./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:00:23,081 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:00:23,163 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:00:23,181 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:00:23,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:00:23,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:00:23,241 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:00:23,242 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:00:23,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:00:23,248 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:00:23,249 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:00:23,250 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:00:23,250 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:00:23,252 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:00:23,253 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:00:23,253 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:00:23,253 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:00:23,254 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:00:23,254 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:00:23,255 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:00:23,256 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:00:23,256 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:00:23,257 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:00:23,257 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:00:23,258 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:00:23,258 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:00:23,259 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:00:23,259 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:00:23,260 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:00:23,260 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:00:23,262 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:00:23,262 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:00:23,262 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:00:23,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:00:23,263 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:00:23,263 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:00:23,264 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:00:23,264 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:00:23,264 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_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 [2023-11-06 23:00:23,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:00:23,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:00:23,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:00:23,635 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:00:23,635 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:00:23,637 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2023-11-06 23:00:26,718 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:00:26,943 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:00:26,944 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2023-11-06 23:00:26,953 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/data/4962a8d4c/cc2134a19e8443cbb9709f93105b1a8f/FLAG9d0b01ff8 [2023-11-06 23:00:26,968 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/data/4962a8d4c/cc2134a19e8443cbb9709f93105b1a8f [2023-11-06 23:00:26,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:00:26,973 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:00:26,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:00:26,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:00:26,980 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:00:26,981 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:26" (1/1) ... [2023-11-06 23:00:26,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a64a461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:26, skipping insertion in model container [2023-11-06 23:00:26,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:26" (1/1) ... [2023-11-06 23:00:27,012 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:00:27,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:00:27,202 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:00:27,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:00:27,237 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:00:27,237 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:00:27,246 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:00:27,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27 WrapperNode [2023-11-06 23:00:27,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:00:27,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:00:27,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:00:27,248 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:00:27,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,263 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,285 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-11-06 23:00:27,285 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:00:27,286 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:00:27,286 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:00:27,286 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:00:27,297 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,301 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,309 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,314 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,321 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:00:27,322 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:00:27,322 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:00:27,322 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:00:27,323 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (1/1) ... [2023-11-06 23:00:27,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:00:27,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:27,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:00:27,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:00:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:00:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:00:27,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:00:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:00:27,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:00:27,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:00:27,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:00:27,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:00:27,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:00:27,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:00:27,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:00:27,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:00:27,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:00:27,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:00:27,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:00:27,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:00:27,407 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:00:27,520 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:00:27,521 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:00:27,881 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:00:27,905 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:00:27,905 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:00:27,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:27 BoogieIcfgContainer [2023-11-06 23:00:27,908 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:00:27,916 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:00:27,917 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:00:27,920 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:00:27,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:00:26" (1/3) ... [2023-11-06 23:00:27,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ab54ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:27, skipping insertion in model container [2023-11-06 23:00:27,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:27" (2/3) ... [2023-11-06 23:00:27,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ab54ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:27, skipping insertion in model container [2023-11-06 23:00:27,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:27" (3/3) ... [2023-11-06 23:00:27,923 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2023-11-06 23:00:27,943 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:00:27,943 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-06 23:00:27,943 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:00:28,038 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:00:28,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 147 transitions, 315 flow [2023-11-06 23:00:28,147 INFO L124 PetriNetUnfolderBase]: 16/144 cut-off events. [2023-11-06 23:00:28,147 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:00:28,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 144 events. 16/144 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 189 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-11-06 23:00:28,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 147 transitions, 315 flow [2023-11-06 23:00:28,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 139 transitions, 296 flow [2023-11-06 23:00:28,168 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:00:28,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 139 transitions, 296 flow [2023-11-06 23:00:28,182 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 139 transitions, 296 flow [2023-11-06 23:00:28,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 139 transitions, 296 flow [2023-11-06 23:00:28,225 INFO L124 PetriNetUnfolderBase]: 16/139 cut-off events. [2023-11-06 23:00:28,226 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:00:28,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 16/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 189 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-11-06 23:00:28,232 INFO L119 LiptonReduction]: Number of co-enabled transitions 3888 [2023-11-06 23:00:34,411 INFO L134 LiptonReduction]: Checked pairs total: 3719 [2023-11-06 23:00:34,411 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-11-06 23:00:34,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:00:34,459 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;@5f32ac47, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:00:34,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-06 23:00:34,462 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:00:34,463 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 23:00:34,463 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:00:34,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:34,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 23:00:34,464 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)] === [2023-11-06 23:00:34,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash 603, now seen corresponding path program 1 times [2023-11-06 23:00:34,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:34,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473665497] [2023-11-06 23:00:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:34,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:34,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:34,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473665497] [2023-11-06 23:00:34,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473665497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:34,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:34,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 23:00:34,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959045492] [2023-11-06 23:00:34,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:34,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:00:34,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:34,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:00:34,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:00:34,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 296 [2023-11-06 23:00:34,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 134.5) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:34,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:34,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 296 [2023-11-06 23:00:34,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:34,821 INFO L124 PetriNetUnfolderBase]: 169/252 cut-off events. [2023-11-06 23:00:34,822 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-06 23:00:34,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 252 events. 169/252 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 545 event pairs, 81 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 380. Up to 253 conditions per place. [2023-11-06 23:00:34,827 INFO L140 encePairwiseOnDemand]: 293/296 looper letters, 29 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-11-06 23:00:34,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 134 flow [2023-11-06 23:00:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:00:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 23:00:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 300 transitions. [2023-11-06 23:00:34,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2023-11-06 23:00:34,843 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 300 transitions. [2023-11-06 23:00:34,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 300 transitions. [2023-11-06 23:00:34,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:34,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 300 transitions. [2023-11-06 23:00:34,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 150.0) internal successors, (300), 2 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:34,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:34,864 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:34,866 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 82 flow. Second operand 2 states and 300 transitions. [2023-11-06 23:00:34,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 134 flow [2023-11-06 23:00:34,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 122 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:00:34,872 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 64 flow [2023-11-06 23:00:34,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-11-06 23:00:34,878 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2023-11-06 23:00:34,879 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 64 flow [2023-11-06 23:00:34,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 134.5) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:34,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:34,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:00:34,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:00:34,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:00:34,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 593940, now seen corresponding path program 1 times [2023-11-06 23:00:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:34,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534890668] [2023-11-06 23:00:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:35,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:35,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534890668] [2023-11-06 23:00:35,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534890668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:35,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:35,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:35,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684438324] [2023-11-06 23:00:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:35,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:35,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:35,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:35,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 296 [2023-11-06 23:00:35,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:35,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 296 [2023-11-06 23:00:35,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:35,420 INFO L124 PetriNetUnfolderBase]: 159/236 cut-off events. [2023-11-06 23:00:35,420 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:35,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 236 events. 159/236 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 499 event pairs, 76 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 479. Up to 236 conditions per place. [2023-11-06 23:00:35,423 INFO L140 encePairwiseOnDemand]: 293/296 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-06 23:00:35,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 114 flow [2023-11-06 23:00:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-11-06 23:00:35,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45157657657657657 [2023-11-06 23:00:35,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-11-06 23:00:35,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-11-06 23:00:35,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:35,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-11-06 23:00:35,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,434 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 64 flow. Second operand 3 states and 401 transitions. [2023-11-06 23:00:35,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 114 flow [2023-11-06 23:00:35,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:00:35,436 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 62 flow [2023-11-06 23:00:35,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-06 23:00:35,437 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2023-11-06 23:00:35,437 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 62 flow [2023-11-06 23:00:35,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:35,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:00:35,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:00:35,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:00:35,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash 593939, now seen corresponding path program 1 times [2023-11-06 23:00:35,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:35,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526578453] [2023-11-06 23:00:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:35,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:35,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526578453] [2023-11-06 23:00:35,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526578453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:35,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:35,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:35,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103425086] [2023-11-06 23:00:35,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:35,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:35,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:35,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:35,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:35,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 296 [2023-11-06 23:00:35,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:35,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 296 [2023-11-06 23:00:35,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:35,635 INFO L124 PetriNetUnfolderBase]: 149/220 cut-off events. [2023-11-06 23:00:35,635 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:35,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 220 events. 149/220 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 456 event pairs, 71 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 448. Up to 220 conditions per place. [2023-11-06 23:00:35,637 INFO L140 encePairwiseOnDemand]: 293/296 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-06 23:00:35,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 108 flow [2023-11-06 23:00:35,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:35,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-11-06 23:00:35,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44594594594594594 [2023-11-06 23:00:35,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-11-06 23:00:35,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-11-06 23:00:35,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:35,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-11-06 23:00:35,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,646 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 62 flow. Second operand 3 states and 396 transitions. [2023-11-06 23:00:35,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 108 flow [2023-11-06 23:00:35,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:35,648 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 59 flow [2023-11-06 23:00:35,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-06 23:00:35,649 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-11-06 23:00:35,649 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 59 flow [2023-11-06 23:00:35,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:35,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:00:35,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:00:35,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:00:35,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:35,651 INFO L85 PathProgramCache]: Analyzing trace with hash 570790928, now seen corresponding path program 1 times [2023-11-06 23:00:35,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:35,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514684070] [2023-11-06 23:00:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:35,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:35,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:35,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514684070] [2023-11-06 23:00:35,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514684070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:35,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:35,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:35,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158536253] [2023-11-06 23:00:35,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:35,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:35,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:35,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 296 [2023-11-06 23:00:35,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:35,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 296 [2023-11-06 23:00:35,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:35,853 INFO L124 PetriNetUnfolderBase]: 139/204 cut-off events. [2023-11-06 23:00:35,853 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:35,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 204 events. 139/204 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 406 event pairs, 66 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 417. Up to 204 conditions per place. [2023-11-06 23:00:35,856 INFO L140 encePairwiseOnDemand]: 293/296 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-06 23:00:35,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 101 flow [2023-11-06 23:00:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-11-06 23:00:35,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605855855855856 [2023-11-06 23:00:35,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-11-06 23:00:35,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-11-06 23:00:35,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:35,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-11-06 23:00:35,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,865 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 59 flow. Second operand 3 states and 409 transitions. [2023-11-06 23:00:35,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 101 flow [2023-11-06 23:00:35,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:35,867 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 56 flow [2023-11-06 23:00:35,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, 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=56, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-06 23:00:35,869 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -10 predicate places. [2023-11-06 23:00:35,869 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 56 flow [2023-11-06 23:00:35,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:35,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:35,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:00:35,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:00:35,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:00:35,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:35,872 INFO L85 PathProgramCache]: Analyzing trace with hash 570790927, now seen corresponding path program 1 times [2023-11-06 23:00:35,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:35,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787797827] [2023-11-06 23:00:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:35,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:35,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:35,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787797827] [2023-11-06 23:00:35,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787797827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:35,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:35,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:35,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543632672] [2023-11-06 23:00:35,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:35,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:35,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:36,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 296 [2023-11-06 23:00:36,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:36,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 296 [2023-11-06 23:00:36,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:36,090 INFO L124 PetriNetUnfolderBase]: 129/188 cut-off events. [2023-11-06 23:00:36,090 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:36,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 188 events. 129/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 362 event pairs, 61 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 386. Up to 188 conditions per place. [2023-11-06 23:00:36,092 INFO L140 encePairwiseOnDemand]: 293/296 looper letters, 20 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-06 23:00:36,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 21 transitions, 94 flow [2023-11-06 23:00:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-11-06 23:00:36,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44144144144144143 [2023-11-06 23:00:36,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-11-06 23:00:36,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-11-06 23:00:36,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:36,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-11-06 23:00:36,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,101 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 56 flow. Second operand 3 states and 392 transitions. [2023-11-06 23:00:36,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 21 transitions, 94 flow [2023-11-06 23:00:36,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:36,103 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 53 flow [2023-11-06 23:00:36,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-11-06 23:00:36,104 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2023-11-06 23:00:36,104 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 53 flow [2023-11-06 23:00:36,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:36,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:36,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:00:36,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:00:36,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:36,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1225720474, now seen corresponding path program 1 times [2023-11-06 23:00:36,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:36,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902919070] [2023-11-06 23:00:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:36,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:36,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902919070] [2023-11-06 23:00:36,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902919070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:36,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:36,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:00:36,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472380799] [2023-11-06 23:00:36,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:36,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:00:36,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:36,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:00:36,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:00:36,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 296 [2023-11-06 23:00:36,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:36,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 296 [2023-11-06 23:00:36,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:36,362 INFO L124 PetriNetUnfolderBase]: 105/156 cut-off events. [2023-11-06 23:00:36,362 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:36,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 156 events. 105/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 277 event pairs, 49 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 323. Up to 156 conditions per place. [2023-11-06 23:00:36,365 INFO L140 encePairwiseOnDemand]: 294/296 looper letters, 19 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-11-06 23:00:36,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 91 flow [2023-11-06 23:00:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-11-06 23:00:36,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2023-11-06 23:00:36,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-11-06 23:00:36,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-11-06 23:00:36,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:36,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-11-06 23:00:36,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,373 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 53 flow. Second operand 3 states and 366 transitions. [2023-11-06 23:00:36,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 91 flow [2023-11-06 23:00:36,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:36,375 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 52 flow [2023-11-06 23:00:36,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-11-06 23:00:36,377 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2023-11-06 23:00:36,380 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 52 flow [2023-11-06 23:00:36,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:36,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:36,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:00:36,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 23:00:36,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1225720473, now seen corresponding path program 1 times [2023-11-06 23:00:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:36,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93608842] [2023-11-06 23:00:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:36,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:36,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:36,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93608842] [2023-11-06 23:00:36,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93608842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:36,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:36,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:00:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489835251] [2023-11-06 23:00:36,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:36,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:36,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:36,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 296 [2023-11-06 23:00:36,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:36,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 296 [2023-11-06 23:00:36,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:36,763 INFO L124 PetriNetUnfolderBase]: 81/124 cut-off events. [2023-11-06 23:00:36,763 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:36,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 124 events. 81/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 194 event pairs, 37 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 260. Up to 124 conditions per place. [2023-11-06 23:00:36,765 INFO L140 encePairwiseOnDemand]: 294/296 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-06 23:00:36,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 19 transitions, 88 flow [2023-11-06 23:00:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-11-06 23:00:36,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44819819819819817 [2023-11-06 23:00:36,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-11-06 23:00:36,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-11-06 23:00:36,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:36,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-11-06 23:00:36,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,775 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 52 flow. Second operand 3 states and 398 transitions. [2023-11-06 23:00:36,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 19 transitions, 88 flow [2023-11-06 23:00:36,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:36,777 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 51 flow [2023-11-06 23:00:36,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-11-06 23:00:36,779 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2023-11-06 23:00:36,779 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 51 flow [2023-11-06 23:00:36,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:36,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:36,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:00:36,781 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)] === [2023-11-06 23:00:36,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:36,782 INFO L85 PathProgramCache]: Analyzing trace with hash -650910761, now seen corresponding path program 1 times [2023-11-06 23:00:36,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:36,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833700748] [2023-11-06 23:00:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:36,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:36,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:36,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833700748] [2023-11-06 23:00:36,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833700748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:36,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:36,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479728838] [2023-11-06 23:00:36,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:36,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:36,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:36,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:36,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:36,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 296 [2023-11-06 23:00:36,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:36,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 296 [2023-11-06 23:00:36,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:36,969 INFO L124 PetriNetUnfolderBase]: 161/245 cut-off events. [2023-11-06 23:00:36,969 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:00:36,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 245 events. 161/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 600 event pairs, 37 based on Foata normal form. 1/158 useless extension candidates. Maximal degree in co-relation 509. Up to 167 conditions per place. [2023-11-06 23:00:36,971 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 30 selfloop transitions, 4 changer transitions 1/35 dead transitions. [2023-11-06 23:00:36,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 158 flow [2023-11-06 23:00:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-11-06 23:00:36,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47635135135135137 [2023-11-06 23:00:36,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-11-06 23:00:36,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-11-06 23:00:36,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:36,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-11-06 23:00:36,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,978 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 51 flow. Second operand 3 states and 423 transitions. [2023-11-06 23:00:36,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 158 flow [2023-11-06 23:00:36,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:36,980 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 76 flow [2023-11-06 23:00:36,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2023-11-06 23:00:36,983 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-11-06 23:00:36,983 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 76 flow [2023-11-06 23:00:36,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:36,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:36,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:36,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:00:36,984 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)] === [2023-11-06 23:00:36,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash 421757077, now seen corresponding path program 1 times [2023-11-06 23:00:36,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:36,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102715945] [2023-11-06 23:00:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:36,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:37,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:37,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102715945] [2023-11-06 23:00:37,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102715945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:37,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:37,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:00:37,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534903562] [2023-11-06 23:00:37,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:37,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:37,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:37,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:37,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:37,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 296 [2023-11-06 23:00:37,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:37,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 296 [2023-11-06 23:00:37,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:37,159 INFO L124 PetriNetUnfolderBase]: 157/236 cut-off events. [2023-11-06 23:00:37,159 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-06 23:00:37,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 236 events. 157/236 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 558 event pairs, 29 based on Foata normal form. 32/268 useless extension candidates. Maximal degree in co-relation 625. Up to 147 conditions per place. [2023-11-06 23:00:37,161 INFO L140 encePairwiseOnDemand]: 293/296 looper letters, 29 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-06 23:00:37,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 32 transitions, 168 flow [2023-11-06 23:00:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-11-06 23:00:37,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47297297297297297 [2023-11-06 23:00:37,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-11-06 23:00:37,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-11-06 23:00:37,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:37,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-11-06 23:00:37,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,168 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 76 flow. Second operand 3 states and 420 transitions. [2023-11-06 23:00:37,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 32 transitions, 168 flow [2023-11-06 23:00:37,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 162 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:37,170 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 87 flow [2023-11-06 23:00:37,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, 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=3, PETRI_FLOW=87, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-11-06 23:00:37,171 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-11-06 23:00:37,171 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 87 flow [2023-11-06 23:00:37,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:37,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:37,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:00:37,172 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)] === [2023-11-06 23:00:37,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash 842240973, now seen corresponding path program 1 times [2023-11-06 23:00:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:37,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479843824] [2023-11-06 23:00:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:37,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:37,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:37,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479843824] [2023-11-06 23:00:37,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479843824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:37,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:37,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:00:37,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288211141] [2023-11-06 23:00:37,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:37,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:37,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:37,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:37,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:37,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 296 [2023-11-06 23:00:37,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:37,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 296 [2023-11-06 23:00:37,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:37,346 INFO L124 PetriNetUnfolderBase]: 171/254 cut-off events. [2023-11-06 23:00:37,346 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-11-06 23:00:37,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 254 events. 171/254 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 632 event pairs, 35 based on Foata normal form. 24/278 useless extension candidates. Maximal degree in co-relation 745. Up to 199 conditions per place. [2023-11-06 23:00:37,349 INFO L140 encePairwiseOnDemand]: 293/296 looper letters, 31 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-11-06 23:00:37,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 34 transitions, 194 flow [2023-11-06 23:00:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-11-06 23:00:37,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47297297297297297 [2023-11-06 23:00:37,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-11-06 23:00:37,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-11-06 23:00:37,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:37,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-11-06 23:00:37,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,356 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 87 flow. Second operand 3 states and 420 transitions. [2023-11-06 23:00:37,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 34 transitions, 194 flow [2023-11-06 23:00:37,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:37,358 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 101 flow [2023-11-06 23:00:37,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-11-06 23:00:37,359 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-11-06 23:00:37,359 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 101 flow [2023-11-06 23:00:37,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:37,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:37,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 23:00:37,360 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)] === [2023-11-06 23:00:37,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:37,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1494544997, now seen corresponding path program 1 times [2023-11-06 23:00:37,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:37,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671125022] [2023-11-06 23:00:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:37,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:00:37,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:37,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671125022] [2023-11-06 23:00:37,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671125022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:37,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:37,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:00:37,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481464728] [2023-11-06 23:00:37,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:37,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:37,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:37,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:37,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 296 [2023-11-06 23:00:37,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:37,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 296 [2023-11-06 23:00:37,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:37,578 INFO L124 PetriNetUnfolderBase]: 220/325 cut-off events. [2023-11-06 23:00:37,578 INFO L125 PetriNetUnfolderBase]: For 320/320 co-relation queries the response was YES. [2023-11-06 23:00:37,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 325 events. 220/325 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 803 event pairs, 40 based on Foata normal form. 26/351 useless extension candidates. Maximal degree in co-relation 1030. Up to 199 conditions per place. [2023-11-06 23:00:37,582 INFO L140 encePairwiseOnDemand]: 293/296 looper letters, 33 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-11-06 23:00:37,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 222 flow [2023-11-06 23:00:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-11-06 23:00:37,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47297297297297297 [2023-11-06 23:00:37,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-11-06 23:00:37,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-11-06 23:00:37,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:37,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-11-06 23:00:37,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,590 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 101 flow. Second operand 3 states and 420 transitions. [2023-11-06 23:00:37,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 222 flow [2023-11-06 23:00:37,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:37,593 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 115 flow [2023-11-06 23:00:37,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-06 23:00:37,594 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2023-11-06 23:00:37,594 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 115 flow [2023-11-06 23:00:37,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:37,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:37,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:00:37,595 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)] === [2023-11-06 23:00:37,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2043675398, now seen corresponding path program 1 times [2023-11-06 23:00:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:37,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358623449] [2023-11-06 23:00:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:37,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:00:37,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:37,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358623449] [2023-11-06 23:00:37,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358623449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:37,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240613479] [2023-11-06 23:00:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:37,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:37,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:37,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:37,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:00:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:38,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:00:38,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:38,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:38,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240613479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:38,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:38,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2023-11-06 23:00:38,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545858291] [2023-11-06 23:00:38,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:00:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:38,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:00:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:00:38,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 296 [2023-11-06 23:00:38,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 115 flow. Second operand has 9 states, 9 states have (on average 122.11111111111111) internal successors, (1099), 9 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:38,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:38,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 296 [2023-11-06 23:00:38,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:39,003 INFO L124 PetriNetUnfolderBase]: 315/466 cut-off events. [2023-11-06 23:00:39,004 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2023-11-06 23:00:39,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 466 events. 315/466 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1333 event pairs, 10 based on Foata normal form. 36/502 useless extension candidates. Maximal degree in co-relation 1583. Up to 247 conditions per place. [2023-11-06 23:00:39,009 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 73 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2023-11-06 23:00:39,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 86 transitions, 526 flow [2023-11-06 23:00:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:00:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:00:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1012 transitions. [2023-11-06 23:00:39,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42736486486486486 [2023-11-06 23:00:39,014 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1012 transitions. [2023-11-06 23:00:39,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1012 transitions. [2023-11-06 23:00:39,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:39,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1012 transitions. [2023-11-06 23:00:39,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.5) internal successors, (1012), 8 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:39,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:39,023 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:39,023 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 115 flow. Second operand 8 states and 1012 transitions. [2023-11-06 23:00:39,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 86 transitions, 526 flow [2023-11-06 23:00:39,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 86 transitions, 522 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:39,028 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 204 flow [2023-11-06 23:00:39,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=204, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2023-11-06 23:00:39,029 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-11-06 23:00:39,029 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 204 flow [2023-11-06 23:00:39,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.11111111111111) internal successors, (1099), 9 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:39,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:39,030 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:39,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:39,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:39,236 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)] === [2023-11-06 23:00:39,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1382333633, now seen corresponding path program 2 times [2023-11-06 23:00:39,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:39,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991196839] [2023-11-06 23:00:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:39,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:00:39,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:39,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991196839] [2023-11-06 23:00:39,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991196839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:39,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970649783] [2023-11-06 23:00:39,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:00:39,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:39,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:39,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:39,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:00:39,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:00:39,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:39,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:00:39,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:00:39,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:00:40,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970649783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:40,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:40,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-06 23:00:40,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259152195] [2023-11-06 23:00:40,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:40,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:00:40,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:40,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:00:40,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:00:40,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 296 [2023-11-06 23:00:40,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 115.625) internal successors, (925), 8 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:40,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:40,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 296 [2023-11-06 23:00:40,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:40,722 INFO L124 PetriNetUnfolderBase]: 509/744 cut-off events. [2023-11-06 23:00:40,722 INFO L125 PetriNetUnfolderBase]: For 1182/1182 co-relation queries the response was YES. [2023-11-06 23:00:40,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 744 events. 509/744 cut-off events. For 1182/1182 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2344 event pairs, 4 based on Foata normal form. 94/838 useless extension candidates. Maximal degree in co-relation 2993. Up to 433 conditions per place. [2023-11-06 23:00:40,731 INFO L140 encePairwiseOnDemand]: 290/296 looper letters, 131 selfloop transitions, 40 changer transitions 0/171 dead transitions. [2023-11-06 23:00:40,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 171 transitions, 1302 flow [2023-11-06 23:00:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:00:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 23:00:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2240 transitions. [2023-11-06 23:00:40,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39829302987197723 [2023-11-06 23:00:40,741 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2240 transitions. [2023-11-06 23:00:40,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2240 transitions. [2023-11-06 23:00:40,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:40,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2240 transitions. [2023-11-06 23:00:40,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 117.89473684210526) internal successors, (2240), 19 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:40,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 296.0) internal successors, (5920), 20 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:40,766 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 296.0) internal successors, (5920), 20 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:40,766 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 204 flow. Second operand 19 states and 2240 transitions. [2023-11-06 23:00:40,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 171 transitions, 1302 flow [2023-11-06 23:00:40,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 171 transitions, 1150 flow, removed 63 selfloop flow, removed 2 redundant places. [2023-11-06 23:00:40,778 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 538 flow [2023-11-06 23:00:40,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=538, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-11-06 23:00:40,779 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 30 predicate places. [2023-11-06 23:00:40,779 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 538 flow [2023-11-06 23:00:40,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.625) internal successors, (925), 8 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:40,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:40,780 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:40,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:40,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:40,986 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)] === [2023-11-06 23:00:40,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:40,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1966946315, now seen corresponding path program 3 times [2023-11-06 23:00:40,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:40,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939678274] [2023-11-06 23:00:40,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:40,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:42,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:42,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939678274] [2023-11-06 23:00:42,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939678274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:42,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890182090] [2023-11-06 23:00:42,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:00:42,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:42,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:42,552 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:42,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:00:42,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:00:42,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:42,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:00:42,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:43,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:44,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890182090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:44,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:44,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-11-06 23:00:44,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097090601] [2023-11-06 23:00:44,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:44,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:00:44,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:44,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:00:44,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:00:44,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 296 [2023-11-06 23:00:44,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 538 flow. Second operand has 25 states, 25 states have (on average 96.28) internal successors, (2407), 25 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:44,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:44,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 296 [2023-11-06 23:00:44,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:51,785 INFO L124 PetriNetUnfolderBase]: 4955/7214 cut-off events. [2023-11-06 23:00:51,785 INFO L125 PetriNetUnfolderBase]: For 35378/35378 co-relation queries the response was YES. [2023-11-06 23:00:51,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35712 conditions, 7214 events. 4955/7214 cut-off events. For 35378/35378 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 37572 event pairs, 4 based on Foata normal form. 76/7290 useless extension candidates. Maximal degree in co-relation 35694. Up to 3827 conditions per place. [2023-11-06 23:00:51,876 INFO L140 encePairwiseOnDemand]: 288/296 looper letters, 489 selfloop transitions, 685 changer transitions 50/1224 dead transitions. [2023-11-06 23:00:51,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 1224 transitions, 11381 flow [2023-11-06 23:00:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-06 23:00:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-11-06 23:00:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 9452 transitions. [2023-11-06 23:00:51,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3470916568742656 [2023-11-06 23:00:51,912 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 9452 transitions. [2023-11-06 23:00:51,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 9452 transitions. [2023-11-06 23:00:51,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:51,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 9452 transitions. [2023-11-06 23:00:51,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 102.73913043478261) internal successors, (9452), 92 states have internal predecessors, (9452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:51,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 296.0) internal successors, (27528), 93 states have internal predecessors, (27528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:52,000 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 296.0) internal successors, (27528), 93 states have internal predecessors, (27528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:52,001 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 538 flow. Second operand 92 states and 9452 transitions. [2023-11-06 23:00:52,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 1224 transitions, 11381 flow [2023-11-06 23:00:52,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 1224 transitions, 9640 flow, removed 752 selfloop flow, removed 6 redundant places. [2023-11-06 23:00:52,135 INFO L231 Difference]: Finished difference. Result has 162 places, 798 transitions, 7771 flow [2023-11-06 23:00:52,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=7771, PETRI_PLACES=162, PETRI_TRANSITIONS=798} [2023-11-06 23:00:52,136 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 123 predicate places. [2023-11-06 23:00:52,136 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 798 transitions, 7771 flow [2023-11-06 23:00:52,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 96.28) internal successors, (2407), 25 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:52,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:52,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:52,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:52,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:52,345 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)] === [2023-11-06 23:00:52,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:52,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1800983499, now seen corresponding path program 4 times [2023-11-06 23:00:52,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:52,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334921189] [2023-11-06 23:00:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:52,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:53,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:53,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334921189] [2023-11-06 23:00:53,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334921189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:53,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057161728] [2023-11-06 23:00:53,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:00:53,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:53,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:53,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:53,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:00:53,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:00:53,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:53,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:00:53,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:54,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:00:55,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057161728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:55,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:55,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 19 [2023-11-06 23:00:55,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017365252] [2023-11-06 23:00:55,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:55,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:00:55,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:55,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:00:55,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:00:55,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 296 [2023-11-06 23:00:55,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 798 transitions, 7771 flow. Second operand has 21 states, 21 states have (on average 95.47619047619048) internal successors, (2005), 21 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:55,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:55,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 296 [2023-11-06 23:00:55,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:07,215 INFO L124 PetriNetUnfolderBase]: 11108/17001 cut-off events. [2023-11-06 23:01:07,216 INFO L125 PetriNetUnfolderBase]: For 79205/79205 co-relation queries the response was YES. [2023-11-06 23:01:07,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87041 conditions, 17001 events. 11108/17001 cut-off events. For 79205/79205 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 110621 event pairs, 2 based on Foata normal form. 159/17008 useless extension candidates. Maximal degree in co-relation 87016. Up to 8337 conditions per place. [2023-11-06 23:01:07,387 INFO L140 encePairwiseOnDemand]: 288/296 looper letters, 749 selfloop transitions, 2261 changer transitions 228/3238 dead transitions. [2023-11-06 23:01:07,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 3238 transitions, 35600 flow [2023-11-06 23:01:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-06 23:01:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2023-11-06 23:01:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 12319 transitions. [2023-11-06 23:01:07,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3411331413380594 [2023-11-06 23:01:07,413 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 12319 transitions. [2023-11-06 23:01:07,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 12319 transitions. [2023-11-06 23:01:07,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:07,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 12319 transitions. [2023-11-06 23:01:07,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 100.97540983606558) internal successors, (12319), 122 states have internal predecessors, (12319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:07,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 296.0) internal successors, (36408), 123 states have internal predecessors, (36408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:07,659 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 296.0) internal successors, (36408), 123 states have internal predecessors, (36408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:07,659 INFO L175 Difference]: Start difference. First operand has 162 places, 798 transitions, 7771 flow. Second operand 122 states and 12319 transitions. [2023-11-06 23:01:07,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 3238 transitions, 35600 flow [2023-11-06 23:01:08,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 3238 transitions, 26939 flow, removed 4312 selfloop flow, removed 6 redundant places. [2023-11-06 23:01:08,823 INFO L231 Difference]: Finished difference. Result has 310 places, 2534 transitions, 25127 flow [2023-11-06 23:01:08,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=5114, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=676, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=25127, PETRI_PLACES=310, PETRI_TRANSITIONS=2534} [2023-11-06 23:01:08,824 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 271 predicate places. [2023-11-06 23:01:08,825 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 2534 transitions, 25127 flow [2023-11-06 23:01:08,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 95.47619047619048) internal successors, (2005), 21 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:08,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:08,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:08,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:09,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:01:09,033 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)] === [2023-11-06 23:01:09,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:09,033 INFO L85 PathProgramCache]: Analyzing trace with hash 135025223, now seen corresponding path program 5 times [2023-11-06 23:01:09,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:09,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102568331] [2023-11-06 23:01:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:09,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:10,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:10,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102568331] [2023-11-06 23:01:10,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102568331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:10,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477086430] [2023-11-06 23:01:10,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:01:10,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:10,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:10,255 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:10,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:01:10,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:01:10,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:10,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:01:10,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:10,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:11,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477086430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:11,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:11,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 19 [2023-11-06 23:01:11,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772741777] [2023-11-06 23:01:11,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:11,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:01:11,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:11,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:01:11,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:01:11,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 296 [2023-11-06 23:01:11,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 2534 transitions, 25127 flow. Second operand has 21 states, 21 states have (on average 97.76190476190476) internal successors, (2053), 21 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:11,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:11,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 296 [2023-11-06 23:01:11,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:26,950 INFO L124 PetriNetUnfolderBase]: 19703/29923 cut-off events. [2023-11-06 23:01:26,950 INFO L125 PetriNetUnfolderBase]: For 113336/113336 co-relation queries the response was YES. [2023-11-06 23:01:27,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155727 conditions, 29923 events. 19703/29923 cut-off events. For 113336/113336 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 209495 event pairs, 103 based on Foata normal form. 88/29703 useless extension candidates. Maximal degree in co-relation 155672. Up to 8303 conditions per place. [2023-11-06 23:01:27,309 INFO L140 encePairwiseOnDemand]: 288/296 looper letters, 1031 selfloop transitions, 3967 changer transitions 186/5184 dead transitions. [2023-11-06 23:01:27,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 5184 transitions, 62590 flow [2023-11-06 23:01:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 23:01:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 23:01:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3979 transitions. [2023-11-06 23:01:27,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35375177809388336 [2023-11-06 23:01:27,319 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3979 transitions. [2023-11-06 23:01:27,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3979 transitions. [2023-11-06 23:01:27,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:27,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3979 transitions. [2023-11-06 23:01:27,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 104.71052631578948) internal successors, (3979), 38 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:27,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 296.0) internal successors, (11544), 39 states have internal predecessors, (11544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:27,340 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 296.0) internal successors, (11544), 39 states have internal predecessors, (11544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:27,340 INFO L175 Difference]: Start difference. First operand has 310 places, 2534 transitions, 25127 flow. Second operand 38 states and 3979 transitions. [2023-11-06 23:01:27,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 5184 transitions, 62590 flow [2023-11-06 23:01:36,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 5184 transitions, 59252 flow, removed 1650 selfloop flow, removed 13 redundant places. [2023-11-06 23:01:36,855 INFO L231 Difference]: Finished difference. Result has 343 places, 4704 transitions, 61517 flow [2023-11-06 23:01:36,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=23354, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=61517, PETRI_PLACES=343, PETRI_TRANSITIONS=4704} [2023-11-06 23:01:36,858 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 304 predicate places. [2023-11-06 23:01:36,858 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 4704 transitions, 61517 flow [2023-11-06 23:01:36,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.76190476190476) internal successors, (2053), 21 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:36,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:36,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:36,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:37,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:37,065 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)] === [2023-11-06 23:01:37,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:37,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1512277549, now seen corresponding path program 6 times [2023-11-06 23:01:37,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:37,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976456120] [2023-11-06 23:01:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:37,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:38,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:38,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976456120] [2023-11-06 23:01:38,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976456120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:38,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133377405] [2023-11-06 23:01:38,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:01:38,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:38,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:38,215 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:38,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:01:38,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:01:38,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:38,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:01:38,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:38,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:39,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133377405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:39,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:39,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-06 23:01:39,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570953758] [2023-11-06 23:01:39,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:39,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 23:01:39,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:39,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 23:01:39,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-11-06 23:01:40,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 296 [2023-11-06 23:01:40,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 4704 transitions, 61517 flow. Second operand has 24 states, 24 states have (on average 95.25) internal successors, (2286), 24 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:40,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:40,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 296 [2023-11-06 23:01:40,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:29,486 INFO L124 PetriNetUnfolderBase]: 28958/43645 cut-off events. [2023-11-06 23:02:29,486 INFO L125 PetriNetUnfolderBase]: For 243649/243649 co-relation queries the response was YES. [2023-11-06 23:02:29,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279644 conditions, 43645 events. 28958/43645 cut-off events. For 243649/243649 co-relation queries the response was YES. Maximal size of possible extension queue 2261. Compared 316710 event pairs, 312 based on Foata normal form. 46/43539 useless extension candidates. Maximal degree in co-relation 279577. Up to 13481 conditions per place. [2023-11-06 23:02:30,086 INFO L140 encePairwiseOnDemand]: 288/296 looper letters, 2378 selfloop transitions, 5886 changer transitions 223/8487 dead transitions. [2023-11-06 23:02:30,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 8487 transitions, 129472 flow [2023-11-06 23:02:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-06 23:02:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-06 23:02:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 6110 transitions. [2023-11-06 23:02:30,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33839167035888346 [2023-11-06 23:02:30,098 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 6110 transitions. [2023-11-06 23:02:30,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 6110 transitions. [2023-11-06 23:02:30,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:30,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 6110 transitions. [2023-11-06 23:02:30,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 100.1639344262295) internal successors, (6110), 61 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:30,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 296.0) internal successors, (18352), 62 states have internal predecessors, (18352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:30,133 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 296.0) internal successors, (18352), 62 states have internal predecessors, (18352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:30,133 INFO L175 Difference]: Start difference. First operand has 343 places, 4704 transitions, 61517 flow. Second operand 61 states and 6110 transitions. [2023-11-06 23:02:30,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 8487 transitions, 129472 flow [2023-11-06 23:03:38,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 8487 transitions, 127446 flow, removed 841 selfloop flow, removed 7 redundant places. [2023-11-06 23:03:38,306 INFO L231 Difference]: Finished difference. Result has 426 places, 7895 transitions, 129150 flow [2023-11-06 23:03:38,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=60386, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=129150, PETRI_PLACES=426, PETRI_TRANSITIONS=7895} [2023-11-06 23:03:38,311 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 387 predicate places. [2023-11-06 23:03:38,311 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 7895 transitions, 129150 flow [2023-11-06 23:03:38,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 95.25) internal successors, (2286), 24 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:38,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:38,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:38,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:38,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:38,518 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)] === [2023-11-06 23:03:38,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:38,519 INFO L85 PathProgramCache]: Analyzing trace with hash -197835565, now seen corresponding path program 7 times [2023-11-06 23:03:38,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:38,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445062047] [2023-11-06 23:03:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:38,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:39,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:39,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445062047] [2023-11-06 23:03:39,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445062047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:39,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105920486] [2023-11-06 23:03:39,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:03:39,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:39,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:39,526 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:39,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33590471-f51d-4cea-9349-3ec88a3873fc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:03:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:39,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:03:39,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:40,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105920486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:41,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:41,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 24 [2023-11-06 23:03:41,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098821350] [2023-11-06 23:03:41,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:41,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:03:41,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:03:41,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:03:41,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 296 [2023-11-06 23:03:41,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 7895 transitions, 129150 flow. Second operand has 26 states, 26 states have (on average 95.26923076923077) internal successors, (2477), 26 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:41,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:41,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 296 [2023-11-06 23:03:41,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand