./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 14:16:17,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:16:17,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:16:17,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:16:17,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:16:17,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:16:17,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:16:17,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:16:17,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:16:17,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:16:17,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:16:17,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:16:17,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:16:17,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:16:17,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:16:17,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:16:17,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:16:17,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:16:17,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:16:17,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:16:17,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:16:17,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:16:17,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:16:17,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:16:17,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:16:17,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:16:17,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:16:17,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:16:17,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:16:17,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:16:17,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:16:17,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:16:17,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:16:17,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:16:17,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:16:17,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:16:17,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:16:17,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:16:17,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:16:17,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:16:17,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:16:17,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:16:17,303 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:16:17,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:16:17,304 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:16:17,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:16:17,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:16:17,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:16:17,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:16:17,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:16:17,310 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:16:17,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:16:17,311 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:16:17,311 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:16:17,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:16:17,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:16:17,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:16:17,311 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:16:17,312 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:16:17,312 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:16:17,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:16:17,312 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:16:17,312 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:16:17,312 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:16:17,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:16:17,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:16:17,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:16:17,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:16:17,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:16:17,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:16:17,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:16:17,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:16:17,314 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:16:17,314 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:16:17,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:16:17,314 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:16:17,315 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2022-12-13 14:16:17,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:16:17,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:16:17,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:16:17,518 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:16:17,519 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:16:17,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/stack-2.i [2022-12-13 14:16:20,137 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:16:20,298 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:16:20,299 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/sv-benchmarks/c/pthread/stack-2.i [2022-12-13 14:16:20,311 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/data/db43d7d9c/20240aa969c14408b196295b24ffce9e/FLAG73d032f85 [2022-12-13 14:16:20,322 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/data/db43d7d9c/20240aa969c14408b196295b24ffce9e [2022-12-13 14:16:20,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:16:20,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:16:20,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:16:20,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:16:20,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:16:20,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47cd3ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20, skipping insertion in model container [2022-12-13 14:16:20,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:16:20,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:16:20,649 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_db61750f-aa2b-4729-b91b-ece5c4e89b65/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-12-13 14:16:20,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:16:20,686 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:16:20,728 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_db61750f-aa2b-4729-b91b-ece5c4e89b65/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-12-13 14:16:20,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:16:20,792 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:16:20,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20 WrapperNode [2022-12-13 14:16:20,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:16:20,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:16:20,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:16:20,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:16:20,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,828 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 159 [2022-12-13 14:16:20,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:16:20,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:16:20,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:16:20,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:16:20,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,856 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:16:20,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:16:20,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:16:20,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:16:20,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (1/1) ... [2022-12-13 14:16:20,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:16:20,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:16:20,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:16:20,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:16:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 14:16:20,917 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 14:16:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 14:16:20,918 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 14:16:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:16:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:16:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:16:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:16:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 14:16:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:16:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:16:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:16:20,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:16:20,920 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 14:16:21,025 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:16:21,027 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:16:21,268 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:16:21,274 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:16:21,275 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 14:16:21,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:16:21 BoogieIcfgContainer [2022-12-13 14:16:21,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:16:21,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:16:21,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:16:21,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:16:21,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:16:20" (1/3) ... [2022-12-13 14:16:21,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab124f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:16:21, skipping insertion in model container [2022-12-13 14:16:21,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:20" (2/3) ... [2022-12-13 14:16:21,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab124f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:16:21, skipping insertion in model container [2022-12-13 14:16:21,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:16:21" (3/3) ... [2022-12-13 14:16:21,282 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2022-12-13 14:16:21,295 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:16:21,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-13 14:16:21,296 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:16:21,362 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:16:21,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 199 transitions, 414 flow [2022-12-13 14:16:21,437 INFO L130 PetriNetUnfolder]: 10/197 cut-off events. [2022-12-13 14:16:21,437 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:16:21,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 197 events. 10/197 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 504 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-12-13 14:16:21,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 199 transitions, 414 flow [2022-12-13 14:16:21,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 192 transitions, 396 flow [2022-12-13 14:16:21,449 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:16:21,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 192 transitions, 396 flow [2022-12-13 14:16:21,458 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 192 transitions, 396 flow [2022-12-13 14:16:21,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 192 transitions, 396 flow [2022-12-13 14:16:21,486 INFO L130 PetriNetUnfolder]: 10/192 cut-off events. [2022-12-13 14:16:21,486 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:16:21,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 10/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 478 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-12-13 14:16:21,490 INFO L119 LiptonReduction]: Number of co-enabled transitions 11140 [2022-12-13 14:16:25,210 INFO L134 LiptonReduction]: Checked pairs total: 15283 [2022-12-13 14:16:25,210 INFO L136 LiptonReduction]: Total number of compositions: 200 [2022-12-13 14:16:25,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:16:25,226 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6063e705, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:16:25,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-12-13 14:16:25,227 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 14:16:25,227 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:16:25,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:25,228 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 14:16:25,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:25,232 INFO L85 PathProgramCache]: Analyzing trace with hash 809, now seen corresponding path program 1 times [2022-12-13 14:16:25,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:25,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191797880] [2022-12-13 14:16:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:25,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:25,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:25,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191797880] [2022-12-13 14:16:25,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191797880] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:25,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:25,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 14:16:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327177666] [2022-12-13 14:16:25,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:25,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 14:16:25,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 14:16:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:16:25,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 399 [2022-12-13 14:16:25,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:25,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:25,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 399 [2022-12-13 14:16:25,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:25,582 INFO L130 PetriNetUnfolder]: 1555/2394 cut-off events. [2022-12-13 14:16:25,582 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2022-12-13 14:16:25,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4835 conditions, 2394 events. 1555/2394 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11045 event pairs, 1267 based on Foata normal form. 0/1340 useless extension candidates. Maximal degree in co-relation 4566. Up to 2395 conditions per place. [2022-12-13 14:16:25,596 INFO L137 encePairwiseOnDemand]: 397/399 looper letters, 45 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2022-12-13 14:16:25,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 192 flow [2022-12-13 14:16:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 14:16:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 14:16:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 423 transitions. [2022-12-13 14:16:25,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5300751879699248 [2022-12-13 14:16:25,610 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 423 transitions. [2022-12-13 14:16:25,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 423 transitions. [2022-12-13 14:16:25,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:25,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 423 transitions. [2022-12-13 14:16:25,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 211.5) internal successors, (423), 2 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:25,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:25,621 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:25,623 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 423 transitions. [2022-12-13 14:16:25,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 192 flow [2022-12-13 14:16:25,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:16:25,627 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2022-12-13 14:16:25,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2022-12-13 14:16:25,632 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2022-12-13 14:16:25,632 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2022-12-13 14:16:25,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:25,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:25,632 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:16:25,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:16:25,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash 794128, now seen corresponding path program 1 times [2022-12-13 14:16:25,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:25,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596294775] [2022-12-13 14:16:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:25,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:25,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596294775] [2022-12-13 14:16:25,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596294775] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:25,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:25,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:16:25,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612501746] [2022-12-13 14:16:25,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:25,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:16:25,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:16:25,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:16:25,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 399 [2022-12-13 14:16:25,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:25,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:25,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 399 [2022-12-13 14:16:25,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:26,064 INFO L130 PetriNetUnfolder]: 1525/2337 cut-off events. [2022-12-13 14:16:26,064 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 14:16:26,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 2337 events. 1525/2337 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10708 event pairs, 1242 based on Foata normal form. 0/1321 useless extension candidates. Maximal degree in co-relation 4688. Up to 2336 conditions per place. [2022-12-13 14:16:26,083 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 41 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-12-13 14:16:26,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 176 flow [2022-12-13 14:16:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:16:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:16:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2022-12-13 14:16:26,088 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49624060150375937 [2022-12-13 14:16:26,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2022-12-13 14:16:26,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2022-12-13 14:16:26,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:26,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2022-12-13 14:16:26,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,100 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 594 transitions. [2022-12-13 14:16:26,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 176 flow [2022-12-13 14:16:26,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:16:26,102 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2022-12-13 14:16:26,102 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2022-12-13 14:16:26,103 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2022-12-13 14:16:26,103 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2022-12-13 14:16:26,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,104 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:26,104 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:16:26,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:16:26,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:26,105 INFO L85 PathProgramCache]: Analyzing trace with hash 794127, now seen corresponding path program 1 times [2022-12-13 14:16:26,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:26,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897241634] [2022-12-13 14:16:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:26,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:26,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:26,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897241634] [2022-12-13 14:16:26,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897241634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:26,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:26,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:16:26,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794902106] [2022-12-13 14:16:26,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:26,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:16:26,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:26,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:16:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:16:26,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 399 [2022-12-13 14:16:26,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:26,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 399 [2022-12-13 14:16:26,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:26,398 INFO L130 PetriNetUnfolder]: 1495/2280 cut-off events. [2022-12-13 14:16:26,399 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 14:16:26,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4580 conditions, 2280 events. 1495/2280 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10303 event pairs, 1217 based on Foata normal form. 0/1302 useless extension candidates. Maximal degree in co-relation 4576. Up to 2279 conditions per place. [2022-12-13 14:16:26,414 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 39 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-12-13 14:16:26,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 172 flow [2022-12-13 14:16:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:16:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:16:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2022-12-13 14:16:26,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48454469507101083 [2022-12-13 14:16:26,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2022-12-13 14:16:26,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2022-12-13 14:16:26,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:26,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2022-12-13 14:16:26,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,419 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 580 transitions. [2022-12-13 14:16:26,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 172 flow [2022-12-13 14:16:26,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:16:26,420 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2022-12-13 14:16:26,420 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2022-12-13 14:16:26,421 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2022-12-13 14:16:26,421 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2022-12-13 14:16:26,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:26,421 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:16:26,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:16:26,422 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:26,422 INFO L85 PathProgramCache]: Analyzing trace with hash 763173697, now seen corresponding path program 1 times [2022-12-13 14:16:26,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:26,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334207740] [2022-12-13 14:16:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:26,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:26,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:26,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334207740] [2022-12-13 14:16:26,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334207740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:26,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:26,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:16:26,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610588985] [2022-12-13 14:16:26,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:26,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:16:26,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:16:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:16:26,577 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 399 [2022-12-13 14:16:26,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:26,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 399 [2022-12-13 14:16:26,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:26,722 INFO L130 PetriNetUnfolder]: 1091/1694 cut-off events. [2022-12-13 14:16:26,722 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 14:16:26,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 1694 events. 1091/1694 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7377 event pairs, 880 based on Foata normal form. 0/1046 useless extension candidates. Maximal degree in co-relation 3404. Up to 1693 conditions per place. [2022-12-13 14:16:26,728 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-12-13 14:16:26,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 168 flow [2022-12-13 14:16:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:16:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:16:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2022-12-13 14:16:26,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4878863826232247 [2022-12-13 14:16:26,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2022-12-13 14:16:26,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2022-12-13 14:16:26,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:26,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2022-12-13 14:16:26,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,741 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 584 transitions. [2022-12-13 14:16:26,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 168 flow [2022-12-13 14:16:26,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:16:26,743 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2022-12-13 14:16:26,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2022-12-13 14:16:26,744 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2022-12-13 14:16:26,744 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2022-12-13 14:16:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:26,745 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:16:26,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 14:16:26,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash 763173696, now seen corresponding path program 1 times [2022-12-13 14:16:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:26,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188970787] [2022-12-13 14:16:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:26,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:26,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188970787] [2022-12-13 14:16:26,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188970787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:26,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:26,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:16:26,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121327964] [2022-12-13 14:16:26,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:26,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:16:26,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:26,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:16:26,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:16:26,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 399 [2022-12-13 14:16:26,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:26,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 399 [2022-12-13 14:16:26,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:26,953 INFO L130 PetriNetUnfolder]: 687/1108 cut-off events. [2022-12-13 14:16:26,953 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 14:16:26,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 1108 events. 687/1108 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4628 event pairs, 543 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 2232. Up to 1107 conditions per place. [2022-12-13 14:16:26,956 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 37 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-12-13 14:16:26,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 164 flow [2022-12-13 14:16:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:16:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:16:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-12-13 14:16:26,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47201336675020883 [2022-12-13 14:16:26,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-12-13 14:16:26,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-12-13 14:16:26,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:26,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-12-13 14:16:26,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,964 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 565 transitions. [2022-12-13 14:16:26,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 164 flow [2022-12-13 14:16:26,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:16:26,966 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2022-12-13 14:16:26,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-12-13 14:16:26,966 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2022-12-13 14:16:26,966 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2022-12-13 14:16:26,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:26,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:26,967 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:16:26,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:16:26,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:26,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2112384202, now seen corresponding path program 1 times [2022-12-13 14:16:26,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:26,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708479948] [2022-12-13 14:16:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:26,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:27,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:27,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708479948] [2022-12-13 14:16:27,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708479948] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:27,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:27,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:16:27,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115626128] [2022-12-13 14:16:27,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:27,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:16:27,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:27,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:16:27,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:16:27,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 399 [2022-12-13 14:16:27,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:27,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:27,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 399 [2022-12-13 14:16:27,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:27,233 INFO L130 PetriNetUnfolder]: 1159/1872 cut-off events. [2022-12-13 14:16:27,233 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 14:16:27,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3774 conditions, 1872 events. 1159/1872 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8393 event pairs, 342 based on Foata normal form. 0/1358 useless extension candidates. Maximal degree in co-relation 3770. Up to 1120 conditions per place. [2022-12-13 14:16:27,242 INFO L137 encePairwiseOnDemand]: 394/399 looper letters, 67 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2022-12-13 14:16:27,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 71 transitions, 297 flow [2022-12-13 14:16:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:16:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:16:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2022-12-13 14:16:27,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5213032581453634 [2022-12-13 14:16:27,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2022-12-13 14:16:27,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2022-12-13 14:16:27,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:27,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2022-12-13 14:16:27,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:27,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:27,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:27,249 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 624 transitions. [2022-12-13 14:16:27,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 71 transitions, 297 flow [2022-12-13 14:16:27,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 71 transitions, 291 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:16:27,251 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2022-12-13 14:16:27,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2022-12-13 14:16:27,252 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2022-12-13 14:16:27,252 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2022-12-13 14:16:27,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:27,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:27,253 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:16:27,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:16:27,253 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:27,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:27,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2112385587, now seen corresponding path program 1 times [2022-12-13 14:16:27,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:27,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783571831] [2022-12-13 14:16:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:27,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:27,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783571831] [2022-12-13 14:16:27,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783571831] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:27,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:27,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:16:27,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426258869] [2022-12-13 14:16:27,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:27,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:16:27,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:27,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:16:27,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:16:27,495 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 399 [2022-12-13 14:16:27,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:27,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:27,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 399 [2022-12-13 14:16:27,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:27,712 INFO L130 PetriNetUnfolder]: 1377/2216 cut-off events. [2022-12-13 14:16:27,712 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2022-12-13 14:16:27,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4794 conditions, 2216 events. 1377/2216 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10712 event pairs, 312 based on Foata normal form. 0/1748 useless extension candidates. Maximal degree in co-relation 4789. Up to 1648 conditions per place. [2022-12-13 14:16:27,727 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 85 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2022-12-13 14:16:27,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 91 transitions, 422 flow [2022-12-13 14:16:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:16:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:16:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 985 transitions. [2022-12-13 14:16:27,732 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49373433583959897 [2022-12-13 14:16:27,732 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 985 transitions. [2022-12-13 14:16:27,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 985 transitions. [2022-12-13 14:16:27,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:27,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 985 transitions. [2022-12-13 14:16:27,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:27,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:27,742 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:27,742 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 985 transitions. [2022-12-13 14:16:27,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 91 transitions, 422 flow [2022-12-13 14:16:27,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 91 transitions, 406 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:16:27,746 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 136 flow [2022-12-13 14:16:27,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2022-12-13 14:16:27,747 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2022-12-13 14:16:27,747 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 136 flow [2022-12-13 14:16:27,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:27,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:27,748 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:16:27,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 14:16:27,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2112385586, now seen corresponding path program 1 times [2022-12-13 14:16:27,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:27,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101461839] [2022-12-13 14:16:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:27,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:27,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:27,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101461839] [2022-12-13 14:16:27,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101461839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:27,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:27,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:16:28,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011351228] [2022-12-13 14:16:28,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:28,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:16:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:16:28,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:16:28,154 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 399 [2022-12-13 14:16:28,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:28,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 399 [2022-12-13 14:16:28,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:28,481 INFO L130 PetriNetUnfolder]: 1642/2641 cut-off events. [2022-12-13 14:16:28,481 INFO L131 PetriNetUnfolder]: For 516/516 co-relation queries the response was YES. [2022-12-13 14:16:28,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6059 conditions, 2641 events. 1642/2641 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 12494 event pairs, 305 based on Foata normal form. 0/2219 useless extension candidates. Maximal degree in co-relation 6052. Up to 2170 conditions per place. [2022-12-13 14:16:28,491 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 95 selfloop transitions, 7 changer transitions 0/102 dead transitions. [2022-12-13 14:16:28,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 102 transitions, 483 flow [2022-12-13 14:16:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:16:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:16:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1001 transitions. [2022-12-13 14:16:28,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5017543859649123 [2022-12-13 14:16:28,493 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1001 transitions. [2022-12-13 14:16:28,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1001 transitions. [2022-12-13 14:16:28,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:28,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1001 transitions. [2022-12-13 14:16:28,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,499 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,499 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 136 flow. Second operand 5 states and 1001 transitions. [2022-12-13 14:16:28,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 102 transitions, 483 flow [2022-12-13 14:16:28,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 102 transitions, 479 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:16:28,502 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 193 flow [2022-12-13 14:16:28,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2022-12-13 14:16:28,503 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2022-12-13 14:16:28,503 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 193 flow [2022-12-13 14:16:28,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:28,504 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:28,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 14:16:28,504 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:28,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1477499340, now seen corresponding path program 1 times [2022-12-13 14:16:28,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:28,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139766525] [2022-12-13 14:16:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:28,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:28,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:28,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139766525] [2022-12-13 14:16:28,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139766525] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:28,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:28,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:16:28,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847826731] [2022-12-13 14:16:28,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:28,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:16:28,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:16:28,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:16:28,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 399 [2022-12-13 14:16:28,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:28,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 399 [2022-12-13 14:16:28,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:28,733 INFO L130 PetriNetUnfolder]: 1134/1845 cut-off events. [2022-12-13 14:16:28,733 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-12-13 14:16:28,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4248 conditions, 1845 events. 1134/1845 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7984 event pairs, 521 based on Foata normal form. 0/1571 useless extension candidates. Maximal degree in co-relation 4238. Up to 1544 conditions per place. [2022-12-13 14:16:28,739 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 60 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2022-12-13 14:16:28,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 311 flow [2022-12-13 14:16:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:16:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:16:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2022-12-13 14:16:28,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5137844611528822 [2022-12-13 14:16:28,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2022-12-13 14:16:28,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2022-12-13 14:16:28,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:28,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2022-12-13 14:16:28,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,745 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 193 flow. Second operand 3 states and 615 transitions. [2022-12-13 14:16:28,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 311 flow [2022-12-13 14:16:28,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 299 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 14:16:28,747 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 150 flow [2022-12-13 14:16:28,747 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-12-13 14:16:28,747 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2022-12-13 14:16:28,748 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 150 flow [2022-12-13 14:16:28,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:28,748 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:28,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 14:16:28,748 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:28,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1818993329, now seen corresponding path program 1 times [2022-12-13 14:16:28,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:28,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828546110] [2022-12-13 14:16:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:28,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:28,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:28,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828546110] [2022-12-13 14:16:28,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828546110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:28,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:28,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:16:28,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41890585] [2022-12-13 14:16:28,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:28,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:16:28,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:28,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:16:28,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:16:28,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 399 [2022-12-13 14:16:28,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:28,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 399 [2022-12-13 14:16:28,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:28,976 INFO L130 PetriNetUnfolder]: 1196/1943 cut-off events. [2022-12-13 14:16:28,976 INFO L131 PetriNetUnfolder]: For 400/400 co-relation queries the response was YES. [2022-12-13 14:16:28,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4551 conditions, 1943 events. 1196/1943 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8571 event pairs, 866 based on Foata normal form. 60/1827 useless extension candidates. Maximal degree in co-relation 4542. Up to 1788 conditions per place. [2022-12-13 14:16:28,982 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 63 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2022-12-13 14:16:28,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 343 flow [2022-12-13 14:16:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:16:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:16:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2022-12-13 14:16:28,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5104427736006684 [2022-12-13 14:16:28,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2022-12-13 14:16:28,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2022-12-13 14:16:28,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:28,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2022-12-13 14:16:28,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,986 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 150 flow. Second operand 3 states and 611 transitions. [2022-12-13 14:16:28,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 343 flow [2022-12-13 14:16:28,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:16:28,988 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 171 flow [2022-12-13 14:16:28,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2022-12-13 14:16:28,989 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2022-12-13 14:16:28,989 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 171 flow [2022-12-13 14:16:28,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:28,989 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:28,989 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:28,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 14:16:28,989 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:28,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1638392488, now seen corresponding path program 1 times [2022-12-13 14:16:28,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:28,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194351694] [2022-12-13 14:16:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:28,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:29,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:29,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194351694] [2022-12-13 14:16:29,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194351694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:29,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:29,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:16:29,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851556518] [2022-12-13 14:16:29,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:29,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:16:29,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:16:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:16:29,021 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 399 [2022-12-13 14:16:29,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:29,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:29,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 399 [2022-12-13 14:16:29,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:29,202 INFO L130 PetriNetUnfolder]: 1248/2019 cut-off events. [2022-12-13 14:16:29,202 INFO L131 PetriNetUnfolder]: For 599/599 co-relation queries the response was YES. [2022-12-13 14:16:29,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4979 conditions, 2019 events. 1248/2019 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9583 event pairs, 540 based on Foata normal form. 12/1847 useless extension candidates. Maximal degree in co-relation 4969. Up to 1726 conditions per place. [2022-12-13 14:16:29,208 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 69 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2022-12-13 14:16:29,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 370 flow [2022-12-13 14:16:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:16:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:16:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2022-12-13 14:16:29,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5162907268170426 [2022-12-13 14:16:29,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2022-12-13 14:16:29,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2022-12-13 14:16:29,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:29,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2022-12-13 14:16:29,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:29,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:29,214 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:29,214 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 171 flow. Second operand 3 states and 618 transitions. [2022-12-13 14:16:29,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 370 flow [2022-12-13 14:16:29,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:16:29,217 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 172 flow [2022-12-13 14:16:29,217 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2022-12-13 14:16:29,217 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-12-13 14:16:29,218 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 172 flow [2022-12-13 14:16:29,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:29,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:29,218 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:29,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 14:16:29,218 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:29,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash 928210409, now seen corresponding path program 1 times [2022-12-13 14:16:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:29,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035782002] [2022-12-13 14:16:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:29,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:29,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:29,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035782002] [2022-12-13 14:16:29,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035782002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:16:29,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929754831] [2022-12-13 14:16:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:29,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:16:29,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:16:29,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:16:29,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:16:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:29,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 14:16:29,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:16:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:16:29,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:16:29,648 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:16:29,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-12-13 14:16:29,674 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 14:16:29,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 14:16:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:29,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:16:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:30,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929754831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:16:30,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:16:30,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2022-12-13 14:16:30,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415435790] [2022-12-13 14:16:30,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:16:30,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:16:30,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:16:30,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:16:31,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 399 [2022-12-13 14:16:31,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 172 flow. Second operand has 21 states, 21 states have (on average 176.0) internal successors, (3696), 21 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:31,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:31,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 399 [2022-12-13 14:16:31,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:33,203 INFO L130 PetriNetUnfolder]: 2942/4749 cut-off events. [2022-12-13 14:16:33,203 INFO L131 PetriNetUnfolder]: For 1755/1755 co-relation queries the response was YES. [2022-12-13 14:16:33,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11976 conditions, 4749 events. 2942/4749 cut-off events. For 1755/1755 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 24297 event pairs, 499 based on Foata normal form. 102/4427 useless extension candidates. Maximal degree in co-relation 11965. Up to 1913 conditions per place. [2022-12-13 14:16:33,217 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 220 selfloop transitions, 26 changer transitions 0/246 dead transitions. [2022-12-13 14:16:33,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 246 transitions, 1204 flow [2022-12-13 14:16:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 14:16:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 14:16:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2673 transitions. [2022-12-13 14:16:33,221 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47851772287862515 [2022-12-13 14:16:33,221 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2673 transitions. [2022-12-13 14:16:33,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2673 transitions. [2022-12-13 14:16:33,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:33,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2673 transitions. [2022-12-13 14:16:33,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 190.92857142857142) internal successors, (2673), 14 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:33,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:33,230 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:33,230 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 172 flow. Second operand 14 states and 2673 transitions. [2022-12-13 14:16:33,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 246 transitions, 1204 flow [2022-12-13 14:16:33,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 246 transitions, 1201 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:16:33,235 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 401 flow [2022-12-13 14:16:33,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=401, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2022-12-13 14:16:33,235 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 23 predicate places. [2022-12-13 14:16:33,235 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 401 flow [2022-12-13 14:16:33,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 176.0) internal successors, (3696), 21 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:33,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:33,237 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:33,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:16:33,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 14:16:33,438 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:33,439 INFO L85 PathProgramCache]: Analyzing trace with hash 405780547, now seen corresponding path program 1 times [2022-12-13 14:16:33,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:33,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307748764] [2022-12-13 14:16:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:33,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:33,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:33,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307748764] [2022-12-13 14:16:33,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307748764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:33,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:33,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:16:33,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503242394] [2022-12-13 14:16:33,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:33,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:16:33,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:33,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:16:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:16:33,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 399 [2022-12-13 14:16:33,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 401 flow. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:33,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:33,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 399 [2022-12-13 14:16:33,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:33,708 INFO L130 PetriNetUnfolder]: 750/1377 cut-off events. [2022-12-13 14:16:33,708 INFO L131 PetriNetUnfolder]: For 1341/1341 co-relation queries the response was YES. [2022-12-13 14:16:33,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3807 conditions, 1377 events. 750/1377 cut-off events. For 1341/1341 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6214 event pairs, 97 based on Foata normal form. 74/1387 useless extension candidates. Maximal degree in co-relation 3788. Up to 1119 conditions per place. [2022-12-13 14:16:33,713 INFO L137 encePairwiseOnDemand]: 394/399 looper letters, 58 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2022-12-13 14:16:33,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 450 flow [2022-12-13 14:16:33,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:16:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:16:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2022-12-13 14:16:33,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49707602339181284 [2022-12-13 14:16:33,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2022-12-13 14:16:33,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2022-12-13 14:16:33,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:33,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2022-12-13 14:16:33,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:33,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:33,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:33,717 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 401 flow. Second operand 3 states and 595 transitions. [2022-12-13 14:16:33,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 450 flow [2022-12-13 14:16:33,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 420 flow, removed 11 selfloop flow, removed 6 redundant places. [2022-12-13 14:16:33,722 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 280 flow [2022-12-13 14:16:33,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2022-12-13 14:16:33,722 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2022-12-13 14:16:33,722 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 280 flow [2022-12-13 14:16:33,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:33,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:33,723 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:33,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 14:16:33,723 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:33,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:33,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1966830486, now seen corresponding path program 1 times [2022-12-13 14:16:33,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:33,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286186930] [2022-12-13 14:16:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:33,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:34,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:34,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286186930] [2022-12-13 14:16:34,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286186930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:34,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:34,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 14:16:34,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116684114] [2022-12-13 14:16:34,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:34,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 14:16:34,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:34,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 14:16:34,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:16:34,650 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 399 [2022-12-13 14:16:34,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 280 flow. Second operand has 12 states, 12 states have (on average 165.66666666666666) internal successors, (1988), 12 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:34,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:34,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 399 [2022-12-13 14:16:34,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:35,138 INFO L130 PetriNetUnfolder]: 866/1591 cut-off events. [2022-12-13 14:16:35,139 INFO L131 PetriNetUnfolder]: For 714/714 co-relation queries the response was YES. [2022-12-13 14:16:35,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4364 conditions, 1591 events. 866/1591 cut-off events. For 714/714 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7220 event pairs, 163 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 4347. Up to 1024 conditions per place. [2022-12-13 14:16:35,143 INFO L137 encePairwiseOnDemand]: 388/399 looper letters, 129 selfloop transitions, 13 changer transitions 0/142 dead transitions. [2022-12-13 14:16:35,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 142 transitions, 818 flow [2022-12-13 14:16:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 14:16:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 14:16:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1939 transitions. [2022-12-13 14:16:35,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44178628389154706 [2022-12-13 14:16:35,148 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1939 transitions. [2022-12-13 14:16:35,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1939 transitions. [2022-12-13 14:16:35,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:35,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1939 transitions. [2022-12-13 14:16:35,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 176.27272727272728) internal successors, (1939), 11 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 399.0) internal successors, (4788), 12 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,159 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 399.0) internal successors, (4788), 12 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,159 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 280 flow. Second operand 11 states and 1939 transitions. [2022-12-13 14:16:35,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 142 transitions, 818 flow [2022-12-13 14:16:35,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 142 transitions, 801 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:16:35,164 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 340 flow [2022-12-13 14:16:35,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=340, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2022-12-13 14:16:35,165 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 28 predicate places. [2022-12-13 14:16:35,165 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 340 flow [2022-12-13 14:16:35,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 165.66666666666666) internal successors, (1988), 12 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:35,166 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:35,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 14:16:35,166 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:35,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:35,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1485610025, now seen corresponding path program 1 times [2022-12-13 14:16:35,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:35,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857064359] [2022-12-13 14:16:35,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:35,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:35,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:35,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857064359] [2022-12-13 14:16:35,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857064359] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:35,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:35,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:16:35,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887188976] [2022-12-13 14:16:35,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:35,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:16:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:35,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:16:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:16:35,384 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 399 [2022-12-13 14:16:35,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 63 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 180.33333333333334) internal successors, (1082), 6 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:35,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 399 [2022-12-13 14:16:35,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:35,631 INFO L130 PetriNetUnfolder]: 945/1729 cut-off events. [2022-12-13 14:16:35,631 INFO L131 PetriNetUnfolder]: For 943/943 co-relation queries the response was YES. [2022-12-13 14:16:35,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4921 conditions, 1729 events. 945/1729 cut-off events. For 943/943 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7966 event pairs, 115 based on Foata normal form. 0/1705 useless extension candidates. Maximal degree in co-relation 4900. Up to 862 conditions per place. [2022-12-13 14:16:35,636 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 92 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2022-12-13 14:16:35,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 682 flow [2022-12-13 14:16:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:16:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 14:16:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1316 transitions. [2022-12-13 14:16:35,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47117794486215536 [2022-12-13 14:16:35,638 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1316 transitions. [2022-12-13 14:16:35,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1316 transitions. [2022-12-13 14:16:35,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:35,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1316 transitions. [2022-12-13 14:16:35,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 399.0) internal successors, (3192), 8 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,642 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 399.0) internal successors, (3192), 8 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,642 INFO L175 Difference]: Start difference. First operand has 77 places, 63 transitions, 340 flow. Second operand 7 states and 1316 transitions. [2022-12-13 14:16:35,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 682 flow [2022-12-13 14:16:35,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 100 transitions, 672 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 14:16:35,646 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 367 flow [2022-12-13 14:16:35,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=367, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2022-12-13 14:16:35,646 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 30 predicate places. [2022-12-13 14:16:35,646 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 367 flow [2022-12-13 14:16:35,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 180.33333333333334) internal successors, (1082), 6 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:35,647 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:35,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 14:16:35,647 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:35,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash 722680447, now seen corresponding path program 1 times [2022-12-13 14:16:35,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:35,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202965261] [2022-12-13 14:16:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:35,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:16:35,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:35,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202965261] [2022-12-13 14:16:35,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202965261] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:35,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:35,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:16:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241410688] [2022-12-13 14:16:35,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:35,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:16:35,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:35,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:16:35,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:16:35,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 399 [2022-12-13 14:16:35,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 367 flow. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:35,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 399 [2022-12-13 14:16:35,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:35,910 INFO L130 PetriNetUnfolder]: 1216/2260 cut-off events. [2022-12-13 14:16:35,910 INFO L131 PetriNetUnfolder]: For 1657/1657 co-relation queries the response was YES. [2022-12-13 14:16:35,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6539 conditions, 2260 events. 1216/2260 cut-off events. For 1657/1657 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 11572 event pairs, 734 based on Foata normal form. 84/2296 useless extension candidates. Maximal degree in co-relation 6516. Up to 1692 conditions per place. [2022-12-13 14:16:35,918 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 108 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2022-12-13 14:16:35,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 845 flow [2022-12-13 14:16:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:16:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:16:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2022-12-13 14:16:35,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5171261487050961 [2022-12-13 14:16:35,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2022-12-13 14:16:35,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2022-12-13 14:16:35,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:35,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2022-12-13 14:16:35,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,922 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 367 flow. Second operand 3 states and 619 transitions. [2022-12-13 14:16:35,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 845 flow [2022-12-13 14:16:35,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 111 transitions, 837 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 14:16:35,927 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 383 flow [2022-12-13 14:16:35,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=383, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2022-12-13 14:16:35,928 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 30 predicate places. [2022-12-13 14:16:35,928 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 383 flow [2022-12-13 14:16:35,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:35,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:35,928 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:35,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 14:16:35,928 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2086359070, now seen corresponding path program 1 times [2022-12-13 14:16:35,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971637379] [2022-12-13 14:16:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:35,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:36,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:36,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971637379] [2022-12-13 14:16:36,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971637379] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:36,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:36,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 14:16:36,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159746374] [2022-12-13 14:16:36,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:36,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:16:36,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:36,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:16:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:16:37,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 399 [2022-12-13 14:16:37,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 67 transitions, 383 flow. Second operand has 14 states, 14 states have (on average 158.57142857142858) internal successors, (2220), 14 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:37,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:37,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 399 [2022-12-13 14:16:37,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:38,424 INFO L130 PetriNetUnfolder]: 1483/2758 cut-off events. [2022-12-13 14:16:38,424 INFO L131 PetriNetUnfolder]: For 2131/2131 co-relation queries the response was YES. [2022-12-13 14:16:38,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8440 conditions, 2758 events. 1483/2758 cut-off events. For 2131/2131 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 14415 event pairs, 382 based on Foata normal form. 12/2770 useless extension candidates. Maximal degree in co-relation 8416. Up to 2087 conditions per place. [2022-12-13 14:16:38,433 INFO L137 encePairwiseOnDemand]: 383/399 looper letters, 145 selfloop transitions, 29 changer transitions 0/174 dead transitions. [2022-12-13 14:16:38,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 174 transitions, 1150 flow [2022-12-13 14:16:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 14:16:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 14:16:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2816 transitions. [2022-12-13 14:16:38,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41515553589856996 [2022-12-13 14:16:38,437 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2816 transitions. [2022-12-13 14:16:38,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2816 transitions. [2022-12-13 14:16:38,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:38,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2816 transitions. [2022-12-13 14:16:38,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 165.64705882352942) internal successors, (2816), 17 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:38,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 399.0) internal successors, (7182), 18 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:38,445 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 399.0) internal successors, (7182), 18 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:38,445 INFO L175 Difference]: Start difference. First operand has 79 places, 67 transitions, 383 flow. Second operand 17 states and 2816 transitions. [2022-12-13 14:16:38,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 174 transitions, 1150 flow [2022-12-13 14:16:38,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 174 transitions, 1137 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:16:38,451 INFO L231 Difference]: Finished difference. Result has 100 places, 91 transitions, 591 flow [2022-12-13 14:16:38,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=591, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2022-12-13 14:16:38,451 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 51 predicate places. [2022-12-13 14:16:38,452 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 591 flow [2022-12-13 14:16:38,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 158.57142857142858) internal successors, (2220), 14 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:38,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:38,452 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:38,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 14:16:38,452 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:38,452 INFO L85 PathProgramCache]: Analyzing trace with hash 100874720, now seen corresponding path program 2 times [2022-12-13 14:16:38,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:38,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498198949] [2022-12-13 14:16:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:38,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:39,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:39,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498198949] [2022-12-13 14:16:39,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498198949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:39,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:39,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 14:16:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762068245] [2022-12-13 14:16:39,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:39,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 14:16:39,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 14:16:39,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:16:40,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 399 [2022-12-13 14:16:40,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 591 flow. Second operand has 15 states, 15 states have (on average 154.46666666666667) internal successors, (2317), 15 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:40,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:40,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 399 [2022-12-13 14:16:40,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:41,485 INFO L130 PetriNetUnfolder]: 1740/3236 cut-off events. [2022-12-13 14:16:41,486 INFO L131 PetriNetUnfolder]: For 2687/2687 co-relation queries the response was YES. [2022-12-13 14:16:41,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10439 conditions, 3236 events. 1740/3236 cut-off events. For 2687/2687 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 17606 event pairs, 479 based on Foata normal form. 12/3248 useless extension candidates. Maximal degree in co-relation 10409. Up to 2107 conditions per place. [2022-12-13 14:16:41,502 INFO L137 encePairwiseOnDemand]: 383/399 looper letters, 146 selfloop transitions, 34 changer transitions 0/180 dead transitions. [2022-12-13 14:16:41,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 180 transitions, 1311 flow [2022-12-13 14:16:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:16:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 14:16:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2125 transitions. [2022-12-13 14:16:41,510 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40967804125698865 [2022-12-13 14:16:41,510 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2125 transitions. [2022-12-13 14:16:41,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2125 transitions. [2022-12-13 14:16:41,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:41,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2125 transitions. [2022-12-13 14:16:41,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 163.46153846153845) internal successors, (2125), 13 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:41,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:41,525 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:41,525 INFO L175 Difference]: Start difference. First operand has 100 places, 91 transitions, 591 flow. Second operand 13 states and 2125 transitions. [2022-12-13 14:16:41,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 180 transitions, 1311 flow [2022-12-13 14:16:41,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 180 transitions, 1300 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 14:16:41,543 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 784 flow [2022-12-13 14:16:41,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=784, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2022-12-13 14:16:41,543 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 66 predicate places. [2022-12-13 14:16:41,543 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 784 flow [2022-12-13 14:16:41,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 154.46666666666667) internal successors, (2317), 15 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:41,544 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:41,544 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:41,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 14:16:41,544 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:41,545 INFO L85 PathProgramCache]: Analyzing trace with hash 710974070, now seen corresponding path program 3 times [2022-12-13 14:16:41,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:41,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187532824] [2022-12-13 14:16:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:41,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:42,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:42,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187532824] [2022-12-13 14:16:42,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187532824] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:42,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:42,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 14:16:42,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263704625] [2022-12-13 14:16:42,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:42,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 14:16:42,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:42,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 14:16:42,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:16:43,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 399 [2022-12-13 14:16:43,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 784 flow. Second operand has 15 states, 15 states have (on average 154.46666666666667) internal successors, (2317), 15 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:43,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:43,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 399 [2022-12-13 14:16:43,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:44,330 INFO L130 PetriNetUnfolder]: 1728/3212 cut-off events. [2022-12-13 14:16:44,331 INFO L131 PetriNetUnfolder]: For 3740/3740 co-relation queries the response was YES. [2022-12-13 14:16:44,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11051 conditions, 3212 events. 1728/3212 cut-off events. For 3740/3740 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 17397 event pairs, 443 based on Foata normal form. 12/3224 useless extension candidates. Maximal degree in co-relation 11014. Up to 1623 conditions per place. [2022-12-13 14:16:44,343 INFO L137 encePairwiseOnDemand]: 383/399 looper letters, 137 selfloop transitions, 45 changer transitions 0/182 dead transitions. [2022-12-13 14:16:44,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 182 transitions, 1451 flow [2022-12-13 14:16:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 14:16:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 14:16:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2278 transitions. [2022-12-13 14:16:44,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4078052273540995 [2022-12-13 14:16:44,346 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2278 transitions. [2022-12-13 14:16:44,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2278 transitions. [2022-12-13 14:16:44,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:44,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2278 transitions. [2022-12-13 14:16:44,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 162.71428571428572) internal successors, (2278), 14 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:44,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:44,370 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:44,370 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 784 flow. Second operand 14 states and 2278 transitions. [2022-12-13 14:16:44,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 182 transitions, 1451 flow [2022-12-13 14:16:44,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 182 transitions, 1404 flow, removed 14 selfloop flow, removed 5 redundant places. [2022-12-13 14:16:44,396 INFO L231 Difference]: Finished difference. Result has 127 places, 109 transitions, 933 flow [2022-12-13 14:16:44,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=933, PETRI_PLACES=127, PETRI_TRANSITIONS=109} [2022-12-13 14:16:44,397 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 78 predicate places. [2022-12-13 14:16:44,397 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 933 flow [2022-12-13 14:16:44,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 154.46666666666667) internal successors, (2317), 15 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:44,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:44,398 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 14:16:44,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 14:16:44,398 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:44,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:44,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1091114900, now seen corresponding path program 1 times [2022-12-13 14:16:44,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:44,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14804255] [2022-12-13 14:16:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:44,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:44,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:44,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14804255] [2022-12-13 14:16:44,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14804255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:16:44,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475103465] [2022-12-13 14:16:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:44,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:16:44,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:16:44,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:16:44,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:16:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:16:44,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:16:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:44,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:16:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:44,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475103465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:16:44,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:16:44,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-12-13 14:16:44,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111311503] [2022-12-13 14:16:44,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:16:44,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:16:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:44,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:16:44,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:16:44,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 399 [2022-12-13 14:16:44,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 109 transitions, 933 flow. Second operand has 14 states, 14 states have (on average 181.78571428571428) internal successors, (2545), 14 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:44,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:44,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 399 [2022-12-13 14:16:44,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:45,543 INFO L130 PetriNetUnfolder]: 2436/4518 cut-off events. [2022-12-13 14:16:45,543 INFO L131 PetriNetUnfolder]: For 5981/5981 co-relation queries the response was YES. [2022-12-13 14:16:45,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15757 conditions, 4518 events. 2436/4518 cut-off events. For 5981/5981 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 23211 event pairs, 637 based on Foata normal form. 46/4564 useless extension candidates. Maximal degree in co-relation 15715. Up to 1423 conditions per place. [2022-12-13 14:16:45,561 INFO L137 encePairwiseOnDemand]: 391/399 looper letters, 237 selfloop transitions, 46 changer transitions 0/283 dead transitions. [2022-12-13 14:16:45,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 283 transitions, 2345 flow [2022-12-13 14:16:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:16:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 14:16:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2520 transitions. [2022-12-13 14:16:45,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48582995951417 [2022-12-13 14:16:45,563 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2520 transitions. [2022-12-13 14:16:45,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2520 transitions. [2022-12-13 14:16:45,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:45,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2520 transitions. [2022-12-13 14:16:45,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.84615384615384) internal successors, (2520), 13 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:45,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:45,569 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:45,569 INFO L175 Difference]: Start difference. First operand has 127 places, 109 transitions, 933 flow. Second operand 13 states and 2520 transitions. [2022-12-13 14:16:45,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 283 transitions, 2345 flow [2022-12-13 14:16:45,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 283 transitions, 2280 flow, removed 14 selfloop flow, removed 8 redundant places. [2022-12-13 14:16:45,587 INFO L231 Difference]: Finished difference. Result has 136 places, 133 transitions, 1239 flow [2022-12-13 14:16:45,588 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1239, PETRI_PLACES=136, PETRI_TRANSITIONS=133} [2022-12-13 14:16:45,588 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 87 predicate places. [2022-12-13 14:16:45,588 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 133 transitions, 1239 flow [2022-12-13 14:16:45,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 181.78571428571428) internal successors, (2545), 14 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:45,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:45,588 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:45,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:16:45,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:16:45,789 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:45,790 INFO L85 PathProgramCache]: Analyzing trace with hash -687660124, now seen corresponding path program 1 times [2022-12-13 14:16:45,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:45,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530576194] [2022-12-13 14:16:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:45,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:45,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:45,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530576194] [2022-12-13 14:16:45,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530576194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:16:45,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534319161] [2022-12-13 14:16:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:45,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:16:45,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:16:45,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:16:45,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:16:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:16:45,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:16:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:45,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:16:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:45,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534319161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:16:45,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:16:45,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 14:16:45,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093010143] [2022-12-13 14:16:45,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:16:45,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:16:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:45,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:16:45,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:16:45,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 399 [2022-12-13 14:16:45,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 133 transitions, 1239 flow. Second operand has 7 states, 7 states have (on average 188.28571428571428) internal successors, (1318), 7 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:45,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:45,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 399 [2022-12-13 14:16:45,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:47,241 INFO L130 PetriNetUnfolder]: 4753/9023 cut-off events. [2022-12-13 14:16:47,241 INFO L131 PetriNetUnfolder]: For 17894/17894 co-relation queries the response was YES. [2022-12-13 14:16:47,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32961 conditions, 9023 events. 4753/9023 cut-off events. For 17894/17894 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 57064 event pairs, 1071 based on Foata normal form. 1080/10103 useless extension candidates. Maximal degree in co-relation 32913. Up to 2102 conditions per place. [2022-12-13 14:16:47,279 INFO L137 encePairwiseOnDemand]: 394/399 looper letters, 449 selfloop transitions, 22 changer transitions 0/471 dead transitions. [2022-12-13 14:16:47,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 471 transitions, 5384 flow [2022-12-13 14:16:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:16:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:16:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1242 transitions. [2022-12-13 14:16:47,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.518796992481203 [2022-12-13 14:16:47,282 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1242 transitions. [2022-12-13 14:16:47,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1242 transitions. [2022-12-13 14:16:47,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:47,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1242 transitions. [2022-12-13 14:16:47,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:47,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:47,285 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:47,285 INFO L175 Difference]: Start difference. First operand has 136 places, 133 transitions, 1239 flow. Second operand 6 states and 1242 transitions. [2022-12-13 14:16:47,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 471 transitions, 5384 flow [2022-12-13 14:16:47,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 471 transitions, 5074 flow, removed 155 selfloop flow, removed 0 redundant places. [2022-12-13 14:16:47,354 INFO L231 Difference]: Finished difference. Result has 145 places, 144 transitions, 1368 flow [2022-12-13 14:16:47,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1368, PETRI_PLACES=145, PETRI_TRANSITIONS=144} [2022-12-13 14:16:47,354 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 96 predicate places. [2022-12-13 14:16:47,354 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 144 transitions, 1368 flow [2022-12-13 14:16:47,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 188.28571428571428) internal successors, (1318), 7 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:47,355 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:47,355 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:47,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:16:47,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 14:16:47,556 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:47,557 INFO L85 PathProgramCache]: Analyzing trace with hash 504568613, now seen corresponding path program 1 times [2022-12-13 14:16:47,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:47,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630342176] [2022-12-13 14:16:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:47,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:47,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630342176] [2022-12-13 14:16:47,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630342176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:16:47,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344839352] [2022-12-13 14:16:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:47,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:16:47,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:16:47,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:16:47,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:16:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:47,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:16:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:16:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:16:47,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:16:47,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344839352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:47,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:16:47,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-12-13 14:16:47,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262095400] [2022-12-13 14:16:47,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:47,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:16:47,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:47,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:16:47,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:16:47,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 399 [2022-12-13 14:16:47,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 144 transitions, 1368 flow. Second operand has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:47,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:47,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 399 [2022-12-13 14:16:47,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:49,360 INFO L130 PetriNetUnfolder]: 5136/9754 cut-off events. [2022-12-13 14:16:49,361 INFO L131 PetriNetUnfolder]: For 22785/22785 co-relation queries the response was YES. [2022-12-13 14:16:49,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37461 conditions, 9754 events. 5136/9754 cut-off events. For 22785/22785 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 62160 event pairs, 1792 based on Foata normal form. 48/9802 useless extension candidates. Maximal degree in co-relation 37409. Up to 4190 conditions per place. [2022-12-13 14:16:49,440 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 186 selfloop transitions, 37 changer transitions 0/223 dead transitions. [2022-12-13 14:16:49,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 223 transitions, 2282 flow [2022-12-13 14:16:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:16:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 14:16:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1355 transitions. [2022-12-13 14:16:49,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48514142499104906 [2022-12-13 14:16:49,442 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1355 transitions. [2022-12-13 14:16:49,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1355 transitions. [2022-12-13 14:16:49,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:49,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1355 transitions. [2022-12-13 14:16:49,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 193.57142857142858) internal successors, (1355), 7 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:49,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 399.0) internal successors, (3192), 8 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:49,447 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 399.0) internal successors, (3192), 8 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:49,447 INFO L175 Difference]: Start difference. First operand has 145 places, 144 transitions, 1368 flow. Second operand 7 states and 1355 transitions. [2022-12-13 14:16:49,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 223 transitions, 2282 flow [2022-12-13 14:16:49,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 223 transitions, 2214 flow, removed 28 selfloop flow, removed 1 redundant places. [2022-12-13 14:16:49,506 INFO L231 Difference]: Finished difference. Result has 152 places, 153 transitions, 1527 flow [2022-12-13 14:16:49,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1527, PETRI_PLACES=152, PETRI_TRANSITIONS=153} [2022-12-13 14:16:49,506 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 103 predicate places. [2022-12-13 14:16:49,506 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 153 transitions, 1527 flow [2022-12-13 14:16:49,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:49,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:49,507 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:49,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:16:49,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 14:16:49,708 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:49,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash -537474311, now seen corresponding path program 1 times [2022-12-13 14:16:49,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:49,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439661728] [2022-12-13 14:16:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:49,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:49,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439661728] [2022-12-13 14:16:49,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439661728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:49,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:16:49,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:16:49,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241180702] [2022-12-13 14:16:49,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:49,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:16:49,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:49,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:16:49,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:16:50,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 399 [2022-12-13 14:16:50,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 153 transitions, 1527 flow. Second operand has 7 states, 7 states have (on average 177.57142857142858) internal successors, (1243), 7 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:50,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:50,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 399 [2022-12-13 14:16:50,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:51,862 INFO L130 PetriNetUnfolder]: 5861/11070 cut-off events. [2022-12-13 14:16:51,862 INFO L131 PetriNetUnfolder]: For 27200/27200 co-relation queries the response was YES. [2022-12-13 14:16:51,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42572 conditions, 11070 events. 5861/11070 cut-off events. For 27200/27200 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 72090 event pairs, 1097 based on Foata normal form. 56/11126 useless extension candidates. Maximal degree in co-relation 42517. Up to 4491 conditions per place. [2022-12-13 14:16:51,920 INFO L137 encePairwiseOnDemand]: 387/399 looper letters, 240 selfloop transitions, 36 changer transitions 0/276 dead transitions. [2022-12-13 14:16:51,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 276 transitions, 2875 flow [2022-12-13 14:16:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:16:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 14:16:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1879 transitions. [2022-12-13 14:16:51,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47092731829573936 [2022-12-13 14:16:51,923 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1879 transitions. [2022-12-13 14:16:51,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1879 transitions. [2022-12-13 14:16:51,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:51,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1879 transitions. [2022-12-13 14:16:51,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 187.9) internal successors, (1879), 10 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:51,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 399.0) internal successors, (4389), 11 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:51,960 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 399.0) internal successors, (4389), 11 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:51,960 INFO L175 Difference]: Start difference. First operand has 152 places, 153 transitions, 1527 flow. Second operand 10 states and 1879 transitions. [2022-12-13 14:16:51,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 276 transitions, 2875 flow [2022-12-13 14:16:52,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 276 transitions, 2853 flow, removed 11 selfloop flow, removed 0 redundant places. [2022-12-13 14:16:52,041 INFO L231 Difference]: Finished difference. Result has 164 places, 162 transitions, 1723 flow [2022-12-13 14:16:52,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1723, PETRI_PLACES=164, PETRI_TRANSITIONS=162} [2022-12-13 14:16:52,041 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 115 predicate places. [2022-12-13 14:16:52,041 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 162 transitions, 1723 flow [2022-12-13 14:16:52,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 177.57142857142858) internal successors, (1243), 7 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:52,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:52,042 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:52,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 14:16:52,042 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:52,042 INFO L85 PathProgramCache]: Analyzing trace with hash 635876642, now seen corresponding path program 1 times [2022-12-13 14:16:52,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:52,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920023768] [2022-12-13 14:16:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:52,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:52,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920023768] [2022-12-13 14:16:52,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920023768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:16:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171723676] [2022-12-13 14:16:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:52,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:16:52,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:16:52,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:16:52,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:16:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:16:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:16:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:52,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:16:52,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171723676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:16:52,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:16:52,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2022-12-13 14:16:52,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471388919] [2022-12-13 14:16:52,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:16:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:16:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:16:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:16:52,308 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 399 [2022-12-13 14:16:52,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 162 transitions, 1723 flow. Second operand has 7 states, 7 states have (on average 184.71428571428572) internal successors, (1293), 7 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:52,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:52,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 399 [2022-12-13 14:16:52,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:54,086 INFO L130 PetriNetUnfolder]: 5258/10115 cut-off events. [2022-12-13 14:16:54,086 INFO L131 PetriNetUnfolder]: For 31603/31603 co-relation queries the response was YES. [2022-12-13 14:16:54,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39715 conditions, 10115 events. 5258/10115 cut-off events. For 31603/31603 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 65409 event pairs, 1532 based on Foata normal form. 180/10295 useless extension candidates. Maximal degree in co-relation 39656. Up to 3791 conditions per place. [2022-12-13 14:16:54,146 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 204 selfloop transitions, 42 changer transitions 0/246 dead transitions. [2022-12-13 14:16:54,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 246 transitions, 2612 flow [2022-12-13 14:16:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:16:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 14:16:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1579 transitions. [2022-12-13 14:16:54,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49467418546365916 [2022-12-13 14:16:54,149 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1579 transitions. [2022-12-13 14:16:54,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1579 transitions. [2022-12-13 14:16:54,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:54,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1579 transitions. [2022-12-13 14:16:54,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 197.375) internal successors, (1579), 8 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:54,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 399.0) internal successors, (3591), 9 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:54,153 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 399.0) internal successors, (3591), 9 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:54,153 INFO L175 Difference]: Start difference. First operand has 164 places, 162 transitions, 1723 flow. Second operand 8 states and 1579 transitions. [2022-12-13 14:16:54,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 246 transitions, 2612 flow [2022-12-13 14:16:54,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 246 transitions, 2556 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-12-13 14:16:54,232 INFO L231 Difference]: Finished difference. Result has 170 places, 156 transitions, 1710 flow [2022-12-13 14:16:54,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1710, PETRI_PLACES=170, PETRI_TRANSITIONS=156} [2022-12-13 14:16:54,232 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 121 predicate places. [2022-12-13 14:16:54,232 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 156 transitions, 1710 flow [2022-12-13 14:16:54,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.71428571428572) internal successors, (1293), 7 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:54,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:54,233 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:54,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:16:54,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:16:54,434 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:16:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:54,435 INFO L85 PathProgramCache]: Analyzing trace with hash 514677525, now seen corresponding path program 1 times [2022-12-13 14:16:54,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:54,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560977113] [2022-12-13 14:16:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:54,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:16:54,482 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:16:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:16:54,515 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:16:54,515 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:16:54,516 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-12-13 14:16:54,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-12-13 14:16:54,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-12-13 14:16:54,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-12-13 14:16:54,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-12-13 14:16:54,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-12-13 14:16:54,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-12-13 14:16:54,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-12-13 14:16:54,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-12-13 14:16:54,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2022-12-13 14:16:54,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2022-12-13 14:16:54,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2022-12-13 14:16:54,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-12-13 14:16:54,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-12-13 14:16:54,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2022-12-13 14:16:54,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2022-12-13 14:16:54,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-12-13 14:16:54,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-12-13 14:16:54,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-12-13 14:16:54,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-12-13 14:16:54,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2022-12-13 14:16:54,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-12-13 14:16:54,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-12-13 14:16:54,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 14:16:54,519 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:54,524 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 14:16:54,524 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 14:16:54,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 02:16:54 BasicIcfg [2022-12-13 14:16:54,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 14:16:54,555 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 14:16:54,555 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 14:16:54,555 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 14:16:54,555 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:16:21" (3/4) ... [2022-12-13 14:16:54,557 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 14:16:54,557 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 14:16:54,557 INFO L158 Benchmark]: Toolchain (without parser) took 34231.87ms. Allocated memory was 159.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 116.7MB in the beginning and 330.9MB in the end (delta: -214.3MB). Peak memory consumption was 907.6MB. Max. memory is 16.1GB. [2022-12-13 14:16:54,557 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 119.5MB. Free memory is still 90.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:16:54,558 INFO L158 Benchmark]: CACSL2BoogieTranslator took 465.96ms. Allocated memory is still 159.4MB. Free memory was 116.7MB in the beginning and 87.3MB in the end (delta: 29.3MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-12-13 14:16:54,558 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.59ms. Allocated memory is still 159.4MB. Free memory was 87.3MB in the beginning and 84.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-13 14:16:54,558 INFO L158 Benchmark]: Boogie Preprocessor took 32.86ms. Allocated memory is still 159.4MB. Free memory was 84.6MB in the beginning and 83.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:16:54,558 INFO L158 Benchmark]: RCFGBuilder took 413.92ms. Allocated memory is still 159.4MB. Free memory was 82.5MB in the beginning and 119.6MB in the end (delta: -37.1MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2022-12-13 14:16:54,559 INFO L158 Benchmark]: TraceAbstraction took 33276.34ms. Allocated memory was 159.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 118.9MB in the beginning and 332.0MB in the end (delta: -213.0MB). Peak memory consumption was 907.2MB. Max. memory is 16.1GB. [2022-12-13 14:16:54,559 INFO L158 Benchmark]: Witness Printer took 2.43ms. Allocated memory is still 1.3GB. Free memory was 332.0MB in the beginning and 330.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:16:54,560 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 119.5MB. Free memory is still 90.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 465.96ms. Allocated memory is still 159.4MB. Free memory was 116.7MB in the beginning and 87.3MB in the end (delta: 29.3MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.59ms. Allocated memory is still 159.4MB. Free memory was 87.3MB in the beginning and 84.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.86ms. Allocated memory is still 159.4MB. Free memory was 84.6MB in the beginning and 83.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 413.92ms. Allocated memory is still 159.4MB. Free memory was 82.5MB in the beginning and 119.6MB in the end (delta: -37.1MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. * TraceAbstraction took 33276.34ms. Allocated memory was 159.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 118.9MB in the beginning and 332.0MB in the end (delta: -213.0MB). Peak memory consumption was 907.2MB. Max. memory is 16.1GB. * Witness Printer took 2.43ms. Allocated memory is still 1.3GB. Free memory was 332.0MB in the beginning and 330.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 189 PlacesBefore, 49 PlacesAfterwards, 192 TransitionsBefore, 47 TransitionsAfterwards, 11140 CoEnabledTransitionPairs, 6 FixpointIterations, 50 TrivialSequentialCompositions, 122 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 5 ChoiceCompositions, 200 TotalNumberOfCompositions, 15283 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12416, independent: 12213, independent conditional: 0, independent unconditional: 12213, dependent: 203, dependent conditional: 0, dependent unconditional: 203, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6404, independent: 6342, independent conditional: 0, independent unconditional: 6342, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 12416, independent: 5871, independent conditional: 0, independent unconditional: 5871, dependent: 141, dependent conditional: 0, dependent unconditional: 141, unknown: 6404, unknown conditional: 0, unknown unconditional: 6404] , Statistics on independence cache: Total cache size (in pairs): 313, Positive cache size: 291, Positive conditional cache size: 0, Positive unconditional cache size: 291, Negative cache size: 22, Negative conditional cache size: 0, Negative unconditional cache size: 22, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={7:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={7:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L962] COND FALSE 1 !(top==(5)) VAL [\old(x)=4, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=4] [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x VAL [\old(x)=4, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=4] [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=4, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=4, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 312 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 33.1s, OverallIterations: 25, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 22.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6397 SdHoareTripleChecker+Valid, 11.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5423 mSDsluCounter, 7668 SdHoareTripleChecker+Invalid, 9.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7303 mSDsCounter, 191 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25001 IncrementalHoareTripleChecker+Invalid, 25192 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 191 mSolverCounterUnsat, 365 mSDtfsCounter, 25001 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 356 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1723occurred in iteration=23, InterpolantAutomatonStates: 162, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 486 NumberOfCodeBlocks, 486 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 488 ConstructedInterpolants, 0 QuantifiedInterpolants, 3458 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1277 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 32 InterpolantComputations, 21 PerfectInterpolantSequences, 25/83 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 14:16:54,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 14:16:56,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:16:56,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:16:56,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:16:56,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:16:56,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:16:56,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:16:56,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:16:56,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:16:56,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:16:56,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:16:56,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:16:56,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:16:56,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:16:56,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:16:56,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:16:56,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:16:56,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:16:56,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:16:56,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:16:56,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:16:56,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:16:56,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:16:56,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:16:56,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:16:56,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:16:56,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:16:56,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:16:56,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:16:56,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:16:56,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:16:56,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:16:56,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:16:56,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:16:56,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:16:56,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:16:56,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:16:56,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:16:56,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:16:56,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:16:56,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:16:56,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 14:16:56,209 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:16:56,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:16:56,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:16:56,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:16:56,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:16:56,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:16:56,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:16:56,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:16:56,211 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:16:56,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:16:56,211 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:16:56,211 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:16:56,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:16:56,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:16:56,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:16:56,212 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:16:56,212 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:16:56,212 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:16:56,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:16:56,212 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:16:56,213 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 14:16:56,213 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 14:16:56,213 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:16:56,213 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:16:56,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:16:56,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:16:56,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:16:56,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:16:56,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:16:56,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:16:56,214 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 14:16:56,215 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 14:16:56,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:16:56,215 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:16:56,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:16:56,215 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 14:16:56,215 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:16:56,216 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2022-12-13 14:16:56,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:16:56,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:16:56,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:16:56,441 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:16:56,441 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:16:56,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/stack-2.i [2022-12-13 14:16:59,071 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:16:59,276 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:16:59,276 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/sv-benchmarks/c/pthread/stack-2.i [2022-12-13 14:16:59,288 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/data/e6b8cb75c/cb3c7e8dd41742ab90efe982ed32bf13/FLAG59aad345a [2022-12-13 14:16:59,299 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/data/e6b8cb75c/cb3c7e8dd41742ab90efe982ed32bf13 [2022-12-13 14:16:59,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:16:59,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:16:59,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:16:59,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:16:59,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:16:59,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c082b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59, skipping insertion in model container [2022-12-13 14:16:59,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:16:59,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:16:59,730 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_db61750f-aa2b-4729-b91b-ece5c4e89b65/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-12-13 14:16:59,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:16:59,771 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:16:59,805 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_db61750f-aa2b-4729-b91b-ece5c4e89b65/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-12-13 14:16:59,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:16:59,873 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:16:59,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59 WrapperNode [2022-12-13 14:16:59,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:16:59,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:16:59,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:16:59,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:16:59,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,909 INFO L138 Inliner]: procedures = 281, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-12-13 14:16:59,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:16:59,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:16:59,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:16:59,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:16:59,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:16:59,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:16:59,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:16:59,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:16:59,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (1/1) ... [2022-12-13 14:16:59,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:16:59,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:16:59,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:16:59,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:16:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 14:16:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 14:16:59,996 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 14:16:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 14:16:59,996 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 14:16:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:16:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:16:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 14:16:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 14:16:59,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-12-13 14:16:59,997 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 14:16:59,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:16:59,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:16:59,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:16:59,998 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 14:17:00,122 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:17:00,124 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:17:00,408 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:17:00,416 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:17:00,416 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 14:17:00,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:17:00 BoogieIcfgContainer [2022-12-13 14:17:00,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:17:00,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:17:00,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:17:00,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:17:00,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:16:59" (1/3) ... [2022-12-13 14:17:00,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463ca4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:17:00, skipping insertion in model container [2022-12-13 14:17:00,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:16:59" (2/3) ... [2022-12-13 14:17:00,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463ca4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:17:00, skipping insertion in model container [2022-12-13 14:17:00,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:17:00" (3/3) ... [2022-12-13 14:17:00,427 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2022-12-13 14:17:00,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:17:00,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-13 14:17:00,442 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:17:00,529 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:17:00,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 195 transitions, 406 flow [2022-12-13 14:17:00,628 INFO L130 PetriNetUnfolder]: 10/193 cut-off events. [2022-12-13 14:17:00,629 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:17:00,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 193 events. 10/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 489 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 138. Up to 3 conditions per place. [2022-12-13 14:17:00,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 195 transitions, 406 flow [2022-12-13 14:17:00,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 188 transitions, 388 flow [2022-12-13 14:17:00,640 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:17:00,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 188 transitions, 388 flow [2022-12-13 14:17:00,650 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 188 transitions, 388 flow [2022-12-13 14:17:00,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 188 transitions, 388 flow [2022-12-13 14:17:00,681 INFO L130 PetriNetUnfolder]: 10/188 cut-off events. [2022-12-13 14:17:00,681 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:17:00,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 188 events. 10/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 468 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 138. Up to 3 conditions per place. [2022-12-13 14:17:00,684 INFO L119 LiptonReduction]: Number of co-enabled transitions 10398 [2022-12-13 14:17:12,737 INFO L134 LiptonReduction]: Checked pairs total: 16613 [2022-12-13 14:17:12,737 INFO L136 LiptonReduction]: Total number of compositions: 191 [2022-12-13 14:17:12,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:17:12,759 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@63f7bda, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:17:12,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-12-13 14:17:12,760 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 14:17:12,761 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:17:12,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:12,761 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 14:17:12,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash 787, now seen corresponding path program 1 times [2022-12-13 14:17:12,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:12,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565595827] [2022-12-13 14:17:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:12,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:12,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:12,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:12,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 14:17:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 14:17:12,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:12,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:12,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:12,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565595827] [2022-12-13 14:17:12,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565595827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:12,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:12,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 14:17:12,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104432478] [2022-12-13 14:17:12,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:12,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 14:17:12,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:12,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 14:17:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:17:12,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 386 [2022-12-13 14:17:12,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:12,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:12,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 386 [2022-12-13 14:17:12,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:13,229 INFO L130 PetriNetUnfolder]: 1555/2394 cut-off events. [2022-12-13 14:17:13,230 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-12-13 14:17:13,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4835 conditions, 2394 events. 1555/2394 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11049 event pairs, 1267 based on Foata normal form. 0/1340 useless extension candidates. Maximal degree in co-relation 4566. Up to 2395 conditions per place. [2022-12-13 14:17:13,244 INFO L137 encePairwiseOnDemand]: 384/386 looper letters, 45 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2022-12-13 14:17:13,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 192 flow [2022-12-13 14:17:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 14:17:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 14:17:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 415 transitions. [2022-12-13 14:17:13,258 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5375647668393783 [2022-12-13 14:17:13,259 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 415 transitions. [2022-12-13 14:17:13,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 415 transitions. [2022-12-13 14:17:13,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:13,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 415 transitions. [2022-12-13 14:17:13,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:13,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:13,272 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:13,274 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 415 transitions. [2022-12-13 14:17:13,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 192 flow [2022-12-13 14:17:13,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:17:13,279 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2022-12-13 14:17:13,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2022-12-13 14:17:13,284 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2022-12-13 14:17:13,285 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2022-12-13 14:17:13,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:13,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:13,285 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:17:13,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:17:13,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:13,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:13,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash 775449, now seen corresponding path program 1 times [2022-12-13 14:17:13,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:13,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240886610] [2022-12-13 14:17:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:13,488 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:13,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:13,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:13,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 14:17:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:13,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 14:17:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:13,693 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:17:13,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 14:17:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:13,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:13,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:13,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240886610] [2022-12-13 14:17:13,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240886610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:13,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:13,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:17:13,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266410485] [2022-12-13 14:17:13,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:13,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:17:13,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:13,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:17:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:17:13,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 386 [2022-12-13 14:17:13,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:13,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:13,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 386 [2022-12-13 14:17:13,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:14,068 INFO L130 PetriNetUnfolder]: 1525/2337 cut-off events. [2022-12-13 14:17:14,068 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 14:17:14,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 2337 events. 1525/2337 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10692 event pairs, 1242 based on Foata normal form. 0/1321 useless extension candidates. Maximal degree in co-relation 4688. Up to 2336 conditions per place. [2022-12-13 14:17:14,102 INFO L137 encePairwiseOnDemand]: 382/386 looper letters, 41 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-12-13 14:17:14,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 176 flow [2022-12-13 14:17:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:17:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:17:14,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2022-12-13 14:17:14,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5025906735751295 [2022-12-13 14:17:14,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2022-12-13 14:17:14,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2022-12-13 14:17:14,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:14,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2022-12-13 14:17:14,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:14,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:14,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:14,115 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 582 transitions. [2022-12-13 14:17:14,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 176 flow [2022-12-13 14:17:14,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:17:14,118 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2022-12-13 14:17:14,118 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2022-12-13 14:17:14,119 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2022-12-13 14:17:14,119 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2022-12-13 14:17:14,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:14,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:14,120 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:17:14,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 14:17:14,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:14,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash 775448, now seen corresponding path program 1 times [2022-12-13 14:17:14,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:14,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601816642] [2022-12-13 14:17:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:14,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:14,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:14,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:14,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 14:17:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:14,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:17:14,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:14,414 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 14:17:14,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2022-12-13 14:17:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:14,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:14,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:14,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601816642] [2022-12-13 14:17:14,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601816642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:14,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:14,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:17:14,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199660709] [2022-12-13 14:17:14,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:14,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:17:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:14,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:17:14,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:17:14,495 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 386 [2022-12-13 14:17:14,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:14,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:14,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 386 [2022-12-13 14:17:14,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:14,707 INFO L130 PetriNetUnfolder]: 1495/2280 cut-off events. [2022-12-13 14:17:14,707 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 14:17:14,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4580 conditions, 2280 events. 1495/2280 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10319 event pairs, 1217 based on Foata normal form. 0/1302 useless extension candidates. Maximal degree in co-relation 4576. Up to 2279 conditions per place. [2022-12-13 14:17:14,715 INFO L137 encePairwiseOnDemand]: 382/386 looper letters, 39 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-12-13 14:17:14,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 172 flow [2022-12-13 14:17:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:17:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:17:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-12-13 14:17:14,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4905008635578584 [2022-12-13 14:17:14,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-12-13 14:17:14,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-12-13 14:17:14,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:14,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-12-13 14:17:14,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:14,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:14,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:14,723 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 568 transitions. [2022-12-13 14:17:14,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 172 flow [2022-12-13 14:17:14,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:17:14,724 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2022-12-13 14:17:14,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2022-12-13 14:17:14,725 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2022-12-13 14:17:14,725 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2022-12-13 14:17:14,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:14,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:14,726 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:17:14,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 14:17:14,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:14,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:14,927 INFO L85 PathProgramCache]: Analyzing trace with hash 745222765, now seen corresponding path program 1 times [2022-12-13 14:17:14,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:14,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666267881] [2022-12-13 14:17:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:14,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:14,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:14,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:14,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 14:17:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 14:17:14,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:15,017 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 14:17:15,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-12-13 14:17:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:15,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:15,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:15,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666267881] [2022-12-13 14:17:15,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666267881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:15,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:15,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:17:15,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737062976] [2022-12-13 14:17:15,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:15,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:17:15,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:15,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:17:15,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:17:15,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 386 [2022-12-13 14:17:15,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:15,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:15,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 386 [2022-12-13 14:17:15,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:15,289 INFO L130 PetriNetUnfolder]: 1091/1694 cut-off events. [2022-12-13 14:17:15,289 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 14:17:15,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 1694 events. 1091/1694 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7396 event pairs, 880 based on Foata normal form. 0/1046 useless extension candidates. Maximal degree in co-relation 3404. Up to 1693 conditions per place. [2022-12-13 14:17:15,294 INFO L137 encePairwiseOnDemand]: 383/386 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-12-13 14:17:15,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 168 flow [2022-12-13 14:17:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:17:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:17:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-12-13 14:17:15,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48877374784110533 [2022-12-13 14:17:15,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-12-13 14:17:15,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-12-13 14:17:15,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:15,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-12-13 14:17:15,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:15,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:15,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:15,306 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 566 transitions. [2022-12-13 14:17:15,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 168 flow [2022-12-13 14:17:15,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:17:15,308 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2022-12-13 14:17:15,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2022-12-13 14:17:15,308 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2022-12-13 14:17:15,309 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2022-12-13 14:17:15,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:15,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:15,309 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:17:15,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-12-13 14:17:15,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:15,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:15,511 INFO L85 PathProgramCache]: Analyzing trace with hash 745222763, now seen corresponding path program 1 times [2022-12-13 14:17:15,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:15,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776636779] [2022-12-13 14:17:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:15,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:15,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:15,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:15,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 14:17:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:15,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:17:15,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:15,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:15,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776636779] [2022-12-13 14:17:15,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776636779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:15,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:15,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:17:15,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563826695] [2022-12-13 14:17:15,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:15,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:17:15,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:17:15,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:17:15,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 386 [2022-12-13 14:17:15,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:15,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:15,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 386 [2022-12-13 14:17:15,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:16,003 INFO L130 PetriNetUnfolder]: 687/1108 cut-off events. [2022-12-13 14:17:16,003 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 14:17:16,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 1108 events. 687/1108 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4644 event pairs, 543 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 2232. Up to 1107 conditions per place. [2022-12-13 14:17:16,010 INFO L137 encePairwiseOnDemand]: 383/386 looper letters, 37 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-12-13 14:17:16,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 164 flow [2022-12-13 14:17:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:17:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:17:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-12-13 14:17:16,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4905008635578584 [2022-12-13 14:17:16,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-12-13 14:17:16,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-12-13 14:17:16,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:16,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-12-13 14:17:16,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:16,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:16,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:16,016 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 568 transitions. [2022-12-13 14:17:16,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 164 flow [2022-12-13 14:17:16,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:17:16,017 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2022-12-13 14:17:16,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-12-13 14:17:16,017 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2022-12-13 14:17:16,017 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2022-12-13 14:17:16,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:16,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:16,018 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:17:16,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 14:17:16,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:16,220 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1626538495, now seen corresponding path program 1 times [2022-12-13 14:17:16,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:16,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87363252] [2022-12-13 14:17:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:16,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:16,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:16,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:16,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 14:17:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:16,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 14:17:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:16,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:16,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:16,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87363252] [2022-12-13 14:17:16,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87363252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:16,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:16,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:17:16,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432154860] [2022-12-13 14:17:16,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:16,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:17:16,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:16,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:17:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:17:16,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 386 [2022-12-13 14:17:16,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:16,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:16,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 386 [2022-12-13 14:17:16,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:16,571 INFO L130 PetriNetUnfolder]: 1006/1637 cut-off events. [2022-12-13 14:17:16,571 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 14:17:16,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3304 conditions, 1637 events. 1006/1637 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6844 event pairs, 402 based on Foata normal form. 0/1179 useless extension candidates. Maximal degree in co-relation 3300. Up to 1021 conditions per place. [2022-12-13 14:17:16,575 INFO L137 encePairwiseOnDemand]: 381/386 looper letters, 64 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2022-12-13 14:17:16,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 281 flow [2022-12-13 14:17:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:17:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:17:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2022-12-13 14:17:16,577 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5259067357512953 [2022-12-13 14:17:16,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2022-12-13 14:17:16,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2022-12-13 14:17:16,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:16,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2022-12-13 14:17:16,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:16,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:16,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:16,580 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 609 transitions. [2022-12-13 14:17:16,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 67 transitions, 281 flow [2022-12-13 14:17:16,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 67 transitions, 275 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:17:16,582 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 106 flow [2022-12-13 14:17:16,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2022-12-13 14:17:16,582 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2022-12-13 14:17:16,583 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 106 flow [2022-12-13 14:17:16,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:16,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:16,583 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:17:16,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 14:17:16,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:16,784 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1626537827, now seen corresponding path program 1 times [2022-12-13 14:17:16,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:16,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555033323] [2022-12-13 14:17:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:16,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:16,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:16,786 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:16,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 14:17:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:16,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 14:17:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:16,882 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-12-13 14:17:16,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2022-12-13 14:17:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:17,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:17,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:17,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555033323] [2022-12-13 14:17:17,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555033323] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:17,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:17,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:17:17,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691875997] [2022-12-13 14:17:17,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:17,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:17:17,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:17,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:17:17,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:17:17,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 386 [2022-12-13 14:17:17,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:17,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:17,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 386 [2022-12-13 14:17:17,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:17,684 INFO L130 PetriNetUnfolder]: 993/1619 cut-off events. [2022-12-13 14:17:17,684 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-12-13 14:17:17,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1619 events. 993/1619 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6993 event pairs, 271 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 3461. Up to 1459 conditions per place. [2022-12-13 14:17:17,691 INFO L137 encePairwiseOnDemand]: 382/386 looper letters, 54 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2022-12-13 14:17:17,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 261 flow [2022-12-13 14:17:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:17:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:17:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 769 transitions. [2022-12-13 14:17:17,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49805699481865284 [2022-12-13 14:17:17,693 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 769 transitions. [2022-12-13 14:17:17,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 769 transitions. [2022-12-13 14:17:17,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:17,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 769 transitions. [2022-12-13 14:17:17,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:17,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 386.0) internal successors, (1930), 5 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:17,698 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 386.0) internal successors, (1930), 5 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:17,699 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 106 flow. Second operand 4 states and 769 transitions. [2022-12-13 14:17:17,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 261 flow [2022-12-13 14:17:17,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:17:17,701 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 115 flow [2022-12-13 14:17:17,701 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-12-13 14:17:17,702 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2022-12-13 14:17:17,702 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 115 flow [2022-12-13 14:17:17,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:17,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:17,702 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:17:17,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 14:17:17,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:17,904 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:17,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1626537826, now seen corresponding path program 1 times [2022-12-13 14:17:17,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:17,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303617274] [2022-12-13 14:17:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:17,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:17,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:17,906 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:17,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 14:17:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:18,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:17:18,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:17:18,055 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 14:17:18,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-12-13 14:17:18,069 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 14:17:18,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 14:17:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:18,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:18,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303617274] [2022-12-13 14:17:18,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303617274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:18,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:18,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:17:18,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213570615] [2022-12-13 14:17:18,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:18,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:17:18,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:18,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:17:18,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:17:18,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 386 [2022-12-13 14:17:18,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:18,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:18,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 386 [2022-12-13 14:17:18,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:18,956 INFO L130 PetriNetUnfolder]: 1102/1795 cut-off events. [2022-12-13 14:17:18,956 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2022-12-13 14:17:18,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3884 conditions, 1795 events. 1102/1795 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7798 event pairs, 355 based on Foata normal form. 0/1437 useless extension candidates. Maximal degree in co-relation 3878. Up to 1408 conditions per place. [2022-12-13 14:17:18,961 INFO L137 encePairwiseOnDemand]: 382/386 looper letters, 72 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2022-12-13 14:17:18,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 75 transitions, 341 flow [2022-12-13 14:17:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:17:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:17:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 786 transitions. [2022-12-13 14:17:18,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5090673575129534 [2022-12-13 14:17:18,963 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 786 transitions. [2022-12-13 14:17:18,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 786 transitions. [2022-12-13 14:17:18,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:18,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 786 transitions. [2022-12-13 14:17:18,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:18,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 386.0) internal successors, (1930), 5 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:18,966 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 386.0) internal successors, (1930), 5 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:18,966 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 115 flow. Second operand 4 states and 786 transitions. [2022-12-13 14:17:18,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 75 transitions, 341 flow [2022-12-13 14:17:18,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 75 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:17:18,967 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 128 flow [2022-12-13 14:17:18,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2022-12-13 14:17:18,968 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2022-12-13 14:17:18,968 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 128 flow [2022-12-13 14:17:18,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:18,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:18,968 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:18,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 14:17:19,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:19,169 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:19,171 INFO L85 PathProgramCache]: Analyzing trace with hash -966646994, now seen corresponding path program 1 times [2022-12-13 14:17:19,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:19,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885086016] [2022-12-13 14:17:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:19,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:19,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:19,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:19,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 14:17:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:19,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 14:17:19,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:19,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:19,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:19,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885086016] [2022-12-13 14:17:19,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885086016] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:19,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:19,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:17:19,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632450915] [2022-12-13 14:17:19,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:19,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:17:19,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:19,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:17:19,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:17:19,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 386 [2022-12-13 14:17:19,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:19,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:19,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 386 [2022-12-13 14:17:19,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:19,523 INFO L130 PetriNetUnfolder]: 1298/2137 cut-off events. [2022-12-13 14:17:19,523 INFO L131 PetriNetUnfolder]: For 277/277 co-relation queries the response was YES. [2022-12-13 14:17:19,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 2137 events. 1298/2137 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9883 event pairs, 631 based on Foata normal form. 0/1793 useless extension candidates. Maximal degree in co-relation 4684. Up to 1352 conditions per place. [2022-12-13 14:17:19,529 INFO L137 encePairwiseOnDemand]: 382/386 looper letters, 65 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2022-12-13 14:17:19,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 68 transitions, 330 flow [2022-12-13 14:17:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:17:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:17:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2022-12-13 14:17:19,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5207253886010362 [2022-12-13 14:17:19,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2022-12-13 14:17:19,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2022-12-13 14:17:19,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:19,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2022-12-13 14:17:19,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:19,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:19,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:19,533 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 128 flow. Second operand 3 states and 603 transitions. [2022-12-13 14:17:19,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 68 transitions, 330 flow [2022-12-13 14:17:19,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:17:19,535 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 146 flow [2022-12-13 14:17:19,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2022-12-13 14:17:19,536 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2022-12-13 14:17:19,536 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 146 flow [2022-12-13 14:17:19,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:19,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:19,537 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:19,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 14:17:19,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:19,738 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:19,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1581944943, now seen corresponding path program 1 times [2022-12-13 14:17:19,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:19,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717577400] [2022-12-13 14:17:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:19,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:19,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:19,745 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:19,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 14:17:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:17:19,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:19,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:19,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717577400] [2022-12-13 14:17:19,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717577400] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:19,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:19,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:17:19,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132531198] [2022-12-13 14:17:19,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:19,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:17:19,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:17:19,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:17:19,970 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 386 [2022-12-13 14:17:19,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:19,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:19,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 386 [2022-12-13 14:17:19,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:20,208 INFO L130 PetriNetUnfolder]: 1386/2278 cut-off events. [2022-12-13 14:17:20,208 INFO L131 PetriNetUnfolder]: For 503/503 co-relation queries the response was YES. [2022-12-13 14:17:20,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5351 conditions, 2278 events. 1386/2278 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10822 event pairs, 1014 based on Foata normal form. 62/2088 useless extension candidates. Maximal degree in co-relation 5343. Up to 2110 conditions per place. [2022-12-13 14:17:20,213 INFO L137 encePairwiseOnDemand]: 383/386 looper letters, 63 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2022-12-13 14:17:20,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 349 flow [2022-12-13 14:17:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:17:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:17:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2022-12-13 14:17:20,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5172711571675302 [2022-12-13 14:17:20,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2022-12-13 14:17:20,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2022-12-13 14:17:20,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:20,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2022-12-13 14:17:20,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:20,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:20,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:20,218 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 146 flow. Second operand 3 states and 599 transitions. [2022-12-13 14:17:20,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 349 flow [2022-12-13 14:17:20,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 68 transitions, 339 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:17:20,220 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 169 flow [2022-12-13 14:17:20,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2022-12-13 14:17:20,220 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2022-12-13 14:17:20,220 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 169 flow [2022-12-13 14:17:20,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:20,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:20,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:20,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-13 14:17:20,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:20,422 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:20,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1466656301, now seen corresponding path program 1 times [2022-12-13 14:17:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:20,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302319288] [2022-12-13 14:17:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:20,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:20,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:20,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:20,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 14:17:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:20,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 14:17:20,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:20,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:20,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302319288] [2022-12-13 14:17:20,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302319288] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:20,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:20,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:17:20,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483503199] [2022-12-13 14:17:20,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:20,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:17:20,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:17:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:17:20,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 386 [2022-12-13 14:17:20,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:20,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:20,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 386 [2022-12-13 14:17:20,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:20,760 INFO L130 PetriNetUnfolder]: 1462/2397 cut-off events. [2022-12-13 14:17:20,760 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-12-13 14:17:20,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5852 conditions, 2397 events. 1462/2397 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12110 event pairs, 661 based on Foata normal form. 12/2085 useless extension candidates. Maximal degree in co-relation 5843. Up to 2091 conditions per place. [2022-12-13 14:17:20,765 INFO L137 encePairwiseOnDemand]: 383/386 looper letters, 71 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2022-12-13 14:17:20,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 383 flow [2022-12-13 14:17:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:17:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:17:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2022-12-13 14:17:20,767 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5233160621761658 [2022-12-13 14:17:20,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2022-12-13 14:17:20,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2022-12-13 14:17:20,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:20,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2022-12-13 14:17:20,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:20,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:20,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:20,769 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 169 flow. Second operand 3 states and 606 transitions. [2022-12-13 14:17:20,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 383 flow [2022-12-13 14:17:20,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:17:20,773 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 170 flow [2022-12-13 14:17:20,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2022-12-13 14:17:20,773 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2022-12-13 14:17:20,773 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 170 flow [2022-12-13 14:17:20,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:20,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:20,773 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:20,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 14:17:20,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:20,974 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash -436847075, now seen corresponding path program 1 times [2022-12-13 14:17:20,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:20,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280710410] [2022-12-13 14:17:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:20,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:20,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:20,980 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:20,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 14:17:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:21,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 14:17:21,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:21,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:17:21,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:17:21,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:17:21,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-13 14:17:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:21,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:17:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:21,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280710410] [2022-12-13 14:17:21,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280710410] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:17:21,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:17:21,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 14:17:21,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558045949] [2022-12-13 14:17:21,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:17:21,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 14:17:21,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 14:17:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:17:23,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 386 [2022-12-13 14:17:23,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 170 flow. Second operand has 10 states, 10 states have (on average 174.8) internal successors, (1748), 10 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:23,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:23,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 386 [2022-12-13 14:17:23,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:26,238 INFO L130 PetriNetUnfolder]: 3420/5629 cut-off events. [2022-12-13 14:17:26,238 INFO L131 PetriNetUnfolder]: For 1883/1883 co-relation queries the response was YES. [2022-12-13 14:17:26,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14063 conditions, 5629 events. 3420/5629 cut-off events. For 1883/1883 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 30945 event pairs, 663 based on Foata normal form. 112/4973 useless extension candidates. Maximal degree in co-relation 14053. Up to 2260 conditions per place. [2022-12-13 14:17:26,252 INFO L137 encePairwiseOnDemand]: 378/386 looper letters, 197 selfloop transitions, 17 changer transitions 0/214 dead transitions. [2022-12-13 14:17:26,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 214 transitions, 1086 flow [2022-12-13 14:17:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 14:17:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 14:17:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2090 transitions. [2022-12-13 14:17:26,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49222797927461137 [2022-12-13 14:17:26,255 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2090 transitions. [2022-12-13 14:17:26,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2090 transitions. [2022-12-13 14:17:26,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:26,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2090 transitions. [2022-12-13 14:17:26,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.0) internal successors, (2090), 11 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:26,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 386.0) internal successors, (4632), 12 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:26,262 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 386.0) internal successors, (4632), 12 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:26,262 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 170 flow. Second operand 11 states and 2090 transitions. [2022-12-13 14:17:26,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 214 transitions, 1086 flow [2022-12-13 14:17:26,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 214 transitions, 1083 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:17:26,267 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 308 flow [2022-12-13 14:17:26,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=308, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2022-12-13 14:17:26,268 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2022-12-13 14:17:26,268 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 308 flow [2022-12-13 14:17:26,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 174.8) internal successors, (1748), 10 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:26,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:26,268 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:26,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 14:17:26,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:26,469 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1323270789, now seen corresponding path program 1 times [2022-12-13 14:17:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:26,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357172195] [2022-12-13 14:17:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:26,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:26,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:26,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:26,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 14:17:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:26,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 14:17:26,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:26,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-13 14:17:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:26,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:26,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:26,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357172195] [2022-12-13 14:17:26,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357172195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:26,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:26,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:17:26,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717327354] [2022-12-13 14:17:26,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:26,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:17:26,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:17:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:17:26,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 386 [2022-12-13 14:17:26,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:26,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:26,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 386 [2022-12-13 14:17:26,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:26,829 INFO L130 PetriNetUnfolder]: 964/1799 cut-off events. [2022-12-13 14:17:26,829 INFO L131 PetriNetUnfolder]: For 1433/1433 co-relation queries the response was YES. [2022-12-13 14:17:26,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4800 conditions, 1799 events. 964/1799 cut-off events. For 1433/1433 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8892 event pairs, 157 based on Foata normal form. 76/1751 useless extension candidates. Maximal degree in co-relation 4784. Up to 1441 conditions per place. [2022-12-13 14:17:26,834 INFO L137 encePairwiseOnDemand]: 381/386 looper letters, 56 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2022-12-13 14:17:26,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 413 flow [2022-12-13 14:17:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:17:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:17:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-12-13 14:17:26,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5034542314335061 [2022-12-13 14:17:26,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-12-13 14:17:26,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-12-13 14:17:26,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:26,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-12-13 14:17:26,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:26,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:26,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:26,838 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 308 flow. Second operand 3 states and 583 transitions. [2022-12-13 14:17:26,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 413 flow [2022-12-13 14:17:26,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 395 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-13 14:17:26,841 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 259 flow [2022-12-13 14:17:26,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2022-12-13 14:17:26,842 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 12 predicate places. [2022-12-13 14:17:26,842 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 259 flow [2022-12-13 14:17:26,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:26,842 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:26,842 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:26,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 14:17:27,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:27,043 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:27,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:27,043 INFO L85 PathProgramCache]: Analyzing trace with hash -804007842, now seen corresponding path program 1 times [2022-12-13 14:17:27,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:27,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957206199] [2022-12-13 14:17:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:27,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:27,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:27,045 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:27,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 14:17:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:27,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:17:27,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:27,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:27,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:27,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957206199] [2022-12-13 14:17:27,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957206199] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:27,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:27,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 14:17:27,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695161862] [2022-12-13 14:17:27,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:27,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 14:17:27,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:27,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 14:17:27,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:17:28,808 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 386 [2022-12-13 14:17:28,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 259 flow. Second operand has 11 states, 11 states have (on average 167.8181818181818) internal successors, (1846), 11 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:28,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:28,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 386 [2022-12-13 14:17:28,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:30,114 INFO L130 PetriNetUnfolder]: 1344/2529 cut-off events. [2022-12-13 14:17:30,114 INFO L131 PetriNetUnfolder]: For 1197/1197 co-relation queries the response was YES. [2022-12-13 14:17:30,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6806 conditions, 2529 events. 1344/2529 cut-off events. For 1197/1197 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 12848 event pairs, 333 based on Foata normal form. 44/2507 useless extension candidates. Maximal degree in co-relation 6791. Up to 1360 conditions per place. [2022-12-13 14:17:30,120 INFO L137 encePairwiseOnDemand]: 372/386 looper letters, 143 selfloop transitions, 18 changer transitions 0/161 dead transitions. [2022-12-13 14:17:30,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 161 transitions, 923 flow [2022-12-13 14:17:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:17:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 14:17:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2309 transitions. [2022-12-13 14:17:30,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46014348345954564 [2022-12-13 14:17:30,124 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2309 transitions. [2022-12-13 14:17:30,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2309 transitions. [2022-12-13 14:17:30,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:30,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2309 transitions. [2022-12-13 14:17:30,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 177.6153846153846) internal successors, (2309), 13 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:30,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 386.0) internal successors, (5404), 14 states have internal predecessors, (5404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:30,137 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 386.0) internal successors, (5404), 14 states have internal predecessors, (5404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:30,137 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 259 flow. Second operand 13 states and 2309 transitions. [2022-12-13 14:17:30,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 161 transitions, 923 flow [2022-12-13 14:17:30,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 161 transitions, 903 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:17:30,141 INFO L231 Difference]: Finished difference. Result has 81 places, 67 transitions, 407 flow [2022-12-13 14:17:30,141 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=407, PETRI_PLACES=81, PETRI_TRANSITIONS=67} [2022-12-13 14:17:30,141 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2022-12-13 14:17:30,141 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 67 transitions, 407 flow [2022-12-13 14:17:30,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 167.8181818181818) internal successors, (1846), 11 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:30,142 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:30,142 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:30,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 14:17:30,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:30,343 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:30,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:30,343 INFO L85 PathProgramCache]: Analyzing trace with hash -435604601, now seen corresponding path program 1 times [2022-12-13 14:17:30,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:30,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535238622] [2022-12-13 14:17:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:30,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:30,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:30,346 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:30,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 14:17:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:30,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:17:30,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:30,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:30,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:30,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535238622] [2022-12-13 14:17:30,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535238622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:30,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:30,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:17:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145799392] [2022-12-13 14:17:30,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:30,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:17:30,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:17:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:17:30,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 386 [2022-12-13 14:17:30,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 67 transitions, 407 flow. Second operand has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:30,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:30,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 386 [2022-12-13 14:17:30,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:31,081 INFO L130 PetriNetUnfolder]: 1474/2767 cut-off events. [2022-12-13 14:17:31,081 INFO L131 PetriNetUnfolder]: For 2545/2545 co-relation queries the response was YES. [2022-12-13 14:17:31,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8237 conditions, 2767 events. 1474/2767 cut-off events. For 2545/2545 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 14539 event pairs, 313 based on Foata normal form. 0/2737 useless extension candidates. Maximal degree in co-relation 8212. Up to 1618 conditions per place. [2022-12-13 14:17:31,091 INFO L137 encePairwiseOnDemand]: 381/386 looper letters, 94 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2022-12-13 14:17:31,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 100 transitions, 758 flow [2022-12-13 14:17:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:17:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:17:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1113 transitions. [2022-12-13 14:17:31,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4805699481865285 [2022-12-13 14:17:31,094 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1113 transitions. [2022-12-13 14:17:31,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1113 transitions. [2022-12-13 14:17:31,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:31,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1113 transitions. [2022-12-13 14:17:31,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.5) internal successors, (1113), 6 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:31,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 386.0) internal successors, (2702), 7 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:31,099 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 386.0) internal successors, (2702), 7 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:31,099 INFO L175 Difference]: Start difference. First operand has 81 places, 67 transitions, 407 flow. Second operand 6 states and 1113 transitions. [2022-12-13 14:17:31,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 100 transitions, 758 flow [2022-12-13 14:17:31,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 100 transitions, 740 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 14:17:31,107 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 413 flow [2022-12-13 14:17:31,107 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2022-12-13 14:17:31,108 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2022-12-13 14:17:31,108 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 413 flow [2022-12-13 14:17:31,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:31,108 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:31,108 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:31,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-12-13 14:17:31,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:31,309 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1999702884, now seen corresponding path program 1 times [2022-12-13 14:17:31,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:31,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960248357] [2022-12-13 14:17:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:31,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:31,316 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:31,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 14:17:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:31,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 14:17:31,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:17:31,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:31,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:31,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960248357] [2022-12-13 14:17:31,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960248357] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:31,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:31,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:17:31,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663321111] [2022-12-13 14:17:31,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:31,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:17:31,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:17:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:17:31,437 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 386 [2022-12-13 14:17:31,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 413 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:31,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:31,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 386 [2022-12-13 14:17:31,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:31,876 INFO L130 PetriNetUnfolder]: 1745/3298 cut-off events. [2022-12-13 14:17:31,876 INFO L131 PetriNetUnfolder]: For 3265/3265 co-relation queries the response was YES. [2022-12-13 14:17:31,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9851 conditions, 3298 events. 1745/3298 cut-off events. For 3265/3265 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 18777 event pairs, 1202 based on Foata normal form. 84/3328 useless extension candidates. Maximal degree in co-relation 9824. Up to 2730 conditions per place. [2022-12-13 14:17:31,893 INFO L137 encePairwiseOnDemand]: 382/386 looper letters, 111 selfloop transitions, 3 changer transitions 0/114 dead transitions. [2022-12-13 14:17:31,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 114 transitions, 913 flow [2022-12-13 14:17:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:17:31,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:17:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2022-12-13 14:17:31,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5241796200345423 [2022-12-13 14:17:31,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2022-12-13 14:17:31,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2022-12-13 14:17:31,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:31,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2022-12-13 14:17:31,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:31,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:31,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:31,897 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 413 flow. Second operand 3 states and 607 transitions. [2022-12-13 14:17:31,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 114 transitions, 913 flow [2022-12-13 14:17:31,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 909 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:17:31,905 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 431 flow [2022-12-13 14:17:31,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=431, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2022-12-13 14:17:31,905 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2022-12-13 14:17:31,905 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 431 flow [2022-12-13 14:17:31,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:31,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:31,905 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:31,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 14:17:32,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:32,107 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash 442482294, now seen corresponding path program 1 times [2022-12-13 14:17:32,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:32,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681078507] [2022-12-13 14:17:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:32,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:32,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:32,112 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:32,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 14:17:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:32,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 14:17:32,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:32,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:17:32,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 14:17:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:32,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:32,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:32,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681078507] [2022-12-13 14:17:32,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681078507] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:32,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:32,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 14:17:32,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917323553] [2022-12-13 14:17:32,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:32,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:17:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:17:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:17:33,946 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 386 [2022-12-13 14:17:33,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 431 flow. Second operand has 14 states, 14 states have (on average 156.57142857142858) internal successors, (2192), 14 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:33,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:33,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 386 [2022-12-13 14:17:33,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:35,884 INFO L130 PetriNetUnfolder]: 2244/4254 cut-off events. [2022-12-13 14:17:35,884 INFO L131 PetriNetUnfolder]: For 4258/4258 co-relation queries the response was YES. [2022-12-13 14:17:35,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13423 conditions, 4254 events. 2244/4254 cut-off events. For 4258/4258 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25243 event pairs, 722 based on Foata normal form. 12/4266 useless extension candidates. Maximal degree in co-relation 13395. Up to 3013 conditions per place. [2022-12-13 14:17:35,905 INFO L137 encePairwiseOnDemand]: 371/386 looper letters, 169 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2022-12-13 14:17:35,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 204 transitions, 1409 flow [2022-12-13 14:17:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 14:17:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 14:17:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3422 transitions. [2022-12-13 14:17:35,921 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4221564273377745 [2022-12-13 14:17:35,921 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3422 transitions. [2022-12-13 14:17:35,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3422 transitions. [2022-12-13 14:17:35,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:35,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3422 transitions. [2022-12-13 14:17:35,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 162.95238095238096) internal successors, (3422), 21 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:35,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 386.0) internal successors, (8492), 22 states have internal predecessors, (8492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:35,938 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 386.0) internal successors, (8492), 22 states have internal predecessors, (8492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:35,938 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 431 flow. Second operand 21 states and 3422 transitions. [2022-12-13 14:17:35,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 204 transitions, 1409 flow [2022-12-13 14:17:35,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 204 transitions, 1396 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:17:35,949 INFO L231 Difference]: Finished difference. Result has 116 places, 100 transitions, 752 flow [2022-12-13 14:17:35,949 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=752, PETRI_PLACES=116, PETRI_TRANSITIONS=100} [2022-12-13 14:17:35,949 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 67 predicate places. [2022-12-13 14:17:35,950 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 100 transitions, 752 flow [2022-12-13 14:17:35,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.57142857142858) internal successors, (2192), 14 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:35,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:35,950 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:35,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 14:17:36,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:36,152 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:36,153 INFO L85 PathProgramCache]: Analyzing trace with hash -779039504, now seen corresponding path program 2 times [2022-12-13 14:17:36,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:36,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304700998] [2022-12-13 14:17:36,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:17:36,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:36,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:36,157 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:36,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 14:17:36,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:17:36,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:17:36,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 14:17:36,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:36,316 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-13 14:17:36,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-12-13 14:17:36,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:17:36,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 14:17:36,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 14:17:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:36,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:36,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:36,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304700998] [2022-12-13 14:17:36,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304700998] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:36,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:36,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 14:17:36,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207548677] [2022-12-13 14:17:36,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:36,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 14:17:36,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:36,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 14:17:36,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:17:38,417 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 386 [2022-12-13 14:17:38,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 100 transitions, 752 flow. Second operand has 15 states, 15 states have (on average 153.46666666666667) internal successors, (2302), 15 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:38,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:38,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 386 [2022-12-13 14:17:38,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:40,075 INFO L130 PetriNetUnfolder]: 2767/5248 cut-off events. [2022-12-13 14:17:40,076 INFO L131 PetriNetUnfolder]: For 7027/7027 co-relation queries the response was YES. [2022-12-13 14:17:40,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17859 conditions, 5248 events. 2767/5248 cut-off events. For 7027/7027 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 31523 event pairs, 987 based on Foata normal form. 6/5254 useless extension candidates. Maximal degree in co-relation 17818. Up to 3715 conditions per place. [2022-12-13 14:17:40,104 INFO L137 encePairwiseOnDemand]: 371/386 looper letters, 164 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2022-12-13 14:17:40,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 195 transitions, 1586 flow [2022-12-13 14:17:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:17:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 14:17:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2108 transitions. [2022-12-13 14:17:40,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.420087684336389 [2022-12-13 14:17:40,108 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2108 transitions. [2022-12-13 14:17:40,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2108 transitions. [2022-12-13 14:17:40,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:40,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2108 transitions. [2022-12-13 14:17:40,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 162.15384615384616) internal successors, (2108), 13 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:40,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 386.0) internal successors, (5404), 14 states have internal predecessors, (5404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:40,114 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 386.0) internal successors, (5404), 14 states have internal predecessors, (5404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:40,114 INFO L175 Difference]: Start difference. First operand has 116 places, 100 transitions, 752 flow. Second operand 13 states and 2108 transitions. [2022-12-13 14:17:40,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 195 transitions, 1586 flow [2022-12-13 14:17:40,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 195 transitions, 1563 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 14:17:40,137 INFO L231 Difference]: Finished difference. Result has 131 places, 113 transitions, 956 flow [2022-12-13 14:17:40,137 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=956, PETRI_PLACES=131, PETRI_TRANSITIONS=113} [2022-12-13 14:17:40,137 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 82 predicate places. [2022-12-13 14:17:40,137 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 113 transitions, 956 flow [2022-12-13 14:17:40,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 153.46666666666667) internal successors, (2302), 15 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:40,138 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:40,138 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:40,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 14:17:40,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:40,338 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash 221064678, now seen corresponding path program 3 times [2022-12-13 14:17:40,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:40,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344826081] [2022-12-13 14:17:40,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:17:40,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:40,341 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:40,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 14:17:40,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 14:17:40,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:17:40,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 14:17:40,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:40,503 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-13 14:17:40,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-12-13 14:17:40,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:17:40,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 14:17:40,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 14:17:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:40,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:17:40,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:40,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344826081] [2022-12-13 14:17:40,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344826081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:17:40,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:17:40,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 14:17:40,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678765099] [2022-12-13 14:17:40,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:17:40,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 14:17:40,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:40,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 14:17:40,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:17:42,882 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 386 [2022-12-13 14:17:42,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 113 transitions, 956 flow. Second operand has 15 states, 15 states have (on average 153.46666666666667) internal successors, (2302), 15 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:42,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:42,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 386 [2022-12-13 14:17:42,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:44,992 INFO L130 PetriNetUnfolder]: 2755/5224 cut-off events. [2022-12-13 14:17:44,992 INFO L131 PetriNetUnfolder]: For 7955/7955 co-relation queries the response was YES. [2022-12-13 14:17:45,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18350 conditions, 5224 events. 2755/5224 cut-off events. For 7955/7955 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 31115 event pairs, 641 based on Foata normal form. 12/5236 useless extension candidates. Maximal degree in co-relation 18303. Up to 2067 conditions per place. [2022-12-13 14:17:45,011 INFO L137 encePairwiseOnDemand]: 371/386 looper letters, 154 selfloop transitions, 63 changer transitions 0/217 dead transitions. [2022-12-13 14:17:45,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 217 transitions, 1825 flow [2022-12-13 14:17:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:17:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 14:17:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3196 transitions. [2022-12-13 14:17:45,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4139896373056995 [2022-12-13 14:17:45,014 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3196 transitions. [2022-12-13 14:17:45,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3196 transitions. [2022-12-13 14:17:45,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:45,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3196 transitions. [2022-12-13 14:17:45,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 159.8) internal successors, (3196), 20 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:45,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 386.0) internal successors, (8106), 21 states have internal predecessors, (8106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:45,022 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 386.0) internal successors, (8106), 21 states have internal predecessors, (8106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:45,022 INFO L175 Difference]: Start difference. First operand has 131 places, 113 transitions, 956 flow. Second operand 20 states and 3196 transitions. [2022-12-13 14:17:45,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 217 transitions, 1825 flow [2022-12-13 14:17:45,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 217 transitions, 1792 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-12-13 14:17:45,046 INFO L231 Difference]: Finished difference. Result has 149 places, 123 transitions, 1181 flow [2022-12-13 14:17:45,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1181, PETRI_PLACES=149, PETRI_TRANSITIONS=123} [2022-12-13 14:17:45,046 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 100 predicate places. [2022-12-13 14:17:45,047 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 123 transitions, 1181 flow [2022-12-13 14:17:45,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 153.46666666666667) internal successors, (2302), 15 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:45,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:45,047 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 14:17:45,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 14:17:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:45,248 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1730636683, now seen corresponding path program 1 times [2022-12-13 14:17:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:45,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205983036] [2022-12-13 14:17:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:45,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:45,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:45,250 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:45,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 14:17:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:17:45,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:45,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:17:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:45,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:45,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205983036] [2022-12-13 14:17:45,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205983036] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:17:45,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:17:45,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-12-13 14:17:45,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543834918] [2022-12-13 14:17:45,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:17:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 14:17:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 14:17:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:17:45,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 386 [2022-12-13 14:17:45,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 123 transitions, 1181 flow. Second operand has 12 states, 12 states have (on average 179.58333333333334) internal successors, (2155), 12 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:45,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:45,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 386 [2022-12-13 14:17:45,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:47,106 INFO L130 PetriNetUnfolder]: 4089/7728 cut-off events. [2022-12-13 14:17:47,106 INFO L131 PetriNetUnfolder]: For 14931/14931 co-relation queries the response was YES. [2022-12-13 14:17:47,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28095 conditions, 7728 events. 4089/7728 cut-off events. For 14931/14931 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 47305 event pairs, 1323 based on Foata normal form. 98/7826 useless extension candidates. Maximal degree in co-relation 28043. Up to 1719 conditions per place. [2022-12-13 14:17:47,149 INFO L137 encePairwiseOnDemand]: 379/386 looper letters, 299 selfloop transitions, 47 changer transitions 0/346 dead transitions. [2022-12-13 14:17:47,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 346 transitions, 3188 flow [2022-12-13 14:17:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 14:17:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 14:17:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2690 transitions. [2022-12-13 14:17:47,152 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49777942264988895 [2022-12-13 14:17:47,152 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2690 transitions. [2022-12-13 14:17:47,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2690 transitions. [2022-12-13 14:17:47,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:47,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2690 transitions. [2022-12-13 14:17:47,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 192.14285714285714) internal successors, (2690), 14 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:47,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 386.0) internal successors, (5790), 15 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:47,158 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 386.0) internal successors, (5790), 15 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:47,158 INFO L175 Difference]: Start difference. First operand has 149 places, 123 transitions, 1181 flow. Second operand 14 states and 2690 transitions. [2022-12-13 14:17:47,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 346 transitions, 3188 flow [2022-12-13 14:17:47,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 346 transitions, 3003 flow, removed 40 selfloop flow, removed 12 redundant places. [2022-12-13 14:17:47,196 INFO L231 Difference]: Finished difference. Result has 157 places, 149 transitions, 1492 flow [2022-12-13 14:17:47,196 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1492, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2022-12-13 14:17:47,196 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 108 predicate places. [2022-12-13 14:17:47,196 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 1492 flow [2022-12-13 14:17:47,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.58333333333334) internal successors, (2155), 12 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:47,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:47,197 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:47,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 14:17:47,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:47,398 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:47,399 INFO L85 PathProgramCache]: Analyzing trace with hash 223848103, now seen corresponding path program 1 times [2022-12-13 14:17:47,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:47,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056121102] [2022-12-13 14:17:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:47,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:47,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:47,404 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:47,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 14:17:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:47,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:17:47,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:47,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:17:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:47,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:17:47,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056121102] [2022-12-13 14:17:47,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056121102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:17:47,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:17:47,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-13 14:17:47,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113124559] [2022-12-13 14:17:47,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:17:47,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:17:47,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:17:47,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:17:47,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:17:47,561 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 386 [2022-12-13 14:17:47,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 1492 flow. Second operand has 6 states, 6 states have (on average 184.66666666666666) internal successors, (1108), 6 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:47,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:47,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 386 [2022-12-13 14:17:47,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:49,999 INFO L130 PetriNetUnfolder]: 7513/14720 cut-off events. [2022-12-13 14:17:49,999 INFO L131 PetriNetUnfolder]: For 33351/33351 co-relation queries the response was YES. [2022-12-13 14:17:50,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53927 conditions, 14720 events. 7513/14720 cut-off events. For 33351/33351 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 108071 event pairs, 2629 based on Foata normal form. 2162/16882 useless extension candidates. Maximal degree in co-relation 53869. Up to 4386 conditions per place. [2022-12-13 14:17:50,093 INFO L137 encePairwiseOnDemand]: 381/386 looper letters, 483 selfloop transitions, 22 changer transitions 0/505 dead transitions. [2022-12-13 14:17:50,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 505 transitions, 6060 flow [2022-12-13 14:17:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:17:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:17:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1218 transitions. [2022-12-13 14:17:50,096 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5259067357512953 [2022-12-13 14:17:50,096 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1218 transitions. [2022-12-13 14:17:50,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1218 transitions. [2022-12-13 14:17:50,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:50,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1218 transitions. [2022-12-13 14:17:50,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:50,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 386.0) internal successors, (2702), 7 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:50,101 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 386.0) internal successors, (2702), 7 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:50,101 INFO L175 Difference]: Start difference. First operand has 157 places, 149 transitions, 1492 flow. Second operand 6 states and 1218 transitions. [2022-12-13 14:17:50,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 505 transitions, 6060 flow [2022-12-13 14:17:50,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 505 transitions, 5780 flow, removed 140 selfloop flow, removed 0 redundant places. [2022-12-13 14:17:50,217 INFO L231 Difference]: Finished difference. Result has 166 places, 160 transitions, 1633 flow [2022-12-13 14:17:50,217 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1633, PETRI_PLACES=166, PETRI_TRANSITIONS=160} [2022-12-13 14:17:50,218 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 117 predicate places. [2022-12-13 14:17:50,218 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 160 transitions, 1633 flow [2022-12-13 14:17:50,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 184.66666666666666) internal successors, (1108), 6 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:50,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:50,218 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:50,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 14:17:50,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:50,419 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 14:17:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:50,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1373843167, now seen corresponding path program 1 times [2022-12-13 14:17:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:17:50,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963406373] [2022-12-13 14:17:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:50,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:50,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:17:50,427 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:17:50,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 14:17:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:17:50,559 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:17:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:17:50,660 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-12-13 14:17:50,660 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:17:50,661 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-12-13 14:17:50,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-12-13 14:17:50,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-12-13 14:17:50,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-12-13 14:17:50,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-12-13 14:17:50,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-12-13 14:17:50,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-12-13 14:17:50,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-12-13 14:17:50,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-12-13 14:17:50,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2022-12-13 14:17:50,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2022-12-13 14:17:50,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2022-12-13 14:17:50,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-12-13 14:17:50,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-12-13 14:17:50,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2022-12-13 14:17:50,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2022-12-13 14:17:50,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-12-13 14:17:50,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-12-13 14:17:50,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-12-13 14:17:50,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-12-13 14:17:50,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2022-12-13 14:17:50,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-12-13 14:17:50,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-12-13 14:17:50,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-12-13 14:17:50,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:17:50,867 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:50,881 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 14:17:50,881 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 14:17:50,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 02:17:50 BasicIcfg [2022-12-13 14:17:50,922 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 14:17:50,922 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 14:17:50,922 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 14:17:50,922 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 14:17:50,923 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:17:00" (3/4) ... [2022-12-13 14:17:50,925 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 14:17:50,925 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 14:17:50,926 INFO L158 Benchmark]: Toolchain (without parser) took 51623.21ms. Allocated memory was 75.5MB in the beginning and 1.0GB in the end (delta: 943.7MB). Free memory was 51.0MB in the beginning and 475.2MB in the end (delta: -424.3MB). Peak memory consumption was 519.6MB. Max. memory is 16.1GB. [2022-12-13 14:17:50,926 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory is still 35.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:17:50,926 INFO L158 Benchmark]: CACSL2BoogieTranslator took 570.09ms. Allocated memory is still 75.5MB. Free memory was 50.8MB in the beginning and 37.2MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-13 14:17:50,926 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.25ms. Allocated memory is still 75.5MB. Free memory was 37.2MB in the beginning and 34.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:17:50,927 INFO L158 Benchmark]: Boogie Preprocessor took 21.97ms. Allocated memory is still 75.5MB. Free memory was 34.3MB in the beginning and 32.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:17:50,927 INFO L158 Benchmark]: RCFGBuilder took 486.52ms. Allocated memory is still 75.5MB. Free memory was 32.3MB in the beginning and 34.6MB in the end (delta: -2.2MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2022-12-13 14:17:50,927 INFO L158 Benchmark]: TraceAbstraction took 50500.63ms. Allocated memory was 75.5MB in the beginning and 1.0GB in the end (delta: 943.7MB). Free memory was 33.7MB in the beginning and 476.3MB in the end (delta: -442.6MB). Peak memory consumption was 499.9MB. Max. memory is 16.1GB. [2022-12-13 14:17:50,927 INFO L158 Benchmark]: Witness Printer took 3.15ms. Allocated memory is still 1.0GB. Free memory was 476.3MB in the beginning and 475.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:17:50,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory is still 35.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 570.09ms. Allocated memory is still 75.5MB. Free memory was 50.8MB in the beginning and 37.2MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.25ms. Allocated memory is still 75.5MB. Free memory was 37.2MB in the beginning and 34.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.97ms. Allocated memory is still 75.5MB. Free memory was 34.3MB in the beginning and 32.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 486.52ms. Allocated memory is still 75.5MB. Free memory was 32.3MB in the beginning and 34.6MB in the end (delta: -2.2MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. * TraceAbstraction took 50500.63ms. Allocated memory was 75.5MB in the beginning and 1.0GB in the end (delta: 943.7MB). Free memory was 33.7MB in the beginning and 476.3MB in the end (delta: -442.6MB). Peak memory consumption was 499.9MB. Max. memory is 16.1GB. * Witness Printer took 3.15ms. Allocated memory is still 1.0GB. Free memory was 476.3MB in the beginning and 475.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 12.1s, 185 PlacesBefore, 49 PlacesAfterwards, 188 TransitionsBefore, 47 TransitionsAfterwards, 10398 CoEnabledTransitionPairs, 7 FixpointIterations, 47 TrivialSequentialCompositions, 118 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 5 ChoiceCompositions, 191 TotalNumberOfCompositions, 16613 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12834, independent: 12574, independent conditional: 0, independent unconditional: 12574, dependent: 260, dependent conditional: 0, dependent unconditional: 260, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6141, independent: 6077, independent conditional: 0, independent unconditional: 6077, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 12834, independent: 6497, independent conditional: 0, independent unconditional: 6497, dependent: 196, dependent conditional: 0, dependent unconditional: 196, unknown: 6141, unknown conditional: 0, unknown unconditional: 6141] , Statistics on independence cache: Total cache size (in pairs): 317, Positive cache size: 297, Positive conditional cache size: 0, Positive unconditional cache size: 297, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={7:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=0, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={7:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=1, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 303 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 50.3s, OverallIterations: 22, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 28.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 12.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4839 SdHoareTripleChecker+Valid, 18.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4003 mSDsluCounter, 4347 SdHoareTripleChecker+Invalid, 15.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4270 mSDsCounter, 178 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17091 IncrementalHoareTripleChecker+Invalid, 17269 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 178 mSolverCounterUnsat, 77 mSDtfsCounter, 17091 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 376 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1633occurred in iteration=21, InterpolantAutomatonStates: 144, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 299 NumberOfCodeBlocks, 299 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 309 ConstructedInterpolants, 10 QuantifiedInterpolants, 2548 SizeOfPredicates, 111 NumberOfNonLiveVariables, 2158 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 7/39 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 14:17:50,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db61750f-aa2b-4729-b91b-ece5c4e89b65/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample