./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:36,805 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:36,905 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:37:36,910 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:36,911 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:36,940 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:36,941 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:36,941 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:36,942 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:36,943 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:36,944 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:36,944 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:36,945 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:36,946 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:36,946 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:36,947 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:36,948 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:36,948 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:36,949 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:37:36,950 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:37:36,956 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:37:36,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:36,958 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:37:36,958 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:37:36,959 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:36,959 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:36,960 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:36,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:36,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:36,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:36,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:36,963 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:36,964 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:36,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:36,964 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:36,965 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:36,965 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:36,965 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:36,966 INFO L153 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_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f [2023-11-19 07:37:37,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:37,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:37,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:37,272 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:37,273 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:37,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-19 07:37:40,475 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:40,747 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:40,748 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-19 07:37:40,759 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/data/3c8cd1a1f/23eeeca9bc674ca0b4f6acae296eed0f/FLAGb7d108201 [2023-11-19 07:37:40,778 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/data/3c8cd1a1f/23eeeca9bc674ca0b4f6acae296eed0f [2023-11-19 07:37:40,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:40,790 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:40,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:40,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:40,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:40,802 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:40" (1/1) ... [2023-11-19 07:37:40,804 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f038045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:40, skipping insertion in model container [2023-11-19 07:37:40,804 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:40" (1/1) ... [2023-11-19 07:37:40,838 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:41,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:41,087 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:41,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:41,132 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:37:41,134 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:37:41,142 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:41,143 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41 WrapperNode [2023-11-19 07:37:41,143 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:41,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:41,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:41,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:41,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,214 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2023-11-19 07:37:41,215 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:41,216 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:41,217 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:41,217 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:41,227 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,237 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,238 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,244 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,254 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,256 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,257 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:41,262 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:41,262 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:41,262 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:41,263 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:41,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:41,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:41,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:41,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:41,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:37:41,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:37:41,345 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:37:41,345 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:37:41,345 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:37:41,345 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:37:41,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:37:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:37:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:37:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:37:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:41,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:41,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:37:41,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:37:41,351 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:37:41,494 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:41,497 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:41,841 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:41,918 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:41,918 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:37:41,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:41 BoogieIcfgContainer [2023-11-19 07:37:41,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:41,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:41,929 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:41,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:41,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:40" (1/3) ... [2023-11-19 07:37:41,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d5222f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:41, skipping insertion in model container [2023-11-19 07:37:41,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (2/3) ... [2023-11-19 07:37:41,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d5222f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:41, skipping insertion in model container [2023-11-19 07:37:41,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:41" (3/3) ... [2023-11-19 07:37:41,934 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-11-19 07:37:41,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:41,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-19 07:37:41,949 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:37:42,029 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:37:42,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 133 transitions, 287 flow [2023-11-19 07:37:42,151 INFO L124 PetriNetUnfolderBase]: 7/130 cut-off events. [2023-11-19 07:37:42,154 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:37:42,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 130 events. 7/130 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-11-19 07:37:42,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 133 transitions, 287 flow [2023-11-19 07:37:42,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 125 transitions, 268 flow [2023-11-19 07:37:42,172 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:37:42,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 125 transitions, 268 flow [2023-11-19 07:37:42,186 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 125 transitions, 268 flow [2023-11-19 07:37:42,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 125 transitions, 268 flow [2023-11-19 07:37:42,243 INFO L124 PetriNetUnfolderBase]: 7/125 cut-off events. [2023-11-19 07:37:42,243 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:37:42,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 7/125 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 141 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-11-19 07:37:42,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 1980 [2023-11-19 07:37:46,946 INFO L134 LiptonReduction]: Checked pairs total: 2993 [2023-11-19 07:37:46,947 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-11-19 07:37:46,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:46,982 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;@266689a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:46,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-19 07:37:46,989 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:37:46,989 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:37:46,989 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:46,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:46,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:37:46,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:46,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:46,996 INFO L85 PathProgramCache]: Analyzing trace with hash 565, now seen corresponding path program 1 times [2023-11-19 07:37:47,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:47,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964755791] [2023-11-19 07:37:47,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:47,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:47,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:47,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964755791] [2023-11-19 07:37:47,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964755791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:47,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:47,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:37:47,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986591792] [2023-11-19 07:37:47,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:47,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:37:47,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:47,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:37:47,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:47,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-11-19 07:37:47,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 88 flow. Second operand has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:47,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-11-19 07:37:47,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:47,320 INFO L124 PetriNetUnfolderBase]: 402/653 cut-off events. [2023-11-19 07:37:47,320 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-19 07:37:47,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 653 events. 402/653 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2475 event pairs, 377 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 1145. Up to 629 conditions per place. [2023-11-19 07:37:47,331 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 30 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-11-19 07:37:47,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 142 flow [2023-11-19 07:37:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:37:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:37:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 271 transitions. [2023-11-19 07:37:47,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334645669291339 [2023-11-19 07:37:47,356 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 271 transitions. [2023-11-19 07:37:47,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 271 transitions. [2023-11-19 07:37:47,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:47,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 271 transitions. [2023-11-19 07:37:47,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,370 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,372 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 88 flow. Second operand 2 states and 271 transitions. [2023-11-19 07:37:47,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 142 flow [2023-11-19 07:37:47,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:37:47,380 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 70 flow [2023-11-19 07:37:47,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-19 07:37:47,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-11-19 07:37:47,387 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 70 flow [2023-11-19 07:37:47,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:47,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:37:47,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:37:47,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:47,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:47,389 INFO L85 PathProgramCache]: Analyzing trace with hash 558111, now seen corresponding path program 1 times [2023-11-19 07:37:47,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:47,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131772240] [2023-11-19 07:37:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:47,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:47,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:47,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131772240] [2023-11-19 07:37:47,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131772240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:47,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:47,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:37:47,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557814236] [2023-11-19 07:37:47,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:47,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:47,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:47,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:47,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:47,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-11-19 07:37:47,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:47,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-11-19 07:37:47,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:47,833 INFO L124 PetriNetUnfolderBase]: 388/627 cut-off events. [2023-11-19 07:37:47,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:47,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 627 events. 388/627 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2335 event pairs, 364 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 1251. Up to 603 conditions per place. [2023-11-19 07:37:47,840 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-11-19 07:37:47,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 122 flow [2023-11-19 07:37:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-11-19 07:37:47,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645669291338583 [2023-11-19 07:37:47,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-11-19 07:37:47,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-11-19 07:37:47,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:47,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-11-19 07:37:47,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,850 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 70 flow. Second operand 3 states and 354 transitions. [2023-11-19 07:37:47,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 122 flow [2023-11-19 07:37:47,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:37:47,852 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 68 flow [2023-11-19 07:37:47,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-19 07:37:47,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-11-19 07:37:47,853 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 68 flow [2023-11-19 07:37:47,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:47,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:37:47,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:37:47,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:47,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:47,863 INFO L85 PathProgramCache]: Analyzing trace with hash 558109, now seen corresponding path program 1 times [2023-11-19 07:37:47,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:47,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474733670] [2023-11-19 07:37:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:47,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:48,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:48,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474733670] [2023-11-19 07:37:48,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474733670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:48,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:48,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:37:48,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46340306] [2023-11-19 07:37:48,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:48,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:48,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:48,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:48,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:48,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 254 [2023-11-19 07:37:48,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:48,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 254 [2023-11-19 07:37:48,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:48,281 INFO L124 PetriNetUnfolderBase]: 374/601 cut-off events. [2023-11-19 07:37:48,282 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:48,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 601 events. 374/601 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2229 event pairs, 351 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 1201. Up to 578 conditions per place. [2023-11-19 07:37:48,287 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-19 07:37:48,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 116 flow [2023-11-19 07:37:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-11-19 07:37:48,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816272965879265 [2023-11-19 07:37:48,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-11-19 07:37:48,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-11-19 07:37:48,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:48,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-11-19 07:37:48,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,296 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 68 flow. Second operand 3 states and 367 transitions. [2023-11-19 07:37:48,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 116 flow [2023-11-19 07:37:48,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:48,298 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 65 flow [2023-11-19 07:37:48,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-19 07:37:48,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -9 predicate places. [2023-11-19 07:37:48,299 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 65 flow [2023-11-19 07:37:48,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:48,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:37:48,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:37:48,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:48,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:48,301 INFO L85 PathProgramCache]: Analyzing trace with hash 536356876, now seen corresponding path program 1 times [2023-11-19 07:37:48,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:48,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134957564] [2023-11-19 07:37:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:48,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:48,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:48,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134957564] [2023-11-19 07:37:48,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134957564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:48,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:48,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:37:48,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569588246] [2023-11-19 07:37:48,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:48,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:48,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:48,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:48,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-11-19 07:37:48,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:48,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-11-19 07:37:48,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:48,501 INFO L124 PetriNetUnfolderBase]: 345/554 cut-off events. [2023-11-19 07:37:48,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:48,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1116 conditions, 554 events. 345/554 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2018 event pairs, 326 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1112. Up to 535 conditions per place. [2023-11-19 07:37:48,507 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-19 07:37:48,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 109 flow [2023-11-19 07:37:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-11-19 07:37:48,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45931758530183725 [2023-11-19 07:37:48,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-11-19 07:37:48,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-11-19 07:37:48,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:48,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-11-19 07:37:48,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,515 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 65 flow. Second operand 3 states and 350 transitions. [2023-11-19 07:37:48,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 109 flow [2023-11-19 07:37:48,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:48,517 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 62 flow [2023-11-19 07:37:48,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-11-19 07:37:48,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -10 predicate places. [2023-11-19 07:37:48,518 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 62 flow [2023-11-19 07:37:48,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:48,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:37:48,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:37:48,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:48,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:48,520 INFO L85 PathProgramCache]: Analyzing trace with hash 536356877, now seen corresponding path program 1 times [2023-11-19 07:37:48,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:48,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630354635] [2023-11-19 07:37:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:48,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:48,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:48,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630354635] [2023-11-19 07:37:48,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630354635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:48,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:48,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:37:48,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620064579] [2023-11-19 07:37:48,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:48,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:48,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:48,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:48,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:48,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 254 [2023-11-19 07:37:48,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:48,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 254 [2023-11-19 07:37:48,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:48,792 INFO L124 PetriNetUnfolderBase]: 316/507 cut-off events. [2023-11-19 07:37:48,792 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:48,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 507 events. 316/507 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1801 event pairs, 301 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 1023. Up to 492 conditions per place. [2023-11-19 07:37:48,798 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 21 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-19 07:37:48,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 102 flow [2023-11-19 07:37:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-11-19 07:37:48,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4763779527559055 [2023-11-19 07:37:48,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-11-19 07:37:48,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-11-19 07:37:48,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:48,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-11-19 07:37:48,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,806 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 62 flow. Second operand 3 states and 363 transitions. [2023-11-19 07:37:48,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 102 flow [2023-11-19 07:37:48,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:48,807 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 59 flow [2023-11-19 07:37:48,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-19 07:37:48,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-11-19 07:37:48,809 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 59 flow [2023-11-19 07:37:48,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:48,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:48,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:37:48,810 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:48,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:48,810 INFO L85 PathProgramCache]: Analyzing trace with hash 42897493, now seen corresponding path program 1 times [2023-11-19 07:37:48,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:48,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225471560] [2023-11-19 07:37:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:48,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:48,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:48,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225471560] [2023-11-19 07:37:48,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225471560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:48,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:48,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:37:48,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296480633] [2023-11-19 07:37:48,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:48,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:48,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:48,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:48,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 254 [2023-11-19 07:37:48,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:48,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 254 [2023-11-19 07:37:48,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:48,986 INFO L124 PetriNetUnfolderBase]: 252/411 cut-off events. [2023-11-19 07:37:48,987 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:48,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836 conditions, 411 events. 252/411 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1376 event pairs, 237 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 832. Up to 396 conditions per place. [2023-11-19 07:37:48,991 INFO L140 encePairwiseOnDemand]: 252/254 looper letters, 20 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-19 07:37:48,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 23 transitions, 99 flow [2023-11-19 07:37:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-11-19 07:37:48,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458005249343832 [2023-11-19 07:37:48,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-11-19 07:37:48,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-11-19 07:37:48,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:48,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-11-19 07:37:48,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:48,999 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 59 flow. Second operand 3 states and 349 transitions. [2023-11-19 07:37:48,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 23 transitions, 99 flow [2023-11-19 07:37:49,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:49,001 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 58 flow [2023-11-19 07:37:49,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-11-19 07:37:49,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-11-19 07:37:49,002 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 58 flow [2023-11-19 07:37:49,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:49,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:49,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:37:49,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:49,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:49,004 INFO L85 PathProgramCache]: Analyzing trace with hash 42897494, now seen corresponding path program 1 times [2023-11-19 07:37:49,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:49,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909853971] [2023-11-19 07:37:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:49,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:49,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:49,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909853971] [2023-11-19 07:37:49,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909853971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:49,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:49,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:49,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654476755] [2023-11-19 07:37:49,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:49,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:37:49,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:49,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:37:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:37:49,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-11-19 07:37:49,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 101.4) internal successors, (507), 5 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:49,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-11-19 07:37:49,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:49,289 INFO L124 PetriNetUnfolderBase]: 188/315 cut-off events. [2023-11-19 07:37:49,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:49,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 315 events. 188/315 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 976 event pairs, 173 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 641. Up to 300 conditions per place. [2023-11-19 07:37:49,292 INFO L140 encePairwiseOnDemand]: 252/254 looper letters, 19 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-19 07:37:49,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 96 flow [2023-11-19 07:37:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-11-19 07:37:49,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421259842519685 [2023-11-19 07:37:49,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-11-19 07:37:49,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-11-19 07:37:49,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:49,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-11-19 07:37:49,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,300 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 58 flow. Second operand 3 states and 321 transitions. [2023-11-19 07:37:49,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 96 flow [2023-11-19 07:37:49,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:49,302 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 57 flow [2023-11-19 07:37:49,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-11-19 07:37:49,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-11-19 07:37:49,303 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 57 flow [2023-11-19 07:37:49,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.4) internal successors, (507), 5 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:49,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:49,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:37:49,305 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:49,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:49,305 INFO L85 PathProgramCache]: Analyzing trace with hash -312433962, now seen corresponding path program 1 times [2023-11-19 07:37:49,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:49,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546320958] [2023-11-19 07:37:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:49,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:49,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:49,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546320958] [2023-11-19 07:37:49,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546320958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:49,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:49,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:49,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417930575] [2023-11-19 07:37:49,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:49,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:37:49,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:37:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:49,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 254 [2023-11-19 07:37:49,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:49,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 254 [2023-11-19 07:37:49,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:49,609 INFO L124 PetriNetUnfolderBase]: 152/251 cut-off events. [2023-11-19 07:37:49,609 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:49,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 251 events. 152/251 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 768 event pairs, 9 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 521. Up to 115 conditions per place. [2023-11-19 07:37:49,612 INFO L140 encePairwiseOnDemand]: 250/254 looper letters, 33 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-11-19 07:37:49,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 165 flow [2023-11-19 07:37:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:37:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:37:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-11-19 07:37:49,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4822834645669291 [2023-11-19 07:37:49,615 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-11-19 07:37:49,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-11-19 07:37:49,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:49,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-11-19 07:37:49,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,620 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,620 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 57 flow. Second operand 4 states and 490 transitions. [2023-11-19 07:37:49,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 165 flow [2023-11-19 07:37:49,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:37:49,623 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 74 flow [2023-11-19 07:37:49,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-11-19 07:37:49,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-11-19 07:37:49,628 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 74 flow [2023-11-19 07:37:49,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:49,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:49,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:37:49,629 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:49,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:49,629 INFO L85 PathProgramCache]: Analyzing trace with hash 255758018, now seen corresponding path program 2 times [2023-11-19 07:37:49,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:49,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692056945] [2023-11-19 07:37:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:49,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:49,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:49,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692056945] [2023-11-19 07:37:49,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692056945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:49,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:49,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:49,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130253131] [2023-11-19 07:37:49,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:49,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:37:49,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:37:49,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:49,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 254 [2023-11-19 07:37:49,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:49,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 254 [2023-11-19 07:37:49,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:50,002 INFO L124 PetriNetUnfolderBase]: 125/212 cut-off events. [2023-11-19 07:37:50,003 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-11-19 07:37:50,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 212 events. 125/212 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 573 event pairs, 14 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 503. Up to 111 conditions per place. [2023-11-19 07:37:50,005 INFO L140 encePairwiseOnDemand]: 250/254 looper letters, 29 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2023-11-19 07:37:50,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 177 flow [2023-11-19 07:37:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:37:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:37:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-11-19 07:37:50,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47834645669291337 [2023-11-19 07:37:50,008 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-11-19 07:37:50,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-11-19 07:37:50,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:50,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-11-19 07:37:50,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,013 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,014 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 74 flow. Second operand 4 states and 486 transitions. [2023-11-19 07:37:50,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 177 flow [2023-11-19 07:37:50,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:50,018 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 102 flow [2023-11-19 07:37:50,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-11-19 07:37:50,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-11-19 07:37:50,020 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 102 flow [2023-11-19 07:37:50,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:50,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:50,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:37:50,021 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:50,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1255315476, now seen corresponding path program 3 times [2023-11-19 07:37:50,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932203509] [2023-11-19 07:37:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:50,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:50,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:50,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932203509] [2023-11-19 07:37:50,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932203509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:50,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:50,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:37:50,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456650241] [2023-11-19 07:37:50,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:50,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:37:50,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:50,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:37:50,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:37:50,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 254 [2023-11-19 07:37:50,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:50,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 254 [2023-11-19 07:37:50,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:50,409 INFO L124 PetriNetUnfolderBase]: 135/230 cut-off events. [2023-11-19 07:37:50,409 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-19 07:37:50,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 230 events. 135/230 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 676 event pairs, 12 based on Foata normal form. 8/238 useless extension candidates. Maximal degree in co-relation 606. Up to 80 conditions per place. [2023-11-19 07:37:50,412 INFO L140 encePairwiseOnDemand]: 248/254 looper letters, 34 selfloop transitions, 8 changer transitions 0/43 dead transitions. [2023-11-19 07:37:50,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 43 transitions, 228 flow [2023-11-19 07:37:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:37:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:37:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 601 transitions. [2023-11-19 07:37:50,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732283464566929 [2023-11-19 07:37:50,416 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 601 transitions. [2023-11-19 07:37:50,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 601 transitions. [2023-11-19 07:37:50,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:50,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 601 transitions. [2023-11-19 07:37:50,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,422 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,422 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 102 flow. Second operand 5 states and 601 transitions. [2023-11-19 07:37:50,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 43 transitions, 228 flow [2023-11-19 07:37:50,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:50,426 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 132 flow [2023-11-19 07:37:50,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-11-19 07:37:50,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-11-19 07:37:50,428 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 132 flow [2023-11-19 07:37:50,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:50,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:50,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:37:50,431 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:50,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:50,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2122310396, now seen corresponding path program 4 times [2023-11-19 07:37:50,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:50,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323075759] [2023-11-19 07:37:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:50,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:50,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:50,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323075759] [2023-11-19 07:37:50,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323075759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:50,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:50,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:37:50,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415842856] [2023-11-19 07:37:50,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:50,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:37:50,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:50,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:37:50,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:37:50,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 254 [2023-11-19 07:37:50,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:50,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 254 [2023-11-19 07:37:50,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:50,889 INFO L124 PetriNetUnfolderBase]: 247/406 cut-off events. [2023-11-19 07:37:50,889 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2023-11-19 07:37:50,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 406 events. 247/406 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1392 event pairs, 23 based on Foata normal form. 14/420 useless extension candidates. Maximal degree in co-relation 1168. Up to 222 conditions per place. [2023-11-19 07:37:50,893 INFO L140 encePairwiseOnDemand]: 247/254 looper letters, 33 selfloop transitions, 3 changer transitions 28/65 dead transitions. [2023-11-19 07:37:50,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 404 flow [2023-11-19 07:37:50,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:37:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:37:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 834 transitions. [2023-11-19 07:37:50,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46906636670416196 [2023-11-19 07:37:50,897 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 834 transitions. [2023-11-19 07:37:50,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 834 transitions. [2023-11-19 07:37:50,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:50,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 834 transitions. [2023-11-19 07:37:50,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.14285714285714) internal successors, (834), 7 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,906 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,906 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 132 flow. Second operand 7 states and 834 transitions. [2023-11-19 07:37:50,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 404 flow [2023-11-19 07:37:50,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:37:50,911 INFO L231 Difference]: Finished difference. Result has 53 places, 30 transitions, 161 flow [2023-11-19 07:37:50,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=53, PETRI_TRANSITIONS=30} [2023-11-19 07:37:50,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-11-19 07:37:50,912 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 30 transitions, 161 flow [2023-11-19 07:37:50,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:50,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:50,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:37:50,913 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:50,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash 547521747, now seen corresponding path program 1 times [2023-11-19 07:37:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:50,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163990445] [2023-11-19 07:37:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:50,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:51,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163990445] [2023-11-19 07:37:51,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163990445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381868464] [2023-11-19 07:37:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:51,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:51,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:51,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:51,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:37:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:51,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:37:51,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:51,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:51,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381868464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:51,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:51,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 07:37:51,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243764018] [2023-11-19 07:37:51,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:51,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:37:51,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:51,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:37:51,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:37:51,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-11-19 07:37:51,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 30 transitions, 161 flow. Second operand has 12 states, 12 states have (on average 111.25) internal successors, (1335), 12 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:51,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:51,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-11-19 07:37:51,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:52,489 INFO L124 PetriNetUnfolderBase]: 420/711 cut-off events. [2023-11-19 07:37:52,489 INFO L125 PetriNetUnfolderBase]: For 1462/1462 co-relation queries the response was YES. [2023-11-19 07:37:52,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2649 conditions, 711 events. 420/711 cut-off events. For 1462/1462 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2955 event pairs, 15 based on Foata normal form. 20/731 useless extension candidates. Maximal degree in co-relation 2634. Up to 219 conditions per place. [2023-11-19 07:37:52,497 INFO L140 encePairwiseOnDemand]: 247/254 looper letters, 104 selfloop transitions, 44 changer transitions 6/155 dead transitions. [2023-11-19 07:37:52,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 155 transitions, 1081 flow [2023-11-19 07:37:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:37:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:37:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2422 transitions. [2023-11-19 07:37:52,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540682414698163 [2023-11-19 07:37:52,507 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2422 transitions. [2023-11-19 07:37:52,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2422 transitions. [2023-11-19 07:37:52,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:52,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2422 transitions. [2023-11-19 07:37:52,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 115.33333333333333) internal successors, (2422), 21 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:52,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 254.0) internal successors, (5588), 22 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:52,529 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 254.0) internal successors, (5588), 22 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:52,529 INFO L175 Difference]: Start difference. First operand has 53 places, 30 transitions, 161 flow. Second operand 21 states and 2422 transitions. [2023-11-19 07:37:52,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 155 transitions, 1081 flow [2023-11-19 07:37:52,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 155 transitions, 1051 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-11-19 07:37:52,537 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 625 flow [2023-11-19 07:37:52,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=625, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-11-19 07:37:52,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2023-11-19 07:37:52,538 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 625 flow [2023-11-19 07:37:52,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.25) internal successors, (1335), 12 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:52,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:52,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:52,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:37:52,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:52,759 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:52,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1650902034, now seen corresponding path program 1 times [2023-11-19 07:37:52,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:52,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869669429] [2023-11-19 07:37:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:52,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:53,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:53,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869669429] [2023-11-19 07:37:53,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869669429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:53,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489138303] [2023-11-19 07:37:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:53,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:53,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:53,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:53,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:37:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:53,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:37:53,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:53,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:53,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489138303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:53,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:53,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 07:37:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667460802] [2023-11-19 07:37:53,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:53,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:37:53,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:53,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:37:53,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:37:53,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-11-19 07:37:53,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 625 flow. Second operand has 12 states, 12 states have (on average 111.16666666666667) internal successors, (1334), 12 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:53,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:53,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-11-19 07:37:53,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:54,346 INFO L124 PetriNetUnfolderBase]: 704/1183 cut-off events. [2023-11-19 07:37:54,346 INFO L125 PetriNetUnfolderBase]: For 4509/4535 co-relation queries the response was YES. [2023-11-19 07:37:54,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5186 conditions, 1183 events. 704/1183 cut-off events. For 4509/4535 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5552 event pairs, 23 based on Foata normal form. 132/1297 useless extension candidates. Maximal degree in co-relation 5170. Up to 433 conditions per place. [2023-11-19 07:37:54,356 INFO L140 encePairwiseOnDemand]: 247/254 looper letters, 68 selfloop transitions, 25 changer transitions 134/229 dead transitions. [2023-11-19 07:37:54,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 229 transitions, 2134 flow [2023-11-19 07:37:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:37:54,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:37:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2421 transitions. [2023-11-19 07:37:54,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45388076490438695 [2023-11-19 07:37:54,367 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2421 transitions. [2023-11-19 07:37:54,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2421 transitions. [2023-11-19 07:37:54,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:54,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2421 transitions. [2023-11-19 07:37:54,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 115.28571428571429) internal successors, (2421), 21 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:54,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 254.0) internal successors, (5588), 22 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:54,389 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 254.0) internal successors, (5588), 22 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:54,390 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 625 flow. Second operand 21 states and 2421 transitions. [2023-11-19 07:37:54,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 229 transitions, 2134 flow [2023-11-19 07:37:54,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 229 transitions, 1576 flow, removed 246 selfloop flow, removed 5 redundant places. [2023-11-19 07:37:54,423 INFO L231 Difference]: Finished difference. Result has 95 places, 56 transitions, 387 flow [2023-11-19 07:37:54,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=387, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2023-11-19 07:37:54,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2023-11-19 07:37:54,425 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 387 flow [2023-11-19 07:37:54,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.16666666666667) internal successors, (1334), 12 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:54,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:54,426 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:54,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:54,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:37:54,639 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:54,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash -384828075, now seen corresponding path program 2 times [2023-11-19 07:37:54,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:54,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268622102] [2023-11-19 07:37:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:54,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:55,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:55,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268622102] [2023-11-19 07:37:55,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268622102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:55,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888794266] [2023-11-19 07:37:55,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:37:55,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:55,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:55,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:55,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:37:55,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:37:55,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:55,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:37:55,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:55,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:56,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888794266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:56,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:56,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 07:37:56,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469595304] [2023-11-19 07:37:56,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:56,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:37:56,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:56,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:37:56,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:37:56,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-11-19 07:37:56,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 56 transitions, 387 flow. Second operand has 18 states, 18 states have (on average 110.66666666666667) internal successors, (1992), 18 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:56,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:56,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-11-19 07:37:56,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:58,074 INFO L124 PetriNetUnfolderBase]: 968/1641 cut-off events. [2023-11-19 07:37:58,074 INFO L125 PetriNetUnfolderBase]: For 9870/9930 co-relation queries the response was YES. [2023-11-19 07:37:58,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7944 conditions, 1641 events. 968/1641 cut-off events. For 9870/9930 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7909 event pairs, 15 based on Foata normal form. 114/1745 useless extension candidates. Maximal degree in co-relation 7918. Up to 411 conditions per place. [2023-11-19 07:37:58,094 INFO L140 encePairwiseOnDemand]: 247/254 looper letters, 149 selfloop transitions, 65 changer transitions 111/327 dead transitions. [2023-11-19 07:37:58,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 327 transitions, 3022 flow [2023-11-19 07:37:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 07:37:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-19 07:37:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4496 transitions. [2023-11-19 07:37:58,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4538663436301232 [2023-11-19 07:37:58,110 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4496 transitions. [2023-11-19 07:37:58,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4496 transitions. [2023-11-19 07:37:58,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:58,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4496 transitions. [2023-11-19 07:37:58,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 115.28205128205128) internal successors, (4496), 39 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:58,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 254.0) internal successors, (10160), 40 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:58,166 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 254.0) internal successors, (10160), 40 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:58,166 INFO L175 Difference]: Start difference. First operand has 95 places, 56 transitions, 387 flow. Second operand 39 states and 4496 transitions. [2023-11-19 07:37:58,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 327 transitions, 3022 flow [2023-11-19 07:37:58,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 327 transitions, 2480 flow, removed 213 selfloop flow, removed 16 redundant places. [2023-11-19 07:37:58,209 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 815 flow [2023-11-19 07:37:58,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=815, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2023-11-19 07:37:58,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2023-11-19 07:37:58,211 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 815 flow [2023-11-19 07:37:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.66666666666667) internal successors, (1992), 18 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:58,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:58,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:58,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 07:37:58,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:37:58,433 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:37:58,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash 283437660, now seen corresponding path program 1 times [2023-11-19 07:37:58,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:58,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262766574] [2023-11-19 07:37:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:58,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:58,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262766574] [2023-11-19 07:37:58,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262766574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558633560] [2023-11-19 07:37:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:58,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:58,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:58,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:58,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:37:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:58,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:37:58,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:59,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:59,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558633560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:59,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:59,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 07:37:59,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771894428] [2023-11-19 07:37:59,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:59,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:37:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:37:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:37:59,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 254 [2023-11-19 07:37:59,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 98 transitions, 815 flow. Second operand has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:59,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:59,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 254 [2023-11-19 07:37:59,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:01,715 INFO L124 PetriNetUnfolderBase]: 1117/1980 cut-off events. [2023-11-19 07:38:01,716 INFO L125 PetriNetUnfolderBase]: For 11337/11361 co-relation queries the response was YES. [2023-11-19 07:38:01,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9445 conditions, 1980 events. 1117/1980 cut-off events. For 11337/11361 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10654 event pairs, 5 based on Foata normal form. 90/2058 useless extension candidates. Maximal degree in co-relation 9422. Up to 447 conditions per place. [2023-11-19 07:38:01,764 INFO L140 encePairwiseOnDemand]: 247/254 looper letters, 155 selfloop transitions, 94 changer transitions 126/379 dead transitions. [2023-11-19 07:38:01,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 379 transitions, 3517 flow [2023-11-19 07:38:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 07:38:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-19 07:38:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4411 transitions. [2023-11-19 07:38:01,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44528568544316577 [2023-11-19 07:38:01,781 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4411 transitions. [2023-11-19 07:38:01,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4411 transitions. [2023-11-19 07:38:01,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:01,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4411 transitions. [2023-11-19 07:38:01,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 113.1025641025641) internal successors, (4411), 39 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:01,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 254.0) internal successors, (10160), 40 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:01,823 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 254.0) internal successors, (10160), 40 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:01,824 INFO L175 Difference]: Start difference. First operand has 104 places, 98 transitions, 815 flow. Second operand 39 states and 4411 transitions. [2023-11-19 07:38:01,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 379 transitions, 3517 flow [2023-11-19 07:38:01,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 379 transitions, 2841 flow, removed 287 selfloop flow, removed 14 redundant places. [2023-11-19 07:38:01,892 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 1250 flow [2023-11-19 07:38:01,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1250, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2023-11-19 07:38:01,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2023-11-19 07:38:01,893 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 1250 flow [2023-11-19 07:38:01,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:01,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:01,894 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:01,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:02,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:02,112 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:02,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:02,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1262545802, now seen corresponding path program 2 times [2023-11-19 07:38:02,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:02,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474052642] [2023-11-19 07:38:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:02,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474052642] [2023-11-19 07:38:02,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474052642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:02,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207888848] [2023-11-19 07:38:02,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:38:02,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:02,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:38:02,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:38:02,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:38:02,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:38:02,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:02,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:03,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207888848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:03,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:03,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 07:38:03,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420369994] [2023-11-19 07:38:03,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:03,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:38:03,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:38:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:38:03,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 254 [2023-11-19 07:38:03,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 138 transitions, 1250 flow. Second operand has 18 states, 18 states have (on average 106.05555555555556) internal successors, (1909), 18 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:03,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 254 [2023-11-19 07:38:03,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:06,331 INFO L124 PetriNetUnfolderBase]: 1787/2888 cut-off events. [2023-11-19 07:38:06,331 INFO L125 PetriNetUnfolderBase]: For 13020/13020 co-relation queries the response was YES. [2023-11-19 07:38:06,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13232 conditions, 2888 events. 1787/2888 cut-off events. For 13020/13020 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14157 event pairs, 61 based on Foata normal form. 144/3032 useless extension candidates. Maximal degree in co-relation 13203. Up to 648 conditions per place. [2023-11-19 07:38:06,368 INFO L140 encePairwiseOnDemand]: 245/254 looper letters, 192 selfloop transitions, 93 changer transitions 187/472 dead transitions. [2023-11-19 07:38:06,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 472 transitions, 4543 flow [2023-11-19 07:38:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-19 07:38:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-19 07:38:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 5600 transitions. [2023-11-19 07:38:06,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322989038134939 [2023-11-19 07:38:06,382 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 5600 transitions. [2023-11-19 07:38:06,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 5600 transitions. [2023-11-19 07:38:06,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:06,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 5600 transitions. [2023-11-19 07:38:06,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 109.80392156862744) internal successors, (5600), 51 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 254.0) internal successors, (13208), 52 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,421 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 254.0) internal successors, (13208), 52 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,421 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 1250 flow. Second operand 51 states and 5600 transitions. [2023-11-19 07:38:06,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 472 transitions, 4543 flow [2023-11-19 07:38:06,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 472 transitions, 4040 flow, removed 134 selfloop flow, removed 22 redundant places. [2023-11-19 07:38:06,560 INFO L231 Difference]: Finished difference. Result has 171 places, 165 transitions, 1682 flow [2023-11-19 07:38:06,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1682, PETRI_PLACES=171, PETRI_TRANSITIONS=165} [2023-11-19 07:38:06,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2023-11-19 07:38:06,560 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 165 transitions, 1682 flow [2023-11-19 07:38:06,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 106.05555555555556) internal successors, (1909), 18 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:06,561 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:06,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:06,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:38:06,779 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:06,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1173943082, now seen corresponding path program 2 times [2023-11-19 07:38:06,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:06,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461783628] [2023-11-19 07:38:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:06,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:07,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:07,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461783628] [2023-11-19 07:38:07,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461783628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:07,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622134215] [2023-11-19 07:38:07,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:38:07,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:07,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:07,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:07,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:38:07,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:38:07,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:38:07,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:38:07,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:07,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:07,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622134215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:07,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:07,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-19 07:38:07,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081782167] [2023-11-19 07:38:07,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:07,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:38:07,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:07,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:38:07,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:38:08,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 254 [2023-11-19 07:38:08,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 165 transitions, 1682 flow. Second operand has 17 states, 17 states have (on average 108.29411764705883) internal successors, (1841), 17 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:08,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:08,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 254 [2023-11-19 07:38:08,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:10,742 INFO L124 PetriNetUnfolderBase]: 2070/3347 cut-off events. [2023-11-19 07:38:10,742 INFO L125 PetriNetUnfolderBase]: For 50329/50329 co-relation queries the response was YES. [2023-11-19 07:38:10,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18981 conditions, 3347 events. 2070/3347 cut-off events. For 50329/50329 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 16817 event pairs, 59 based on Foata normal form. 106/3453 useless extension candidates. Maximal degree in co-relation 18929. Up to 1106 conditions per place. [2023-11-19 07:38:10,783 INFO L140 encePairwiseOnDemand]: 244/254 looper letters, 216 selfloop transitions, 93 changer transitions 169/478 dead transitions. [2023-11-19 07:38:10,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 478 transitions, 5859 flow [2023-11-19 07:38:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-19 07:38:10,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-19 07:38:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5481 transitions. [2023-11-19 07:38:10,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403824521934758 [2023-11-19 07:38:10,800 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5481 transitions. [2023-11-19 07:38:10,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5481 transitions. [2023-11-19 07:38:10,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:10,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5481 transitions. [2023-11-19 07:38:10,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 111.85714285714286) internal successors, (5481), 49 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:10,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 254.0) internal successors, (12700), 50 states have internal predecessors, (12700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:10,838 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 254.0) internal successors, (12700), 50 states have internal predecessors, (12700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:10,839 INFO L175 Difference]: Start difference. First operand has 171 places, 165 transitions, 1682 flow. Second operand 49 states and 5481 transitions. [2023-11-19 07:38:10,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 478 transitions, 5859 flow [2023-11-19 07:38:11,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 478 transitions, 4886 flow, removed 469 selfloop flow, removed 29 redundant places. [2023-11-19 07:38:11,125 INFO L231 Difference]: Finished difference. Result has 191 places, 202 transitions, 2217 flow [2023-11-19 07:38:11,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2217, PETRI_PLACES=191, PETRI_TRANSITIONS=202} [2023-11-19 07:38:11,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2023-11-19 07:38:11,126 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 202 transitions, 2217 flow [2023-11-19 07:38:11,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 108.29411764705883) internal successors, (1841), 17 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:11,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:11,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:11,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:11,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:38:11,354 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:11,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash 979880800, now seen corresponding path program 3 times [2023-11-19 07:38:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:11,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096855956] [2023-11-19 07:38:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:11,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:11,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:11,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096855956] [2023-11-19 07:38:11,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096855956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:11,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045621684] [2023-11-19 07:38:11,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:38:11,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:11,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:11,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:38:11,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:38:11,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:38:11,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:38:11,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:12,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:13,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045621684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:13,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:13,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-19 07:38:13,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476547248] [2023-11-19 07:38:13,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:13,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:38:13,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:38:13,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:38:13,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 254 [2023-11-19 07:38:13,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 202 transitions, 2217 flow. Second operand has 20 states, 20 states have (on average 108.5) internal successors, (2170), 20 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:13,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:13,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 254 [2023-11-19 07:38:13,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:16,734 INFO L124 PetriNetUnfolderBase]: 1978/3497 cut-off events. [2023-11-19 07:38:16,735 INFO L125 PetriNetUnfolderBase]: For 106566/106898 co-relation queries the response was YES. [2023-11-19 07:38:16,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25606 conditions, 3497 events. 1978/3497 cut-off events. For 106566/106898 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21031 event pairs, 47 based on Foata normal form. 214/3683 useless extension candidates. Maximal degree in co-relation 25545. Up to 859 conditions per place. [2023-11-19 07:38:16,778 INFO L140 encePairwiseOnDemand]: 247/254 looper letters, 258 selfloop transitions, 144 changer transitions 146/556 dead transitions. [2023-11-19 07:38:16,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 556 transitions, 8132 flow [2023-11-19 07:38:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-19 07:38:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-19 07:38:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 5854 transitions. [2023-11-19 07:38:16,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432162325863113 [2023-11-19 07:38:16,788 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 5854 transitions. [2023-11-19 07:38:16,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 5854 transitions. [2023-11-19 07:38:16,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:16,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 5854 transitions. [2023-11-19 07:38:16,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 112.57692307692308) internal successors, (5854), 52 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:16,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 254.0) internal successors, (13462), 53 states have internal predecessors, (13462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:16,817 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 254.0) internal successors, (13462), 53 states have internal predecessors, (13462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:16,818 INFO L175 Difference]: Start difference. First operand has 191 places, 202 transitions, 2217 flow. Second operand 52 states and 5854 transitions. [2023-11-19 07:38:16,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 556 transitions, 8132 flow [2023-11-19 07:38:17,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 556 transitions, 6383 flow, removed 857 selfloop flow, removed 32 redundant places. [2023-11-19 07:38:17,176 INFO L231 Difference]: Finished difference. Result has 194 places, 267 transitions, 3174 flow [2023-11-19 07:38:17,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3174, PETRI_PLACES=194, PETRI_TRANSITIONS=267} [2023-11-19 07:38:17,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2023-11-19 07:38:17,178 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 267 transitions, 3174 flow [2023-11-19 07:38:17,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.5) internal successors, (2170), 20 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:17,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:17,179 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:17,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:17,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:38:17,400 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:17,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash -431457144, now seen corresponding path program 4 times [2023-11-19 07:38:17,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:17,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282181389] [2023-11-19 07:38:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:17,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:18,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:18,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282181389] [2023-11-19 07:38:18,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282181389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:18,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923738319] [2023-11-19 07:38:18,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:38:18,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:18,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:18,014 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:18,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74673c6-ac5c-43fa-bfc3-b0577ca7644e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:38:18,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:38:18,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:38:18,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:38:18,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:18,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:20,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923738319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:20,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:20,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-19 07:38:20,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853973794] [2023-11-19 07:38:20,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:20,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:38:20,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:20,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:38:20,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:38:20,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 254 [2023-11-19 07:38:20,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 267 transitions, 3174 flow. Second operand has 24 states, 24 states have (on average 108.33333333333333) internal successors, (2600), 24 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:20,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:20,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 254 [2023-11-19 07:38:20,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand