./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --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_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/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_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/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_75d11422-96a0-4491-a417-008ff36c6b8f/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 b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:29:38,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:29:38,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:29:38,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:29:38,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:29:38,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:29:38,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:29:38,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:29:38,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:29:38,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:29:38,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:29:38,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:29:38,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:29:38,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:29:38,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:29:38,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:29:38,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:29:38,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:29:38,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:29:38,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:29:38,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:29:38,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:29:38,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:29:38,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:29:38,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:29:38,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:29:38,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:29:38,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:29:38,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:29:38,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:29:38,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:29:38,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:29:38,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:29:38,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:29:38,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:29:38,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:29:38,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:29:38,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:29:38,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:29:38,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:29:38,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:29:38,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:29:38,247 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:29:38,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:29:38,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:29:38,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:29:38,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:29:38,248 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:29:38,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:29:38,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:29:38,249 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:29:38,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:29:38,249 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:29:38,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:29:38,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:29:38,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:29:38,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:29:38,249 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:29:38,249 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:29:38,249 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:29:38,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:29:38,250 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:29:38,250 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:29:38,250 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:29:38,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:29:38,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:29:38,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:29:38,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:29:38,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:29:38,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:29:38,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:29:38,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:29:38,251 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:29:38,251 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:29:38,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:29:38,251 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:29:38,251 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_75d11422-96a0-4491-a417-008ff36c6b8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d [2022-12-13 17:29:38,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:29:38,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:29:38,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:29:38,439 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:29:38,439 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:29:38,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2022-12-13 17:29:40,971 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:29:41,131 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:29:41,131 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2022-12-13 17:29:41,136 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/data/284711492/42936c93e3914f1a86b706c57143b4ef/FLAG9227d18e4 [2022-12-13 17:29:41,151 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/data/284711492/42936c93e3914f1a86b706c57143b4ef [2022-12-13 17:29:41,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:29:41,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:29:41,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:29:41,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:29:41,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:29:41,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263d1aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41, skipping insertion in model container [2022-12-13 17:29:41,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:29:41,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:29:41,313 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_75d11422-96a0-4491-a417-008ff36c6b8f/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2022-12-13 17:29:41,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:29:41,328 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:29:41,351 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_75d11422-96a0-4491-a417-008ff36c6b8f/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2022-12-13 17:29:41,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:29:41,364 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:29:41,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41 WrapperNode [2022-12-13 17:29:41,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:29:41,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:29:41,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:29:41,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:29:41,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,402 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 388 [2022-12-13 17:29:41,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:29:41,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:29:41,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:29:41,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:29:41,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,436 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:29:41,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:29:41,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:29:41,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:29:41,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (1/1) ... [2022-12-13 17:29:41,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:29:41,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:41,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:29:41,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:29:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:29:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:29:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:29:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:29:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 17:29:41,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 17:29:41,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 17:29:41,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 17:29:41,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:29:41,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 17:29:41,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:29:41,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:29:41,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:29:41,510 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 17:29:41,614 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:29:41,616 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:29:42,110 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:29:42,131 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:29:42,131 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 17:29:42,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:29:42 BoogieIcfgContainer [2022-12-13 17:29:42,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:29:42,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:29:42,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:29:42,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:29:42,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:29:41" (1/3) ... [2022-12-13 17:29:42,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab3b76d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:29:42, skipping insertion in model container [2022-12-13 17:29:42,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:29:41" (2/3) ... [2022-12-13 17:29:42,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab3b76d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:29:42, skipping insertion in model container [2022-12-13 17:29:42,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:29:42" (3/3) ... [2022-12-13 17:29:42,140 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2022-12-13 17:29:42,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:29:42,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2022-12-13 17:29:42,164 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:29:42,270 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 17:29:42,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 522 places, 564 transitions, 1144 flow [2022-12-13 17:29:42,447 INFO L130 PetriNetUnfolder]: 49/562 cut-off events. [2022-12-13 17:29:42,447 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:29:42,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 562 events. 49/562 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1861 event pairs, 0 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 389. Up to 2 conditions per place. [2022-12-13 17:29:42,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 522 places, 564 transitions, 1144 flow [2022-12-13 17:29:42,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 515 places, 557 transitions, 1126 flow [2022-12-13 17:29:42,477 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:29:42,488 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 515 places, 557 transitions, 1126 flow [2022-12-13 17:29:42,490 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 515 places, 557 transitions, 1126 flow [2022-12-13 17:29:42,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 515 places, 557 transitions, 1126 flow [2022-12-13 17:29:42,615 INFO L130 PetriNetUnfolder]: 49/557 cut-off events. [2022-12-13 17:29:42,615 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:29:42,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 557 events. 49/557 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1855 event pairs, 0 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 389. Up to 2 conditions per place. [2022-12-13 17:29:42,657 INFO L119 LiptonReduction]: Number of co-enabled transitions 78540 [2022-12-13 17:30:03,587 INFO L134 LiptonReduction]: Checked pairs total: 80633 [2022-12-13 17:30:03,587 INFO L136 LiptonReduction]: Total number of compositions: 738 [2022-12-13 17:30:03,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:30:03,607 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;@84055fc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:30:03,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2022-12-13 17:30:03,610 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 17:30:03,610 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:30:03,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:03,611 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:30:03,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:03,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash 78596, now seen corresponding path program 1 times [2022-12-13 17:30:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:03,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812777905] [2022-12-13 17:30:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:03,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:03,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:03,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812777905] [2022-12-13 17:30:03,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812777905] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:30:03,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:30:03,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:30:03,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081324243] [2022-12-13 17:30:03,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:03,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:30:03,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:03,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:30:03,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:30:04,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 520 out of 1302 [2022-12-13 17:30:04,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 520.6666666666666) internal successors, (1562), 3 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:04,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:04,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 520 of 1302 [2022-12-13 17:30:04,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:05,033 INFO L130 PetriNetUnfolder]: 3813/5825 cut-off events. [2022-12-13 17:30:05,033 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-12-13 17:30:05,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11774 conditions, 5825 events. 3813/5825 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 33339 event pairs, 3010 based on Foata normal form. 0/1695 useless extension candidates. Maximal degree in co-relation 5696. Up to 2915 conditions per place. [2022-12-13 17:30:05,057 INFO L137 encePairwiseOnDemand]: 1283/1302 looper letters, 119 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2022-12-13 17:30:05,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 123 transitions, 516 flow [2022-12-13 17:30:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:30:05,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:30:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1711 transitions. [2022-12-13 17:30:05,072 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43804403481822834 [2022-12-13 17:30:05,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1711 transitions. [2022-12-13 17:30:05,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1711 transitions. [2022-12-13 17:30:05,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:05,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1711 transitions. [2022-12-13 17:30:05,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 570.3333333333334) internal successors, (1711), 3 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:05,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:05,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:05,094 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 164 flow. Second operand 3 states and 1711 transitions. [2022-12-13 17:30:05,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 123 transitions, 516 flow [2022-12-13 17:30:05,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 123 transitions, 500 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 17:30:05,100 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 162 flow [2022-12-13 17:30:05,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2022-12-13 17:30:05,104 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -13 predicate places. [2022-12-13 17:30:05,104 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 162 flow [2022-12-13 17:30:05,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 520.6666666666666) internal successors, (1562), 3 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:05,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:05,105 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:30:05,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:30:05,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:05,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:05,106 INFO L85 PathProgramCache]: Analyzing trace with hash 78595, now seen corresponding path program 1 times [2022-12-13 17:30:05,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:05,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253435224] [2022-12-13 17:30:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:05,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:05,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:05,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253435224] [2022-12-13 17:30:05,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253435224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:30:05,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:30:05,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:30:05,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085162615] [2022-12-13 17:30:05,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:05,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:30:05,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:05,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:30:05,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:30:05,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 524 out of 1302 [2022-12-13 17:30:05,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 524.6666666666666) internal successors, (1574), 3 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:05,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:05,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 524 of 1302 [2022-12-13 17:30:05,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:05,877 INFO L130 PetriNetUnfolder]: 3813/5821 cut-off events. [2022-12-13 17:30:05,877 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 17:30:05,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11709 conditions, 5821 events. 3813/5821 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 33449 event pairs, 3010 based on Foata normal form. 2/1701 useless extension candidates. Maximal degree in co-relation 5843. Up to 5821 conditions per place. [2022-12-13 17:30:05,896 INFO L137 encePairwiseOnDemand]: 1299/1302 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-12-13 17:30:05,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 286 flow [2022-12-13 17:30:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:30:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:30:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1635 transitions. [2022-12-13 17:30:05,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4185867895545315 [2022-12-13 17:30:05,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1635 transitions. [2022-12-13 17:30:05,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1635 transitions. [2022-12-13 17:30:05,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:05,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1635 transitions. [2022-12-13 17:30:05,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 545.0) internal successors, (1635), 3 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:05,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:05,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:05,908 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 162 flow. Second operand 3 states and 1635 transitions. [2022-12-13 17:30:05,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 286 flow [2022-12-13 17:30:05,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:30:05,910 INFO L231 Difference]: Finished difference. Result has 59 places, 64 transitions, 152 flow [2022-12-13 17:30:05,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=59, PETRI_TRANSITIONS=64} [2022-12-13 17:30:05,910 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -15 predicate places. [2022-12-13 17:30:05,911 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 64 transitions, 152 flow [2022-12-13 17:30:05,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 524.6666666666666) internal successors, (1574), 3 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:05,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:05,911 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:30:05,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:30:05,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2449414, now seen corresponding path program 1 times [2022-12-13 17:30:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:05,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239201266] [2022-12-13 17:30:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:05,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:06,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:06,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239201266] [2022-12-13 17:30:06,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239201266] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867019946] [2022-12-13 17:30:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:06,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:06,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:06,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:06,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:30:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:06,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:30:06,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:06,189 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 17:30:06,190 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 17:30:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:06,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:06,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867019946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:06,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:06,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 17:30:06,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999537320] [2022-12-13 17:30:06,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:06,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:30:06,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:06,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:30:06,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:30:06,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 514 out of 1302 [2022-12-13 17:30:06,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 64 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 515.125) internal successors, (4121), 8 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:06,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:06,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 514 of 1302 [2022-12-13 17:30:06,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:08,193 INFO L130 PetriNetUnfolder]: 5719/8734 cut-off events. [2022-12-13 17:30:08,194 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 17:30:08,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17564 conditions, 8734 events. 5719/8734 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 53269 event pairs, 4515 based on Foata normal form. 2/2551 useless extension candidates. Maximal degree in co-relation 17556. Up to 2913 conditions per place. [2022-12-13 17:30:08,235 INFO L137 encePairwiseOnDemand]: 1293/1302 looper letters, 169 selfloop transitions, 12 changer transitions 0/181 dead transitions. [2022-12-13 17:30:08,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 181 transitions, 770 flow [2022-12-13 17:30:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:30:08,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:30:08,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3279 transitions. [2022-12-13 17:30:08,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4197388632872504 [2022-12-13 17:30:08,242 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3279 transitions. [2022-12-13 17:30:08,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3279 transitions. [2022-12-13 17:30:08,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:08,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3279 transitions. [2022-12-13 17:30:08,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 546.5) internal successors, (3279), 6 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:08,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1302.0) internal successors, (9114), 7 states have internal predecessors, (9114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:08,263 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1302.0) internal successors, (9114), 7 states have internal predecessors, (9114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:08,263 INFO L175 Difference]: Start difference. First operand has 59 places, 64 transitions, 152 flow. Second operand 6 states and 3279 transitions. [2022-12-13 17:30:08,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 181 transitions, 770 flow [2022-12-13 17:30:08,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 181 transitions, 769 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:30:08,266 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 251 flow [2022-12-13 17:30:08,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=251, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2022-12-13 17:30:08,267 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2022-12-13 17:30:08,268 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 251 flow [2022-12-13 17:30:08,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 515.125) internal successors, (4121), 8 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:08,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:08,269 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 17:30:08,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:30:08,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:08,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:08,471 INFO L85 PathProgramCache]: Analyzing trace with hash -31104124, now seen corresponding path program 2 times [2022-12-13 17:30:08,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:08,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576644709] [2022-12-13 17:30:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:08,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:08,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:08,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576644709] [2022-12-13 17:30:08,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576644709] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:08,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594533411] [2022-12-13 17:30:08,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:30:08,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:08,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:08,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:08,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:30:08,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:30:08,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:30:08,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:30:08,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:08,789 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 17:30:08,789 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 17:30:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:08,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:30:08,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594533411] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:30:08,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:30:08,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2022-12-13 17:30:08,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501681752] [2022-12-13 17:30:08,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:08,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:30:08,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:30:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:30:09,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 522 out of 1302 [2022-12-13 17:30:09,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 251 flow. Second operand has 7 states, 7 states have (on average 522.8571428571429) internal successors, (3660), 7 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:09,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:09,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 522 of 1302 [2022-12-13 17:30:09,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:10,409 INFO L130 PetriNetUnfolder]: 5719/8732 cut-off events. [2022-12-13 17:30:10,409 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 17:30:10,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17604 conditions, 8732 events. 5719/8732 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 52961 event pairs, 4515 based on Foata normal form. 2/2554 useless extension candidates. Maximal degree in co-relation 17591. Up to 2910 conditions per place. [2022-12-13 17:30:10,439 INFO L137 encePairwiseOnDemand]: 1296/1302 looper letters, 167 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2022-12-13 17:30:10,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 179 transitions, 841 flow [2022-12-13 17:30:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:30:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:30:10,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3835 transitions. [2022-12-13 17:30:10,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42078121571209126 [2022-12-13 17:30:10,446 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3835 transitions. [2022-12-13 17:30:10,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3835 transitions. [2022-12-13 17:30:10,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:10,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3835 transitions. [2022-12-13 17:30:10,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 547.8571428571429) internal successors, (3835), 7 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:10,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1302.0) internal successors, (10416), 8 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:10,464 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1302.0) internal successors, (10416), 8 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:10,464 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 251 flow. Second operand 7 states and 3835 transitions. [2022-12-13 17:30:10,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 179 transitions, 841 flow [2022-12-13 17:30:10,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 179 transitions, 803 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-12-13 17:30:10,468 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 217 flow [2022-12-13 17:30:10,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2022-12-13 17:30:10,468 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2022-12-13 17:30:10,469 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 217 flow [2022-12-13 17:30:10,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 522.8571428571429) internal successors, (3660), 7 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:10,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:10,470 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2022-12-13 17:30:10,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:30:10,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:10,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash -957989124, now seen corresponding path program 1 times [2022-12-13 17:30:10,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:10,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340520767] [2022-12-13 17:30:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:10,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:30:10,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:10,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340520767] [2022-12-13 17:30:10,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340520767] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:10,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747548550] [2022-12-13 17:30:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:10,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:10,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:10,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:30:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:10,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:30:10,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:30:10,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:30:10,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747548550] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:10,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:10,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 17:30:10,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798812816] [2022-12-13 17:30:10,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:10,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:30:10,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:10,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:30:10,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:30:10,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 522 out of 1302 [2022-12-13 17:30:11,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 217 flow. Second operand has 11 states, 11 states have (on average 523.2727272727273) internal successors, (5756), 11 states have internal predecessors, (5756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:11,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:11,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 522 of 1302 [2022-12-13 17:30:11,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:11,413 INFO L130 PetriNetUnfolder]: 1907/2920 cut-off events. [2022-12-13 17:30:11,413 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 17:30:11,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5906 conditions, 2920 events. 1907/2920 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 15045 event pairs, 1505 based on Foata normal form. 6/866 useless extension candidates. Maximal degree in co-relation 5895. Up to 2911 conditions per place. [2022-12-13 17:30:11,420 INFO L137 encePairwiseOnDemand]: 1295/1302 looper letters, 57 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2022-12-13 17:30:11,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 349 flow [2022-12-13 17:30:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:30:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:30:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3735 transitions. [2022-12-13 17:30:11,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4098090849242923 [2022-12-13 17:30:11,426 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3735 transitions. [2022-12-13 17:30:11,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3735 transitions. [2022-12-13 17:30:11,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:11,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3735 transitions. [2022-12-13 17:30:11,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 533.5714285714286) internal successors, (3735), 7 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:11,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1302.0) internal successors, (10416), 8 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:11,443 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1302.0) internal successors, (10416), 8 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:11,443 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 217 flow. Second operand 7 states and 3735 transitions. [2022-12-13 17:30:11,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 349 flow [2022-12-13 17:30:11,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 332 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 17:30:11,445 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 252 flow [2022-12-13 17:30:11,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2022-12-13 17:30:11,445 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-12-13 17:30:11,445 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 252 flow [2022-12-13 17:30:11,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 523.2727272727273) internal successors, (5756), 11 states have internal predecessors, (5756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:11,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:11,446 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2022-12-13 17:30:11,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:30:11,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:11,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash 709558335, now seen corresponding path program 2 times [2022-12-13 17:30:11,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:11,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523252469] [2022-12-13 17:30:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:11,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 17:30:11,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523252469] [2022-12-13 17:30:11,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523252469] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:30:11,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:30:11,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:30:11,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730081481] [2022-12-13 17:30:11,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:11,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:30:11,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:30:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:30:11,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 517 out of 1302 [2022-12-13 17:30:11,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 518.2) internal successors, (2591), 5 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:11,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:11,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 517 of 1302 [2022-12-13 17:30:11,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:12,275 INFO L130 PetriNetUnfolder]: 1415/2211 cut-off events. [2022-12-13 17:30:12,275 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 17:30:12,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4507 conditions, 2211 events. 1415/2211 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 10937 event pairs, 1106 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 4493. Up to 2211 conditions per place. [2022-12-13 17:30:12,280 INFO L137 encePairwiseOnDemand]: 1299/1302 looper letters, 66 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2022-12-13 17:30:12,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 372 flow [2022-12-13 17:30:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:30:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:30:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1610 transitions. [2022-12-13 17:30:12,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2022-12-13 17:30:12,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1610 transitions. [2022-12-13 17:30:12,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1610 transitions. [2022-12-13 17:30:12,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:12,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1610 transitions. [2022-12-13 17:30:12,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 536.6666666666666) internal successors, (1610), 3 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:12,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:12,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:12,294 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 252 flow. Second operand 3 states and 1610 transitions. [2022-12-13 17:30:12,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 372 flow [2022-12-13 17:30:12,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 352 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-12-13 17:30:12,296 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 220 flow [2022-12-13 17:30:12,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2022-12-13 17:30:12,297 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2022-12-13 17:30:12,297 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 220 flow [2022-12-13 17:30:12,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 518.2) internal successors, (2591), 5 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:12,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:12,298 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2022-12-13 17:30:12,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:30:12,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:12,299 INFO L85 PathProgramCache]: Analyzing trace with hash 709558333, now seen corresponding path program 1 times [2022-12-13 17:30:12,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:12,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480409671] [2022-12-13 17:30:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:12,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:30:12,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:12,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480409671] [2022-12-13 17:30:12,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480409671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:30:12,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:30:12,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:30:12,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439623431] [2022-12-13 17:30:12,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:12,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:30:12,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:12,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:30:12,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:30:12,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 523 out of 1302 [2022-12-13 17:30:12,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 524.25) internal successors, (2097), 4 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:12,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:12,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 523 of 1302 [2022-12-13 17:30:12,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:12,881 INFO L130 PetriNetUnfolder]: 923/1502 cut-off events. [2022-12-13 17:30:12,881 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 17:30:12,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 1502 events. 923/1502 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7273 event pairs, 707 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 3061. Up to 1502 conditions per place. [2022-12-13 17:30:12,885 INFO L137 encePairwiseOnDemand]: 1299/1302 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2022-12-13 17:30:12,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 336 flow [2022-12-13 17:30:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:30:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:30:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1626 transitions. [2022-12-13 17:30:12,888 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4162826420890937 [2022-12-13 17:30:12,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1626 transitions. [2022-12-13 17:30:12,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1626 transitions. [2022-12-13 17:30:12,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:12,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1626 transitions. [2022-12-13 17:30:12,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 542.0) internal successors, (1626), 3 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:12,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:12,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:12,894 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 220 flow. Second operand 3 states and 1626 transitions. [2022-12-13 17:30:12,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 336 flow [2022-12-13 17:30:12,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:30:12,895 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 207 flow [2022-12-13 17:30:12,895 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=207, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2022-12-13 17:30:12,896 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2022-12-13 17:30:12,896 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 207 flow [2022-12-13 17:30:12,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 524.25) internal successors, (2097), 4 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:12,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:12,897 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-12-13 17:30:12,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:30:12,897 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:12,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1014185935, now seen corresponding path program 1 times [2022-12-13 17:30:12,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:12,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095672705] [2022-12-13 17:30:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:12,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 17:30:13,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095672705] [2022-12-13 17:30:13,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095672705] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:30:13,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:30:13,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:30:13,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246191107] [2022-12-13 17:30:13,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:13,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:30:13,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:30:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:30:13,186 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 517 out of 1302 [2022-12-13 17:30:13,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 518.6) internal successors, (2593), 5 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:13,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:13,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 517 of 1302 [2022-12-13 17:30:13,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:13,457 INFO L130 PetriNetUnfolder]: 885/1431 cut-off events. [2022-12-13 17:30:13,457 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 17:30:13,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2935 conditions, 1431 events. 885/1431 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6886 event pairs, 676 based on Foata normal form. 0/591 useless extension candidates. Maximal degree in co-relation 2919. Up to 1431 conditions per place. [2022-12-13 17:30:13,461 INFO L137 encePairwiseOnDemand]: 1299/1302 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2022-12-13 17:30:13,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 329 flow [2022-12-13 17:30:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:30:13,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:30:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1606 transitions. [2022-12-13 17:30:13,464 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41116231438812084 [2022-12-13 17:30:13,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1606 transitions. [2022-12-13 17:30:13,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1606 transitions. [2022-12-13 17:30:13,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:13,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1606 transitions. [2022-12-13 17:30:13,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 535.3333333333334) internal successors, (1606), 3 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:13,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:13,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:13,470 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 207 flow. Second operand 3 states and 1606 transitions. [2022-12-13 17:30:13,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 329 flow [2022-12-13 17:30:13,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:30:13,471 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 204 flow [2022-12-13 17:30:13,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2022-12-13 17:30:13,471 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2022-12-13 17:30:13,472 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 204 flow [2022-12-13 17:30:13,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 518.6) internal successors, (2593), 5 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:13,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:13,472 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-12-13 17:30:13,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:30:13,472 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1014185934, now seen corresponding path program 1 times [2022-12-13 17:30:13,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:13,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187986716] [2022-12-13 17:30:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:13,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:30:13,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:13,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187986716] [2022-12-13 17:30:13,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187986716] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:30:13,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:30:13,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:30:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768338277] [2022-12-13 17:30:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:13,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:30:13,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:30:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:30:13,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 523 out of 1302 [2022-12-13 17:30:13,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 524.75) internal successors, (2099), 4 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:13,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:13,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 523 of 1302 [2022-12-13 17:30:13,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:13,972 INFO L130 PetriNetUnfolder]: 847/1360 cut-off events. [2022-12-13 17:30:13,972 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 17:30:13,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 1360 events. 847/1360 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 6392 event pairs, 645 based on Foata normal form. 0/580 useless extension candidates. Maximal degree in co-relation 2777. Up to 1360 conditions per place. [2022-12-13 17:30:13,975 INFO L137 encePairwiseOnDemand]: 1299/1302 looper letters, 60 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2022-12-13 17:30:13,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 322 flow [2022-12-13 17:30:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:30:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:30:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1622 transitions. [2022-12-13 17:30:13,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41525857654889914 [2022-12-13 17:30:13,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1622 transitions. [2022-12-13 17:30:13,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1622 transitions. [2022-12-13 17:30:13,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:13,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1622 transitions. [2022-12-13 17:30:13,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 540.6666666666666) internal successors, (1622), 3 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:13,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:13,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:13,986 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 204 flow. Second operand 3 states and 1622 transitions. [2022-12-13 17:30:13,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 322 flow [2022-12-13 17:30:13,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:30:13,987 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 201 flow [2022-12-13 17:30:13,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2022-12-13 17:30:13,987 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2022-12-13 17:30:13,987 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 201 flow [2022-12-13 17:30:13,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 524.75) internal successors, (2099), 4 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:13,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:13,988 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:13,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:30:13,988 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1374986839, now seen corresponding path program 1 times [2022-12-13 17:30:13,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766976689] [2022-12-13 17:30:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:13,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:14,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:14,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766976689] [2022-12-13 17:30:14,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766976689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:14,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61777161] [2022-12-13 17:30:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:14,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:14,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:14,214 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:14,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:30:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:14,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:30:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:14,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:14,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-13 17:30:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:14,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61777161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:14,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:14,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-13 17:30:14,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513521174] [2022-12-13 17:30:14,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:14,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:30:14,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:30:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:30:16,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 506 out of 1302 [2022-12-13 17:30:16,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 201 flow. Second operand has 25 states, 25 states have (on average 507.28) internal successors, (12682), 25 states have internal predecessors, (12682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:16,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:16,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 506 of 1302 [2022-12-13 17:30:16,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:16,955 INFO L130 PetriNetUnfolder]: 2185/3498 cut-off events. [2022-12-13 17:30:16,955 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 17:30:16,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7109 conditions, 3498 events. 2185/3498 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17804 event pairs, 645 based on Foata normal form. 0/1518 useless extension candidates. Maximal degree in co-relation 7091. Up to 1286 conditions per place. [2022-12-13 17:30:16,964 INFO L137 encePairwiseOnDemand]: 1288/1302 looper letters, 122 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2022-12-13 17:30:16,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 139 transitions, 641 flow [2022-12-13 17:30:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:30:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 17:30:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 5205 transitions. [2022-12-13 17:30:16,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39976958525345624 [2022-12-13 17:30:16,971 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 5205 transitions. [2022-12-13 17:30:16,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 5205 transitions. [2022-12-13 17:30:16,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:16,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 5205 transitions. [2022-12-13 17:30:16,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 520.5) internal successors, (5205), 10 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:16,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1302.0) internal successors, (14322), 11 states have internal predecessors, (14322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:16,991 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1302.0) internal successors, (14322), 11 states have internal predecessors, (14322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:16,991 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 201 flow. Second operand 10 states and 5205 transitions. [2022-12-13 17:30:16,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 139 transitions, 641 flow [2022-12-13 17:30:16,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 139 transitions, 640 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:30:16,992 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 281 flow [2022-12-13 17:30:16,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=281, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2022-12-13 17:30:16,993 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-12-13 17:30:16,993 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 281 flow [2022-12-13 17:30:16,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 507.28) internal successors, (12682), 25 states have internal predecessors, (12682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:16,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:16,994 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:16,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:30:17,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 17:30:17,196 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:17,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1374986838, now seen corresponding path program 1 times [2022-12-13 17:30:17,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:17,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96373863] [2022-12-13 17:30:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:17,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 17:30:17,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:17,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96373863] [2022-12-13 17:30:17,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96373863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:30:17,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:30:17,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:30:17,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357966694] [2022-12-13 17:30:17,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:17,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:30:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:30:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:30:17,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 506 out of 1302 [2022-12-13 17:30:17,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 507.8) internal successors, (2539), 5 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:17,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:17,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 506 of 1302 [2022-12-13 17:30:17,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:17,831 INFO L130 PetriNetUnfolder]: 1536/2445 cut-off events. [2022-12-13 17:30:17,831 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2022-12-13 17:30:17,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5440 conditions, 2445 events. 1536/2445 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 11492 event pairs, 1134 based on Foata normal form. 0/1293 useless extension candidates. Maximal degree in co-relation 5418. Up to 2438 conditions per place. [2022-12-13 17:30:17,838 INFO L137 encePairwiseOnDemand]: 1295/1302 looper letters, 59 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2022-12-13 17:30:17,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 61 transitions, 393 flow [2022-12-13 17:30:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:30:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:30:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2075 transitions. [2022-12-13 17:30:17,840 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39842549923195086 [2022-12-13 17:30:17,841 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2075 transitions. [2022-12-13 17:30:17,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2075 transitions. [2022-12-13 17:30:17,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:17,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2075 transitions. [2022-12-13 17:30:17,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 518.75) internal successors, (2075), 4 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:17,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1302.0) internal successors, (6510), 5 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:17,846 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1302.0) internal successors, (6510), 5 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:17,846 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 281 flow. Second operand 4 states and 2075 transitions. [2022-12-13 17:30:17,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 61 transitions, 393 flow [2022-12-13 17:30:17,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 349 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-12-13 17:30:17,848 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 231 flow [2022-12-13 17:30:17,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2022-12-13 17:30:17,848 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -11 predicate places. [2022-12-13 17:30:17,848 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 231 flow [2022-12-13 17:30:17,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 507.8) internal successors, (2539), 5 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:17,849 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:17,849 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:17,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 17:30:17,849 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1374986841, now seen corresponding path program 1 times [2022-12-13 17:30:17,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:17,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124563660] [2022-12-13 17:30:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 17:30:17,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:17,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124563660] [2022-12-13 17:30:17,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124563660] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:30:17,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:30:17,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:30:17,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319865765] [2022-12-13 17:30:17,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:17,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:30:17,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:30:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:30:18,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 506 out of 1302 [2022-12-13 17:30:18,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 508.25) internal successors, (2033), 4 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:18,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:18,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 506 of 1302 [2022-12-13 17:30:18,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:18,322 INFO L130 PetriNetUnfolder]: 1087/1716 cut-off events. [2022-12-13 17:30:18,322 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2022-12-13 17:30:18,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3892 conditions, 1716 events. 1087/1716 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7215 event pairs, 755 based on Foata normal form. 42/1024 useless extension candidates. Maximal degree in co-relation 3874. Up to 1702 conditions per place. [2022-12-13 17:30:18,329 INFO L137 encePairwiseOnDemand]: 1295/1302 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2022-12-13 17:30:18,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 56 transitions, 333 flow [2022-12-13 17:30:18,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:30:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:30:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2070 transitions. [2022-12-13 17:30:18,336 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39746543778801846 [2022-12-13 17:30:18,336 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2070 transitions. [2022-12-13 17:30:18,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2070 transitions. [2022-12-13 17:30:18,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:18,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2070 transitions. [2022-12-13 17:30:18,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 517.5) internal successors, (2070), 4 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:18,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1302.0) internal successors, (6510), 5 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:18,344 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1302.0) internal successors, (6510), 5 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:18,344 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 231 flow. Second operand 4 states and 2070 transitions. [2022-12-13 17:30:18,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 56 transitions, 333 flow [2022-12-13 17:30:18,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 56 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:30:18,346 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 222 flow [2022-12-13 17:30:18,346 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2022-12-13 17:30:18,346 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -15 predicate places. [2022-12-13 17:30:18,346 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 222 flow [2022-12-13 17:30:18,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 508.25) internal successors, (2033), 4 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:18,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:18,347 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:18,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 17:30:18,347 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1374986837, now seen corresponding path program 1 times [2022-12-13 17:30:18,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:18,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95202552] [2022-12-13 17:30:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:18,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:18,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:18,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95202552] [2022-12-13 17:30:18,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95202552] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:18,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175346334] [2022-12-13 17:30:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:18,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:18,621 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:18,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:30:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 17:30:18,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:18,741 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 17:30:18,741 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 17:30:18,868 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 17:30:18,868 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 19 [2022-12-13 17:30:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:18,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:19,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175346334] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:19,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:30:19,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2022-12-13 17:30:19,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167794650] [2022-12-13 17:30:19,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:19,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:30:19,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:19,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:30:19,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-12-13 17:30:20,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 506 out of 1302 [2022-12-13 17:30:20,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 222 flow. Second operand has 10 states, 10 states have (on average 507.2) internal successors, (5072), 10 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:20,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:20,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 506 of 1302 [2022-12-13 17:30:20,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:20,733 INFO L130 PetriNetUnfolder]: 933/1464 cut-off events. [2022-12-13 17:30:20,734 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-12-13 17:30:20,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3382 conditions, 1464 events. 933/1464 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5690 event pairs, 133 based on Foata normal form. 0/898 useless extension candidates. Maximal degree in co-relation 3364. Up to 1126 conditions per place. [2022-12-13 17:30:20,739 INFO L137 encePairwiseOnDemand]: 1292/1302 looper letters, 62 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2022-12-13 17:30:20,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 71 transitions, 397 flow [2022-12-13 17:30:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:30:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:30:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2589 transitions. [2022-12-13 17:30:20,744 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3976958525345622 [2022-12-13 17:30:20,744 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2589 transitions. [2022-12-13 17:30:20,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2589 transitions. [2022-12-13 17:30:20,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:20,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2589 transitions. [2022-12-13 17:30:20,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 517.8) internal successors, (2589), 5 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:20,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1302.0) internal successors, (7812), 6 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:20,755 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1302.0) internal successors, (7812), 6 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:20,755 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 222 flow. Second operand 5 states and 2589 transitions. [2022-12-13 17:30:20,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 71 transitions, 397 flow [2022-12-13 17:30:20,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:30:20,758 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 258 flow [2022-12-13 17:30:20,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2022-12-13 17:30:20,759 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -13 predicate places. [2022-12-13 17:30:20,759 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 258 flow [2022-12-13 17:30:20,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 507.2) internal successors, (5072), 10 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:20,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:20,760 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:20,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:30:20,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 17:30:20,961 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:20,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:20,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1483424907, now seen corresponding path program 1 times [2022-12-13 17:30:20,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:20,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557795167] [2022-12-13 17:30:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:20,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:21,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:21,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557795167] [2022-12-13 17:30:21,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557795167] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:21,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547770673] [2022-12-13 17:30:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:21,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:21,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:21,271 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:21,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:30:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:21,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:30:21,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:21,402 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 17:30:21,402 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 17:30:21,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:30:21,493 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 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 17:30:21,498 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:30:21,498 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 11 treesize of output 11 [2022-12-13 17:30:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:21,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:21,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-12-13 17:30:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:21,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547770673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:21,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:21,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-13 17:30:21,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236710416] [2022-12-13 17:30:21,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:21,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 17:30:21,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:21,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 17:30:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-12-13 17:30:25,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1302 [2022-12-13 17:30:25,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 258 flow. Second operand has 26 states, 26 states have (on average 501.61538461538464) internal successors, (13042), 26 states have internal predecessors, (13042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:25,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:25,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1302 [2022-12-13 17:30:25,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:26,569 INFO L130 PetriNetUnfolder]: 1701/2688 cut-off events. [2022-12-13 17:30:26,569 INFO L131 PetriNetUnfolder]: For 1502/1502 co-relation queries the response was YES. [2022-12-13 17:30:26,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6729 conditions, 2688 events. 1701/2688 cut-off events. For 1502/1502 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12823 event pairs, 629 based on Foata normal form. 0/1788 useless extension candidates. Maximal degree in co-relation 6709. Up to 1453 conditions per place. [2022-12-13 17:30:26,576 INFO L137 encePairwiseOnDemand]: 1294/1302 looper letters, 111 selfloop transitions, 13 changer transitions 0/124 dead transitions. [2022-12-13 17:30:26,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 124 transitions, 810 flow [2022-12-13 17:30:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:30:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 17:30:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 7105 transitions. [2022-12-13 17:30:26,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2022-12-13 17:30:26,583 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 7105 transitions. [2022-12-13 17:30:26,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 7105 transitions. [2022-12-13 17:30:26,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:26,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 7105 transitions. [2022-12-13 17:30:26,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 507.5) internal successors, (7105), 14 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:26,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 1302.0) internal successors, (19530), 15 states have internal predecessors, (19530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:26,600 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 1302.0) internal successors, (19530), 15 states have internal predecessors, (19530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:26,600 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 258 flow. Second operand 14 states and 7105 transitions. [2022-12-13 17:30:26,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 124 transitions, 810 flow [2022-12-13 17:30:26,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 124 transitions, 780 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 17:30:26,603 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 290 flow [2022-12-13 17:30:26,603 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=290, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2022-12-13 17:30:26,603 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2022-12-13 17:30:26,603 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 290 flow [2022-12-13 17:30:26,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 501.61538461538464) internal successors, (13042), 26 states have internal predecessors, (13042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:26,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:26,604 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:26,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 17:30:26,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 17:30:26,805 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1483424864, now seen corresponding path program 1 times [2022-12-13 17:30:26,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:26,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006992442] [2022-12-13 17:30:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:26,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:27,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:27,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006992442] [2022-12-13 17:30:27,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006992442] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:27,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516845526] [2022-12-13 17:30:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:27,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:27,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:27,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:27,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:30:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:27,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:30:27,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:27,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:27,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-13 17:30:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:27,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516845526] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:27,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:27,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-13 17:30:27,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069852014] [2022-12-13 17:30:27,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:27,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:30:27,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:27,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:30:27,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:30:29,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 504 out of 1302 [2022-12-13 17:30:29,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 290 flow. Second operand has 25 states, 25 states have (on average 505.52) internal successors, (12638), 25 states have internal predecessors, (12638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:29,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:29,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 504 of 1302 [2022-12-13 17:30:29,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:30,143 INFO L130 PetriNetUnfolder]: 1445/2284 cut-off events. [2022-12-13 17:30:30,143 INFO L131 PetriNetUnfolder]: For 1536/1536 co-relation queries the response was YES. [2022-12-13 17:30:30,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6322 conditions, 2284 events. 1445/2284 cut-off events. For 1536/1536 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10441 event pairs, 417 based on Foata normal form. 0/1938 useless extension candidates. Maximal degree in co-relation 6300. Up to 1046 conditions per place. [2022-12-13 17:30:30,149 INFO L137 encePairwiseOnDemand]: 1292/1302 looper letters, 106 selfloop transitions, 16 changer transitions 0/122 dead transitions. [2022-12-13 17:30:30,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 812 flow [2022-12-13 17:30:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:30:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 17:30:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 5141 transitions. [2022-12-13 17:30:30,155 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39485407066052225 [2022-12-13 17:30:30,155 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 5141 transitions. [2022-12-13 17:30:30,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 5141 transitions. [2022-12-13 17:30:30,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:30,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 5141 transitions. [2022-12-13 17:30:30,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 514.1) internal successors, (5141), 10 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:30,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1302.0) internal successors, (14322), 11 states have internal predecessors, (14322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:30,166 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1302.0) internal successors, (14322), 11 states have internal predecessors, (14322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:30,166 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 290 flow. Second operand 10 states and 5141 transitions. [2022-12-13 17:30:30,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 812 flow [2022-12-13 17:30:30,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 122 transitions, 779 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-12-13 17:30:30,170 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 299 flow [2022-12-13 17:30:30,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=299, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2022-12-13 17:30:30,171 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-12-13 17:30:30,171 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 299 flow [2022-12-13 17:30:30,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 505.52) internal successors, (12638), 25 states have internal predecessors, (12638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:30,172 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:30,172 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:30,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 17:30:30,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 17:30:30,373 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash -357730688, now seen corresponding path program 1 times [2022-12-13 17:30:30,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:30,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576474416] [2022-12-13 17:30:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:30,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:30,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:30,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576474416] [2022-12-13 17:30:30,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576474416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:30,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070156407] [2022-12-13 17:30:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:30,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:30,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:30,807 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:30,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:30:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:30,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:30:30,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:31,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:31,221 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 76 treesize of output 64 [2022-12-13 17:30:31,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 17:30:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:31,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070156407] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:31,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:31,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-13 17:30:31,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327083983] [2022-12-13 17:30:31,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:31,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 17:30:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:31,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 17:30:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-12-13 17:30:34,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 504 out of 1302 [2022-12-13 17:30:34,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 58 transitions, 299 flow. Second operand has 32 states, 32 states have (on average 505.375) internal successors, (16172), 32 states have internal predecessors, (16172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:34,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:34,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 504 of 1302 [2022-12-13 17:30:34,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:35,615 INFO L130 PetriNetUnfolder]: 2873/4470 cut-off events. [2022-12-13 17:30:35,615 INFO L131 PetriNetUnfolder]: For 5196/5196 co-relation queries the response was YES. [2022-12-13 17:30:35,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13751 conditions, 4470 events. 2873/4470 cut-off events. For 5196/5196 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 22544 event pairs, 417 based on Foata normal form. 222/4018 useless extension candidates. Maximal degree in co-relation 13727. Up to 1046 conditions per place. [2022-12-13 17:30:35,632 INFO L137 encePairwiseOnDemand]: 1292/1302 looper letters, 208 selfloop transitions, 19 changer transitions 0/227 dead transitions. [2022-12-13 17:30:35,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 227 transitions, 1514 flow [2022-12-13 17:30:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:30:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 17:30:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 6738 transitions. [2022-12-13 17:30:35,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3980857851825594 [2022-12-13 17:30:35,638 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 6738 transitions. [2022-12-13 17:30:35,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 6738 transitions. [2022-12-13 17:30:35,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:35,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 6738 transitions. [2022-12-13 17:30:35,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 518.3076923076923) internal successors, (6738), 13 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:35,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 1302.0) internal successors, (18228), 14 states have internal predecessors, (18228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:35,654 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 1302.0) internal successors, (18228), 14 states have internal predecessors, (18228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:35,654 INFO L175 Difference]: Start difference. First operand has 79 places, 58 transitions, 299 flow. Second operand 13 states and 6738 transitions. [2022-12-13 17:30:35,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 227 transitions, 1514 flow [2022-12-13 17:30:35,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 227 transitions, 1445 flow, removed 16 selfloop flow, removed 10 redundant places. [2022-12-13 17:30:35,662 INFO L231 Difference]: Finished difference. Result has 85 places, 63 transitions, 343 flow [2022-12-13 17:30:35,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=343, PETRI_PLACES=85, PETRI_TRANSITIONS=63} [2022-12-13 17:30:35,662 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 11 predicate places. [2022-12-13 17:30:35,662 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 63 transitions, 343 flow [2022-12-13 17:30:35,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 505.375) internal successors, (16172), 32 states have internal predecessors, (16172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:35,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:35,664 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:35,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:30:35,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:35,865 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash -357730685, now seen corresponding path program 1 times [2022-12-13 17:30:35,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:35,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334239044] [2022-12-13 17:30:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 17:30:36,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:36,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334239044] [2022-12-13 17:30:36,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334239044] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:36,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012725916] [2022-12-13 17:30:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:36,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:36,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:36,263 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:36,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:30:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:36,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 17:30:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:36,429 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 17:30:36,429 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 17:30:36,527 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 17:30:36,527 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 19 [2022-12-13 17:30:36,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-13 17:30:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:36,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:36,785 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 76 treesize of output 64 [2022-12-13 17:30:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:37,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012725916] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:37,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:37,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-12-13 17:30:37,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854102323] [2022-12-13 17:30:37,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:37,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 17:30:37,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 17:30:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:30:41,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 490 out of 1302 [2022-12-13 17:30:41,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 63 transitions, 343 flow. Second operand has 30 states, 30 states have (on average 491.53333333333336) internal successors, (14746), 30 states have internal predecessors, (14746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:41,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:41,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 490 of 1302 [2022-12-13 17:30:41,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:42,896 INFO L130 PetriNetUnfolder]: 1957/3110 cut-off events. [2022-12-13 17:30:42,896 INFO L131 PetriNetUnfolder]: For 4671/4671 co-relation queries the response was YES. [2022-12-13 17:30:42,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9494 conditions, 3110 events. 1957/3110 cut-off events. For 4671/4671 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14994 event pairs, 417 based on Foata normal form. 296/3136 useless extension candidates. Maximal degree in co-relation 9468. Up to 1046 conditions per place. [2022-12-13 17:30:42,906 INFO L137 encePairwiseOnDemand]: 1293/1302 looper letters, 200 selfloop transitions, 19 changer transitions 0/219 dead transitions. [2022-12-13 17:30:42,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 219 transitions, 1448 flow [2022-12-13 17:30:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:30:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 17:30:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 9985 transitions. [2022-12-13 17:30:42,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3834485407066052 [2022-12-13 17:30:42,914 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 9985 transitions. [2022-12-13 17:30:42,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 9985 transitions. [2022-12-13 17:30:42,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:42,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 9985 transitions. [2022-12-13 17:30:42,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 499.25) internal successors, (9985), 20 states have internal predecessors, (9985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:42,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 1302.0) internal successors, (27342), 21 states have internal predecessors, (27342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:42,935 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 1302.0) internal successors, (27342), 21 states have internal predecessors, (27342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:42,935 INFO L175 Difference]: Start difference. First operand has 85 places, 63 transitions, 343 flow. Second operand 20 states and 9985 transitions. [2022-12-13 17:30:42,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 219 transitions, 1448 flow [2022-12-13 17:30:42,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 219 transitions, 1406 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-12-13 17:30:42,944 INFO L231 Difference]: Finished difference. Result has 91 places, 59 transitions, 311 flow [2022-12-13 17:30:42,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=311, PETRI_PLACES=91, PETRI_TRANSITIONS=59} [2022-12-13 17:30:42,944 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2022-12-13 17:30:42,944 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 59 transitions, 311 flow [2022-12-13 17:30:42,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 491.53333333333336) internal successors, (14746), 30 states have internal predecessors, (14746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:42,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:42,946 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:42,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 17:30:43,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 17:30:43,147 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:43,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1241193577, now seen corresponding path program 1 times [2022-12-13 17:30:43,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:43,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782378615] [2022-12-13 17:30:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:43,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 17:30:43,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:43,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782378615] [2022-12-13 17:30:43,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782378615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:43,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059258179] [2022-12-13 17:30:43,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:43,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:43,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:43,422 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:43,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:30:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:43,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:30:43,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:43,750 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 12 treesize of output 5 [2022-12-13 17:30:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:30:43,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:30:43,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059258179] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:43,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:30:43,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 15 [2022-12-13 17:30:43,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368628240] [2022-12-13 17:30:43,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:43,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:30:43,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:43,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:30:43,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:30:44,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 516 out of 1302 [2022-12-13 17:30:44,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 59 transitions, 311 flow. Second operand has 4 states, 4 states have (on average 519.25) internal successors, (2077), 4 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:44,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:44,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 516 of 1302 [2022-12-13 17:30:44,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:44,960 INFO L130 PetriNetUnfolder]: 2187/3530 cut-off events. [2022-12-13 17:30:44,960 INFO L131 PetriNetUnfolder]: For 4367/4367 co-relation queries the response was YES. [2022-12-13 17:30:44,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10633 conditions, 3530 events. 2187/3530 cut-off events. For 4367/4367 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 17457 event pairs, 1257 based on Foata normal form. 150/3410 useless extension candidates. Maximal degree in co-relation 10608. Up to 2547 conditions per place. [2022-12-13 17:30:44,970 INFO L137 encePairwiseOnDemand]: 1296/1302 looper letters, 77 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-12-13 17:30:44,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 572 flow [2022-12-13 17:30:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:30:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:30:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1603 transitions. [2022-12-13 17:30:44,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4103942652329749 [2022-12-13 17:30:44,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1603 transitions. [2022-12-13 17:30:44,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1603 transitions. [2022-12-13 17:30:44,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:44,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1603 transitions. [2022-12-13 17:30:44,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 534.3333333333334) internal successors, (1603), 3 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:44,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:44,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:44,978 INFO L175 Difference]: Start difference. First operand has 91 places, 59 transitions, 311 flow. Second operand 3 states and 1603 transitions. [2022-12-13 17:30:44,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 572 flow [2022-12-13 17:30:44,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 512 flow, removed 2 selfloop flow, removed 19 redundant places. [2022-12-13 17:30:44,984 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 283 flow [2022-12-13 17:30:44,984 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2022-12-13 17:30:44,984 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2022-12-13 17:30:44,984 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 283 flow [2022-12-13 17:30:44,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 519.25) internal successors, (2077), 4 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:44,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:44,985 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:44,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 17:30:45,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:45,186 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:30:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:45,187 INFO L85 PathProgramCache]: Analyzing trace with hash 175605240, now seen corresponding path program 1 times [2022-12-13 17:30:45,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:45,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013045175] [2022-12-13 17:30:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:45,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 17:30:45,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:45,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013045175] [2022-12-13 17:30:45,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013045175] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:45,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998213823] [2022-12-13 17:30:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:45,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:45,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:45,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:45,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:30:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:45,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 17:30:45,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:45,655 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 17:30:45,655 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 17:30:45,744 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:30:45,744 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 14 treesize of output 20 [2022-12-13 17:30:45,752 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:30:45,752 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 11 treesize of output 11 [2022-12-13 17:30:45,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 105 treesize of output 97 [2022-12-13 17:30:45,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 97 treesize of output 95 [2022-12-13 17:30:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:45,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:45,962 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 122 treesize of output 110 [2022-12-13 17:30:45,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 108 [2022-12-13 17:30:52,110 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:30:52,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-13 17:30:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:30:52,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998213823] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:52,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:52,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 26 [2022-12-13 17:30:52,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842333867] [2022-12-13 17:30:52,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:52,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 17:30:52,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:52,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 17:30:52,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-12-13 17:30:55,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:30:57,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:30:59,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:31:01,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:31:04,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:31:06,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:31:08,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:31:11,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:31:13,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:31:16,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:31:18,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:31:20,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:31:21,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 1302 [2022-12-13 17:31:21,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 283 flow. Second operand has 28 states, 28 states have (on average 477.85714285714283) internal successors, (13380), 28 states have internal predecessors, (13380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:21,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:21,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 1302 [2022-12-13 17:31:21,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:22,873 INFO L130 PetriNetUnfolder]: 3897/6220 cut-off events. [2022-12-13 17:31:22,873 INFO L131 PetriNetUnfolder]: For 6770/6770 co-relation queries the response was YES. [2022-12-13 17:31:22,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18997 conditions, 6220 events. 3897/6220 cut-off events. For 6770/6770 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 31495 event pairs, 275 based on Foata normal form. 90/5980 useless extension candidates. Maximal degree in co-relation 18973. Up to 1906 conditions per place. [2022-12-13 17:31:22,890 INFO L137 encePairwiseOnDemand]: 1290/1302 looper letters, 165 selfloop transitions, 23 changer transitions 0/188 dead transitions. [2022-12-13 17:31:22,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 188 transitions, 1240 flow [2022-12-13 17:31:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 17:31:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 17:31:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 8717 transitions. [2022-12-13 17:31:22,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3719491380781703 [2022-12-13 17:31:22,897 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 8717 transitions. [2022-12-13 17:31:22,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 8717 transitions. [2022-12-13 17:31:22,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:22,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 8717 transitions. [2022-12-13 17:31:22,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 484.27777777777777) internal successors, (8717), 18 states have internal predecessors, (8717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:22,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 1302.0) internal successors, (24738), 19 states have internal predecessors, (24738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:22,914 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 1302.0) internal successors, (24738), 19 states have internal predecessors, (24738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:22,914 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 283 flow. Second operand 18 states and 8717 transitions. [2022-12-13 17:31:22,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 188 transitions, 1240 flow [2022-12-13 17:31:22,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 188 transitions, 1231 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:31:22,937 INFO L231 Difference]: Finished difference. Result has 97 places, 68 transitions, 425 flow [2022-12-13 17:31:22,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=425, PETRI_PLACES=97, PETRI_TRANSITIONS=68} [2022-12-13 17:31:22,938 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2022-12-13 17:31:22,938 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 68 transitions, 425 flow [2022-12-13 17:31:22,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 477.85714285714283) internal successors, (13380), 28 states have internal predecessors, (13380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:22,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:22,939 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:22,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 17:31:23,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:23,141 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1936307281, now seen corresponding path program 1 times [2022-12-13 17:31:23,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:23,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368988113] [2022-12-13 17:31:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:23,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:31:23,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:23,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368988113] [2022-12-13 17:31:23,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368988113] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:23,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:23,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:31:23,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754185873] [2022-12-13 17:31:23,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:23,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:31:23,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:31:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:31:23,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 512 out of 1302 [2022-12-13 17:31:23,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 68 transitions, 425 flow. Second operand has 4 states, 4 states have (on average 515.75) internal successors, (2063), 4 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:23,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:23,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 512 of 1302 [2022-12-13 17:31:23,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:24,991 INFO L130 PetriNetUnfolder]: 3896/6224 cut-off events. [2022-12-13 17:31:24,991 INFO L131 PetriNetUnfolder]: For 8055/8055 co-relation queries the response was YES. [2022-12-13 17:31:24,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20311 conditions, 6224 events. 3896/6224 cut-off events. For 8055/8055 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 32626 event pairs, 2957 based on Foata normal form. 1/5895 useless extension candidates. Maximal degree in co-relation 20281. Up to 6075 conditions per place. [2022-12-13 17:31:25,010 INFO L137 encePairwiseOnDemand]: 1299/1302 looper letters, 83 selfloop transitions, 1 changer transitions 5/89 dead transitions. [2022-12-13 17:31:25,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 89 transitions, 684 flow [2022-12-13 17:31:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:31:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:31:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2102 transitions. [2022-12-13 17:31:25,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40360983102918585 [2022-12-13 17:31:25,013 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2102 transitions. [2022-12-13 17:31:25,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2102 transitions. [2022-12-13 17:31:25,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:25,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2102 transitions. [2022-12-13 17:31:25,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 525.5) internal successors, (2102), 4 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:25,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1302.0) internal successors, (6510), 5 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:25,017 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1302.0) internal successors, (6510), 5 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:25,017 INFO L175 Difference]: Start difference. First operand has 97 places, 68 transitions, 425 flow. Second operand 4 states and 2102 transitions. [2022-12-13 17:31:25,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 89 transitions, 684 flow [2022-12-13 17:31:25,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 658 flow, removed 1 selfloop flow, removed 12 redundant places. [2022-12-13 17:31:25,030 INFO L231 Difference]: Finished difference. Result has 90 places, 68 transitions, 406 flow [2022-12-13 17:31:25,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=90, PETRI_TRANSITIONS=68} [2022-12-13 17:31:25,030 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2022-12-13 17:31:25,030 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 68 transitions, 406 flow [2022-12-13 17:31:25,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 515.75) internal successors, (2063), 4 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:25,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:25,030 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:25,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 17:31:25,031 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:25,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1788586933, now seen corresponding path program 2 times [2022-12-13 17:31:25,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:25,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816685987] [2022-12-13 17:31:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:25,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:31:25,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:25,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816685987] [2022-12-13 17:31:25,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816685987] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:25,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:25,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:31:25,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246132748] [2022-12-13 17:31:25,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:25,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:31:25,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:25,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:31:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:31:25,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 512 out of 1302 [2022-12-13 17:31:25,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 68 transitions, 406 flow. Second operand has 4 states, 4 states have (on average 515.75) internal successors, (2063), 4 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:25,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:25,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 512 of 1302 [2022-12-13 17:31:25,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:26,999 INFO L130 PetriNetUnfolder]: 3998/6482 cut-off events. [2022-12-13 17:31:26,999 INFO L131 PetriNetUnfolder]: For 8658/8658 co-relation queries the response was YES. [2022-12-13 17:31:27,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21320 conditions, 6482 events. 3998/6482 cut-off events. For 8658/8658 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 35152 event pairs, 3025 based on Foata normal form. 1/6099 useless extension candidates. Maximal degree in co-relation 21289. Up to 6071 conditions per place. [2022-12-13 17:31:27,020 INFO L137 encePairwiseOnDemand]: 1299/1302 looper letters, 106 selfloop transitions, 1 changer transitions 5/112 dead transitions. [2022-12-13 17:31:27,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 916 flow [2022-12-13 17:31:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:31:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:31:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2114 transitions. [2022-12-13 17:31:27,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40591397849462363 [2022-12-13 17:31:27,022 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2114 transitions. [2022-12-13 17:31:27,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2114 transitions. [2022-12-13 17:31:27,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:27,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2114 transitions. [2022-12-13 17:31:27,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 528.5) internal successors, (2114), 4 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:27,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1302.0) internal successors, (6510), 5 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:27,028 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1302.0) internal successors, (6510), 5 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:27,028 INFO L175 Difference]: Start difference. First operand has 90 places, 68 transitions, 406 flow. Second operand 4 states and 2114 transitions. [2022-12-13 17:31:27,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 916 flow [2022-12-13 17:31:27,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 910 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 17:31:27,048 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 410 flow [2022-12-13 17:31:27,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=410, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2022-12-13 17:31:27,049 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2022-12-13 17:31:27,049 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 410 flow [2022-12-13 17:31:27,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 515.75) internal successors, (2063), 4 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:27,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:27,050 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:27,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 17:31:27,050 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:27,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:27,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1337425487, now seen corresponding path program 2 times [2022-12-13 17:31:27,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:27,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851875599] [2022-12-13 17:31:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:27,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:31:27,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:27,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851875599] [2022-12-13 17:31:27,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851875599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:31:27,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486579807] [2022-12-13 17:31:27,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:31:27,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:27,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:31:27,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:31:27,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:31:27,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:31:27,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:31:27,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 17:31:27,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:31:27,802 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 71 treesize of output 59 [2022-12-13 17:31:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:31:27,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:31:27,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486579807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:27,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:31:27,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2022-12-13 17:31:27,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331861299] [2022-12-13 17:31:27,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:27,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:31:27,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:27,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:31:27,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:31:27,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 1302 [2022-12-13 17:31:27,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 410 flow. Second operand has 8 states, 8 states have (on average 530.875) internal successors, (4247), 8 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:27,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:27,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 1302 [2022-12-13 17:31:27,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:29,324 INFO L130 PetriNetUnfolder]: 3592/5921 cut-off events. [2022-12-13 17:31:29,324 INFO L131 PetriNetUnfolder]: For 10484/10484 co-relation queries the response was YES. [2022-12-13 17:31:29,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19127 conditions, 5921 events. 3592/5921 cut-off events. For 10484/10484 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 32595 event pairs, 416 based on Foata normal form. 300/5861 useless extension candidates. Maximal degree in co-relation 19095. Up to 1046 conditions per place. [2022-12-13 17:31:29,348 INFO L137 encePairwiseOnDemand]: 1299/1302 looper letters, 305 selfloop transitions, 6 changer transitions 0/311 dead transitions. [2022-12-13 17:31:29,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 311 transitions, 2688 flow [2022-12-13 17:31:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:31:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:31:29,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 4423 transitions. [2022-12-13 17:31:29,354 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4246351766513057 [2022-12-13 17:31:29,354 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 4423 transitions. [2022-12-13 17:31:29,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 4423 transitions. [2022-12-13 17:31:29,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:29,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 4423 transitions. [2022-12-13 17:31:29,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 552.875) internal successors, (4423), 8 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:29,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1302.0) internal successors, (11718), 9 states have internal predecessors, (11718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:29,366 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1302.0) internal successors, (11718), 9 states have internal predecessors, (11718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:29,366 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 410 flow. Second operand 8 states and 4423 transitions. [2022-12-13 17:31:29,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 311 transitions, 2688 flow [2022-12-13 17:31:29,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 311 transitions, 2660 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-12-13 17:31:29,393 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 390 flow [2022-12-13 17:31:29,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=390, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2022-12-13 17:31:29,394 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2022-12-13 17:31:29,394 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 390 flow [2022-12-13 17:31:29,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 530.875) internal successors, (4247), 8 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:29,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:29,394 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:29,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 17:31:29,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 17:31:29,596 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:29,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1215415851, now seen corresponding path program 1 times [2022-12-13 17:31:29,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:29,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924450110] [2022-12-13 17:31:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:29,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:31:29,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924450110] [2022-12-13 17:31:29,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924450110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:29,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:29,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:31:29,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592656001] [2022-12-13 17:31:29,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:29,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:31:29,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:29,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:31:29,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:31:29,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 1302 [2022-12-13 17:31:29,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 66 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 532.3333333333334) internal successors, (1597), 3 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:29,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:29,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 1302 [2022-12-13 17:31:29,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:30,903 INFO L130 PetriNetUnfolder]: 3638/5955 cut-off events. [2022-12-13 17:31:30,903 INFO L131 PetriNetUnfolder]: For 6324/6324 co-relation queries the response was YES. [2022-12-13 17:31:30,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19148 conditions, 5955 events. 3638/5955 cut-off events. For 6324/6324 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 31322 event pairs, 2784 based on Foata normal form. 30/5625 useless extension candidates. Maximal degree in co-relation 19122. Up to 5494 conditions per place. [2022-12-13 17:31:30,921 INFO L137 encePairwiseOnDemand]: 1297/1302 looper letters, 80 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2022-12-13 17:31:30,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 84 transitions, 628 flow [2022-12-13 17:31:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:31:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:31:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1634 transitions. [2022-12-13 17:31:30,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41833077316948286 [2022-12-13 17:31:30,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1634 transitions. [2022-12-13 17:31:30,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1634 transitions. [2022-12-13 17:31:30,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:30,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1634 transitions. [2022-12-13 17:31:30,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 544.6666666666666) internal successors, (1634), 3 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:30,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:30,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:30,926 INFO L175 Difference]: Start difference. First operand has 89 places, 66 transitions, 390 flow. Second operand 3 states and 1634 transitions. [2022-12-13 17:31:30,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 84 transitions, 628 flow [2022-12-13 17:31:30,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 606 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 17:31:30,936 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 410 flow [2022-12-13 17:31:30,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=410, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2022-12-13 17:31:30,936 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2022-12-13 17:31:30,937 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 410 flow [2022-12-13 17:31:30,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 532.3333333333334) internal successors, (1597), 3 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:30,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:30,937 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:30,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 17:31:30,937 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:30,937 INFO L85 PathProgramCache]: Analyzing trace with hash -336205794, now seen corresponding path program 1 times [2022-12-13 17:31:30,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:30,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655030694] [2022-12-13 17:31:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:30,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:31:31,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655030694] [2022-12-13 17:31:31,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655030694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:31,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:31,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:31:31,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309265903] [2022-12-13 17:31:31,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:31,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:31:31,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:31:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:31:31,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 1302 [2022-12-13 17:31:31,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 410 flow. Second operand has 3 states, 3 states have (on average 532.3333333333334) internal successors, (1597), 3 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:31,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:31,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 1302 [2022-12-13 17:31:31,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:32,264 INFO L130 PetriNetUnfolder]: 3380/5537 cut-off events. [2022-12-13 17:31:32,264 INFO L131 PetriNetUnfolder]: For 5887/5887 co-relation queries the response was YES. [2022-12-13 17:31:32,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17945 conditions, 5537 events. 3380/5537 cut-off events. For 5887/5887 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 29606 event pairs, 2600 based on Foata normal form. 150/5351 useless extension candidates. Maximal degree in co-relation 17918. Up to 5130 conditions per place. [2022-12-13 17:31:32,283 INFO L137 encePairwiseOnDemand]: 1299/1302 looper letters, 108 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2022-12-13 17:31:32,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 110 transitions, 931 flow [2022-12-13 17:31:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:31:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:31:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1641 transitions. [2022-12-13 17:31:32,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4201228878648233 [2022-12-13 17:31:32,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1641 transitions. [2022-12-13 17:31:32,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1641 transitions. [2022-12-13 17:31:32,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:32,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1641 transitions. [2022-12-13 17:31:32,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 547.0) internal successors, (1641), 3 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:32,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:32,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:32,289 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 410 flow. Second operand 3 states and 1641 transitions. [2022-12-13 17:31:32,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 110 transitions, 931 flow [2022-12-13 17:31:32,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 110 transitions, 921 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:31:32,297 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 412 flow [2022-12-13 17:31:32,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2022-12-13 17:31:32,298 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-12-13 17:31:32,298 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 412 flow [2022-12-13 17:31:32,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 532.3333333333334) internal successors, (1597), 3 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:32,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:32,298 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:32,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 17:31:32,298 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:32,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:32,298 INFO L85 PathProgramCache]: Analyzing trace with hash -314713981, now seen corresponding path program 1 times [2022-12-13 17:31:32,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:32,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646479491] [2022-12-13 17:31:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:32,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 17:31:32,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:32,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646479491] [2022-12-13 17:31:32,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646479491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:32,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:32,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:31:32,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116338952] [2022-12-13 17:31:32,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:32,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:31:32,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:32,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:31:32,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:31:32,501 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 526 out of 1302 [2022-12-13 17:31:32,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 531.6666666666666) internal successors, (1595), 3 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:32,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:32,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 526 of 1302 [2022-12-13 17:31:32,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:33,539 INFO L130 PetriNetUnfolder]: 3374/5531 cut-off events. [2022-12-13 17:31:33,539 INFO L131 PetriNetUnfolder]: For 6864/6864 co-relation queries the response was YES. [2022-12-13 17:31:33,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18882 conditions, 5531 events. 3374/5531 cut-off events. For 6864/6864 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 29535 event pairs, 2547 based on Foata normal form. 6/5201 useless extension candidates. Maximal degree in co-relation 18854. Up to 5013 conditions per place. [2022-12-13 17:31:33,556 INFO L137 encePairwiseOnDemand]: 1298/1302 looper letters, 114 selfloop transitions, 2 changer transitions 2/118 dead transitions. [2022-12-13 17:31:33,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 118 transitions, 960 flow [2022-12-13 17:31:33,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:31:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:31:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1642 transitions. [2022-12-13 17:31:33,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.420378904249872 [2022-12-13 17:31:33,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1642 transitions. [2022-12-13 17:31:33,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1642 transitions. [2022-12-13 17:31:33,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:33,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1642 transitions. [2022-12-13 17:31:33,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 547.3333333333334) internal successors, (1642), 3 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:33,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:33,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:33,561 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 412 flow. Second operand 3 states and 1642 transitions. [2022-12-13 17:31:33,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 118 transitions, 960 flow [2022-12-13 17:31:33,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 118 transitions, 954 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:31:33,570 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 418 flow [2022-12-13 17:31:33,570 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2022-12-13 17:31:33,570 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2022-12-13 17:31:33,570 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 418 flow [2022-12-13 17:31:33,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 531.6666666666666) internal successors, (1595), 3 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:33,571 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:33,571 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:33,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 17:31:33,571 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:33,571 INFO L85 PathProgramCache]: Analyzing trace with hash -694274219, now seen corresponding path program 2 times [2022-12-13 17:31:33,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:33,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713751755] [2022-12-13 17:31:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:33,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 17:31:33,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:33,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713751755] [2022-12-13 17:31:33,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713751755] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:33,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:33,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:31:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985588656] [2022-12-13 17:31:33,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:33,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:31:33,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:31:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:31:33,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 1302 [2022-12-13 17:31:33,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 533.6666666666666) internal successors, (1601), 3 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:33,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:33,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 1302 [2022-12-13 17:31:33,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:34,691 INFO L130 PetriNetUnfolder]: 3073/5024 cut-off events. [2022-12-13 17:31:34,691 INFO L131 PetriNetUnfolder]: For 7334/7334 co-relation queries the response was YES. [2022-12-13 17:31:34,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17001 conditions, 5024 events. 3073/5024 cut-off events. For 7334/7334 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 25995 event pairs, 1566 based on Foata normal form. 166/4878 useless extension candidates. Maximal degree in co-relation 16972. Up to 4993 conditions per place. [2022-12-13 17:31:34,708 INFO L137 encePairwiseOnDemand]: 1298/1302 looper letters, 70 selfloop transitions, 2 changer transitions 4/76 dead transitions. [2022-12-13 17:31:34,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 76 transitions, 604 flow [2022-12-13 17:31:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:31:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:31:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1629 transitions. [2022-12-13 17:31:34,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41705069124423966 [2022-12-13 17:31:34,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1629 transitions. [2022-12-13 17:31:34,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1629 transitions. [2022-12-13 17:31:34,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:34,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1629 transitions. [2022-12-13 17:31:34,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 543.0) internal successors, (1629), 3 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:34,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:34,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1302.0) internal successors, (5208), 4 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:34,714 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 418 flow. Second operand 3 states and 1629 transitions. [2022-12-13 17:31:34,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 76 transitions, 604 flow [2022-12-13 17:31:34,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 76 transitions, 596 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 17:31:34,722 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 432 flow [2022-12-13 17:31:34,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2022-12-13 17:31:34,723 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2022-12-13 17:31:34,723 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 432 flow [2022-12-13 17:31:34,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 533.6666666666666) internal successors, (1601), 3 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:34,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:34,723 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:34,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 17:31:34,723 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1214611587, now seen corresponding path program 1 times [2022-12-13 17:31:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731874978] [2022-12-13 17:31:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:34,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:31:35,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:35,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731874978] [2022-12-13 17:31:35,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731874978] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:31:35,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060273035] [2022-12-13 17:31:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:35,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:35,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:31:35,007 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:31:35,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 17:31:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:35,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:31:35,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:31:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:31:35,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:31:35,389 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 122 treesize of output 110 [2022-12-13 17:31:35,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 108 [2022-12-13 17:31:35,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 17:31:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:31:35,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060273035] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:31:35,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:31:35,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2022-12-13 17:31:35,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684698939] [2022-12-13 17:31:35,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:31:35,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 17:31:35,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 17:31:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 17:31:37,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 501 out of 1302 [2022-12-13 17:31:37,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 432 flow. Second operand has 34 states, 34 states have (on average 503.0) internal successors, (17102), 34 states have internal predecessors, (17102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:37,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:37,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 501 of 1302 [2022-12-13 17:31:37,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:39,575 INFO L130 PetriNetUnfolder]: 4003/6526 cut-off events. [2022-12-13 17:31:39,575 INFO L131 PetriNetUnfolder]: For 8611/8611 co-relation queries the response was YES. [2022-12-13 17:31:39,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22133 conditions, 6526 events. 4003/6526 cut-off events. For 8611/8611 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 32123 event pairs, 699 based on Foata normal form. 286/6396 useless extension candidates. Maximal degree in co-relation 22106. Up to 1380 conditions per place. [2022-12-13 17:31:39,595 INFO L137 encePairwiseOnDemand]: 1288/1302 looper letters, 186 selfloop transitions, 28 changer transitions 0/214 dead transitions. [2022-12-13 17:31:39,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 214 transitions, 1496 flow [2022-12-13 17:31:39,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 17:31:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 17:31:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 7689 transitions. [2022-12-13 17:31:39,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3937019969278034 [2022-12-13 17:31:39,601 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 7689 transitions. [2022-12-13 17:31:39,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 7689 transitions. [2022-12-13 17:31:39,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:39,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 7689 transitions. [2022-12-13 17:31:39,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 512.6) internal successors, (7689), 15 states have internal predecessors, (7689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:39,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 1302.0) internal successors, (20832), 16 states have internal predecessors, (20832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:39,615 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 1302.0) internal successors, (20832), 16 states have internal predecessors, (20832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:39,615 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 432 flow. Second operand 15 states and 7689 transitions. [2022-12-13 17:31:39,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 214 transitions, 1496 flow [2022-12-13 17:31:39,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 214 transitions, 1474 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-12-13 17:31:39,625 INFO L231 Difference]: Finished difference. Result has 104 places, 76 transitions, 598 flow [2022-12-13 17:31:39,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=598, PETRI_PLACES=104, PETRI_TRANSITIONS=76} [2022-12-13 17:31:39,626 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2022-12-13 17:31:39,626 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 76 transitions, 598 flow [2022-12-13 17:31:39,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 503.0) internal successors, (17102), 34 states have internal predecessors, (17102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:39,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:39,627 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:39,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 17:31:39,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 17:31:39,829 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:39,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2146130391, now seen corresponding path program 1 times [2022-12-13 17:31:39,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611501748] [2022-12-13 17:31:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:39,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:31:40,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611501748] [2022-12-13 17:31:40,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611501748] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:40,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:40,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 17:31:40,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346864698] [2022-12-13 17:31:40,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:40,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:31:40,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:31:40,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:31:40,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 512 out of 1302 [2022-12-13 17:31:40,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 76 transitions, 598 flow. Second operand has 6 states, 6 states have (on average 515.8333333333334) internal successors, (3095), 6 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:40,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:40,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 512 of 1302 [2022-12-13 17:31:40,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:41,928 INFO L130 PetriNetUnfolder]: 4312/7039 cut-off events. [2022-12-13 17:31:41,928 INFO L131 PetriNetUnfolder]: For 13322/13322 co-relation queries the response was YES. [2022-12-13 17:31:41,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25225 conditions, 7039 events. 4312/7039 cut-off events. For 13322/13322 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 36214 event pairs, 2932 based on Foata normal form. 26/6649 useless extension candidates. Maximal degree in co-relation 25192. Up to 6142 conditions per place. [2022-12-13 17:31:41,959 INFO L137 encePairwiseOnDemand]: 1292/1302 looper letters, 104 selfloop transitions, 15 changer transitions 0/119 dead transitions. [2022-12-13 17:31:41,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 119 transitions, 1016 flow [2022-12-13 17:31:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:31:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:31:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2631 transitions. [2022-12-13 17:31:41,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.404147465437788 [2022-12-13 17:31:41,962 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2631 transitions. [2022-12-13 17:31:41,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2631 transitions. [2022-12-13 17:31:41,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:41,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2631 transitions. [2022-12-13 17:31:41,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 526.2) internal successors, (2631), 5 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:41,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1302.0) internal successors, (7812), 6 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:41,968 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1302.0) internal successors, (7812), 6 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:41,968 INFO L175 Difference]: Start difference. First operand has 104 places, 76 transitions, 598 flow. Second operand 5 states and 2631 transitions. [2022-12-13 17:31:41,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 119 transitions, 1016 flow [2022-12-13 17:31:42,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 969 flow, removed 2 selfloop flow, removed 10 redundant places. [2022-12-13 17:31:42,015 INFO L231 Difference]: Finished difference. Result has 101 places, 84 transitions, 662 flow [2022-12-13 17:31:42,015 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=662, PETRI_PLACES=101, PETRI_TRANSITIONS=84} [2022-12-13 17:31:42,015 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 27 predicate places. [2022-12-13 17:31:42,015 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 84 transitions, 662 flow [2022-12-13 17:31:42,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 515.8333333333334) internal successors, (3095), 6 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:42,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:42,015 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:42,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 17:31:42,016 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash -273511853, now seen corresponding path program 2 times [2022-12-13 17:31:42,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:42,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430537484] [2022-12-13 17:31:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:42,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 17:31:42,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:42,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430537484] [2022-12-13 17:31:42,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430537484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:42,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:42,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 17:31:42,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676037184] [2022-12-13 17:31:42,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:42,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:31:42,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:42,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:31:42,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:31:43,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 505 out of 1302 [2022-12-13 17:31:43,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 84 transitions, 662 flow. Second operand has 9 states, 9 states have (on average 507.55555555555554) internal successors, (4568), 9 states have internal predecessors, (4568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:43,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:43,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 505 of 1302 [2022-12-13 17:31:43,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:44,547 INFO L130 PetriNetUnfolder]: 4452/7279 cut-off events. [2022-12-13 17:31:44,548 INFO L131 PetriNetUnfolder]: For 14343/14343 co-relation queries the response was YES. [2022-12-13 17:31:44,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27011 conditions, 7279 events. 4452/7279 cut-off events. For 14343/14343 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 37210 event pairs, 3102 based on Foata normal form. 25/7174 useless extension candidates. Maximal degree in co-relation 26976. Up to 6134 conditions per place. [2022-12-13 17:31:44,579 INFO L137 encePairwiseOnDemand]: 1291/1302 looper letters, 103 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2022-12-13 17:31:44,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 120 transitions, 1052 flow [2022-12-13 17:31:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:31:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:31:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3601 transitions. [2022-12-13 17:31:44,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3951064296686416 [2022-12-13 17:31:44,582 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3601 transitions. [2022-12-13 17:31:44,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3601 transitions. [2022-12-13 17:31:44,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:44,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3601 transitions. [2022-12-13 17:31:44,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 514.4285714285714) internal successors, (3601), 7 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:44,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1302.0) internal successors, (10416), 8 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:44,589 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1302.0) internal successors, (10416), 8 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:44,589 INFO L175 Difference]: Start difference. First operand has 101 places, 84 transitions, 662 flow. Second operand 7 states and 3601 transitions. [2022-12-13 17:31:44,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 120 transitions, 1052 flow [2022-12-13 17:31:44,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 120 transitions, 1052 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:31:44,621 INFO L231 Difference]: Finished difference. Result has 109 places, 87 transitions, 742 flow [2022-12-13 17:31:44,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=742, PETRI_PLACES=109, PETRI_TRANSITIONS=87} [2022-12-13 17:31:44,622 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 35 predicate places. [2022-12-13 17:31:44,622 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 87 transitions, 742 flow [2022-12-13 17:31:44,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 507.55555555555554) internal successors, (4568), 9 states have internal predecessors, (4568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:44,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:44,623 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:44,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 17:31:44,623 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:44,623 INFO L85 PathProgramCache]: Analyzing trace with hash -166650237, now seen corresponding path program 1 times [2022-12-13 17:31:44,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:44,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410890989] [2022-12-13 17:31:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:44,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 17:31:44,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410890989] [2022-12-13 17:31:44,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410890989] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:44,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:44,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:31:44,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827784985] [2022-12-13 17:31:44,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:44,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:31:44,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:44,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:31:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:31:44,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 522 out of 1302 [2022-12-13 17:31:44,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 87 transitions, 742 flow. Second operand has 4 states, 4 states have (on average 528.0) internal successors, (2112), 4 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:44,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:44,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 522 of 1302 [2022-12-13 17:31:44,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:46,910 INFO L130 PetriNetUnfolder]: 6327/10375 cut-off events. [2022-12-13 17:31:46,910 INFO L131 PetriNetUnfolder]: For 25647/25647 co-relation queries the response was YES. [2022-12-13 17:31:46,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39699 conditions, 10375 events. 6327/10375 cut-off events. For 25647/25647 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 57687 event pairs, 3000 based on Foata normal form. 182/10427 useless extension candidates. Maximal degree in co-relation 39660. Up to 6801 conditions per place. [2022-12-13 17:31:46,960 INFO L137 encePairwiseOnDemand]: 1295/1302 looper letters, 97 selfloop transitions, 22 changer transitions 9/128 dead transitions. [2022-12-13 17:31:46,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 128 transitions, 1299 flow [2022-12-13 17:31:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:31:46,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:31:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2145 transitions. [2022-12-13 17:31:46,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4118663594470046 [2022-12-13 17:31:46,963 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2145 transitions. [2022-12-13 17:31:46,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2145 transitions. [2022-12-13 17:31:46,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:46,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2145 transitions. [2022-12-13 17:31:46,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 536.25) internal successors, (2145), 4 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:46,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1302.0) internal successors, (6510), 5 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:46,968 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1302.0) internal successors, (6510), 5 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:46,968 INFO L175 Difference]: Start difference. First operand has 109 places, 87 transitions, 742 flow. Second operand 4 states and 2145 transitions. [2022-12-13 17:31:46,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 128 transitions, 1299 flow [2022-12-13 17:31:47,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 128 transitions, 1296 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:31:47,066 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 1005 flow [2022-12-13 17:31:47,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1005, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2022-12-13 17:31:47,066 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2022-12-13 17:31:47,066 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 1005 flow [2022-12-13 17:31:47,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 528.0) internal successors, (2112), 4 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:47,067 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:47,067 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:47,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 17:31:47,067 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:31:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:47,067 INFO L85 PathProgramCache]: Analyzing trace with hash -702801246, now seen corresponding path program 1 times [2022-12-13 17:31:47,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:47,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332572083] [2022-12-13 17:31:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:47,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:31:48,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:48,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332572083] [2022-12-13 17:31:48,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332572083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:31:48,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674773392] [2022-12-13 17:31:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:48,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:48,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:31:48,381 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:31:48,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 17:31:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:48,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 17:31:48,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:31:49,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:31:49,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 360 treesize of output 308 [2022-12-13 17:31:49,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:31:49,116 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 134 treesize of output 136 [2022-12-13 17:31:49,132 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 17:31:49,132 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 130 treesize of output 124 [2022-12-13 17:31:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:31:49,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:31:51,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:31:51,971 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 254 treesize of output 252 [2022-12-13 17:31:51,979 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 17:31:51,979 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 244 treesize of output 234 [2022-12-13 17:31:53,247 INFO L321 Elim1Store]: treesize reduction 65, result has 70.6 percent of original size [2022-12-13 17:31:53,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 240 [2022-12-13 17:32:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:32:45,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674773392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:32:45,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:32:45,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 29 [2022-12-13 17:32:45,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905727013] [2022-12-13 17:32:45,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:32:45,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 17:32:45,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:32:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 17:32:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:32:51,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 438 out of 1302 [2022-12-13 17:32:51,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 100 transitions, 1005 flow. Second operand has 30 states, 30 states have (on average 440.3333333333333) internal successors, (13210), 30 states have internal predecessors, (13210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:32:51,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:32:51,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 438 of 1302 [2022-12-13 17:32:51,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:33:20,947 INFO L130 PetriNetUnfolder]: 11141/18359 cut-off events. [2022-12-13 17:33:20,948 INFO L131 PetriNetUnfolder]: For 55178/55178 co-relation queries the response was YES. [2022-12-13 17:33:21,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71944 conditions, 18359 events. 11141/18359 cut-off events. For 55178/55178 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 115766 event pairs, 2218 based on Foata normal form. 18/18377 useless extension candidates. Maximal degree in co-relation 71904. Up to 6865 conditions per place. [2022-12-13 17:33:21,070 INFO L137 encePairwiseOnDemand]: 1281/1302 looper letters, 359 selfloop transitions, 355 changer transitions 62/776 dead transitions. [2022-12-13 17:33:21,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 776 transitions, 6887 flow [2022-12-13 17:33:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-12-13 17:33:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-12-13 17:33:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 36067 transitions. [2022-12-13 17:33:21,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3419904799833115 [2022-12-13 17:33:21,095 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 36067 transitions. [2022-12-13 17:33:21,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 36067 transitions. [2022-12-13 17:33:21,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:33:21,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 36067 transitions. [2022-12-13 17:33:21,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 445.2716049382716) internal successors, (36067), 81 states have internal predecessors, (36067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:21,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 1302.0) internal successors, (106764), 82 states have internal predecessors, (106764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:21,205 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 1302.0) internal successors, (106764), 82 states have internal predecessors, (106764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:21,205 INFO L175 Difference]: Start difference. First operand has 113 places, 100 transitions, 1005 flow. Second operand 81 states and 36067 transitions. [2022-12-13 17:33:21,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 776 transitions, 6887 flow [2022-12-13 17:33:21,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 776 transitions, 6855 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-12-13 17:33:21,367 INFO L231 Difference]: Finished difference. Result has 225 places, 445 transitions, 5086 flow [2022-12-13 17:33:21,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=5086, PETRI_PLACES=225, PETRI_TRANSITIONS=445} [2022-12-13 17:33:21,367 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 151 predicate places. [2022-12-13 17:33:21,368 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 445 transitions, 5086 flow [2022-12-13 17:33:21,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 440.3333333333333) internal successors, (13210), 30 states have internal predecessors, (13210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:21,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:21,369 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:33:21,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 17:33:21,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:21,570 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:33:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:21,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2076914146, now seen corresponding path program 2 times [2022-12-13 17:33:21,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:21,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881992114] [2022-12-13 17:33:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:21,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:33:23,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:23,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881992114] [2022-12-13 17:33:23,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881992114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:33:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497630475] [2022-12-13 17:33:23,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:33:23,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:23,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:33:23,337 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:33:23,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 17:33:23,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:33:23,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:33:23,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 17:33:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:33:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:33:24,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:33:26,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:33:26,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 527 treesize of output 505 [2022-12-13 17:33:26,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:33:26,762 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 327 treesize of output 325 [2022-12-13 17:33:26,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:33:26,796 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 214 treesize of output 216 [2022-12-13 17:33:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:33:34,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497630475] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:33:34,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:33:34,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 31 [2022-12-13 17:33:34,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378737541] [2022-12-13 17:33:34,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:33:34,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 17:33:34,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:33:34,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 17:33:34,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-12-13 17:33:42,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 429 out of 1302 [2022-12-13 17:33:42,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 445 transitions, 5086 flow. Second operand has 32 states, 32 states have (on average 430.96875) internal successors, (13791), 32 states have internal predecessors, (13791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:42,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:33:42,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 429 of 1302 [2022-12-13 17:33:42,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:33:57,734 INFO L130 PetriNetUnfolder]: 14420/24674 cut-off events. [2022-12-13 17:33:57,734 INFO L131 PetriNetUnfolder]: For 416133/416133 co-relation queries the response was YES. [2022-12-13 17:33:57,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172552 conditions, 24674 events. 14420/24674 cut-off events. For 416133/416133 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 172548 event pairs, 3546 based on Foata normal form. 12/24686 useless extension candidates. Maximal degree in co-relation 172478. Up to 12929 conditions per place. [2022-12-13 17:33:57,940 INFO L137 encePairwiseOnDemand]: 1279/1302 looper letters, 393 selfloop transitions, 644 changer transitions 28/1065 dead transitions. [2022-12-13 17:33:57,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 1065 transitions, 14889 flow [2022-12-13 17:33:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 17:33:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-13 17:33:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 21843 transitions. [2022-12-13 17:33:57,955 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3355299539170507 [2022-12-13 17:33:57,955 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 21843 transitions. [2022-12-13 17:33:57,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 21843 transitions. [2022-12-13 17:33:57,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:33:57,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 21843 transitions. [2022-12-13 17:33:57,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 436.86) internal successors, (21843), 50 states have internal predecessors, (21843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:58,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 1302.0) internal successors, (66402), 51 states have internal predecessors, (66402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:58,006 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 1302.0) internal successors, (66402), 51 states have internal predecessors, (66402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:58,006 INFO L175 Difference]: Start difference. First operand has 225 places, 445 transitions, 5086 flow. Second operand 50 states and 21843 transitions. [2022-12-13 17:33:58,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 1065 transitions, 14889 flow [2022-12-13 17:34:00,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1065 transitions, 13950 flow, removed 412 selfloop flow, removed 9 redundant places. [2022-12-13 17:34:00,612 INFO L231 Difference]: Finished difference. Result has 281 places, 844 transitions, 12564 flow [2022-12-13 17:34:00,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1302, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=12564, PETRI_PLACES=281, PETRI_TRANSITIONS=844} [2022-12-13 17:34:00,612 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 207 predicate places. [2022-12-13 17:34:00,613 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 844 transitions, 12564 flow [2022-12-13 17:34:00,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 430.96875) internal successors, (13791), 32 states have internal predecessors, (13791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:00,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:00,614 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:00,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 17:34:00,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:00,815 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-12-13 17:34:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:00,816 INFO L85 PathProgramCache]: Analyzing trace with hash -893391086, now seen corresponding path program 3 times [2022-12-13 17:34:00,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:00,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396966978] [2022-12-13 17:34:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:00,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:34:02,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396966978] [2022-12-13 17:34:02,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396966978] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160151534] [2022-12-13 17:34:02,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:34:02,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:02,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:02,414 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:02,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d11422-96a0-4491-a417-008ff36c6b8f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 17:34:02,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:34:02,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:02,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 17:34:02,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:03,314 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:34:03,314 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 64 treesize of output 68 [2022-12-13 17:34:03,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:34:03,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 79 [2022-12-13 17:34:03,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:34:03,335 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 50 treesize of output 54 [2022-12-13 17:34:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 17:34:03,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:04,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:34:04,871 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 372 treesize of output 370 [2022-12-13 17:34:04,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:34:04,894 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 234 treesize of output 236 [2022-12-13 17:34:08,118 INFO L321 Elim1Store]: treesize reduction 169, result has 63.3 percent of original size [2022-12-13 17:34:08,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 146 treesize of output 383