23,651 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 479202 states, 479122 states have (on average 6.491284057087756) internal successors, (3110117), 479201 states have internal predecessors, (3110117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:23,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:23:23,659 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4082e699, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:23:23,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 17:23:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 479202 states, 479122 states have (on average 6.491284057087756) internal successors, (3110117), 479201 states have internal predecessors, (3110117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 17:23:24,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:24,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 17:23:24,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 17:23:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:24,455 INFO L85 PathProgramCache]: Analyzing trace with hash 54336, now seen corresponding path program 1 times [2022-11-21 17:23:24,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:24,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608569552] [2022-11-21 17:23:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:24,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:24,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:23:24,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608569552] [2022-11-21 17:23:24,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608569552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:24,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:24,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:23:24,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546546015] [2022-11-21 17:23:24,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:24,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:23:24,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:23:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:23:24,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:27,033 INFO L87 Difference]: Start difference. First operand has 479202 states, 479122 states have (on average 6.491284057087756) internal successors, (3110117), 479201 states have internal predecessors, (3110117), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)