./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:11:30,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:11:30,894 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:11:30,899 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:11:30,900 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:11:30,946 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:11:30,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:11:30,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:11:30,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:11:30,955 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:11:30,956 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:11:30,956 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:11:30,957 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:11:30,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:11:30,959 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:11:30,960 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:11:30,960 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:11:30,961 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:11:30,961 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:11:30,962 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:11:30,962 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:11:30,963 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:11:30,963 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:11:30,964 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:11:30,964 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:11:30,964 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:11:30,965 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:11:30,966 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:11:30,966 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:11:30,967 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:11:30,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:11:30,969 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:11:30,969 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:11:30,969 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:11:30,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:11:30,970 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:11:30,970 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:11:30,970 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:11:30,971 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:11:30,971 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_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2023-11-21 22:11:31,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:11:31,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:11:31,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:11:31,377 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:11:31,378 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:11:31,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/mult-dist.wvr.c [2023-11-21 22:11:34,612 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:11:34,966 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:11:34,967 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/sv-benchmarks/c/weaver/mult-dist.wvr.c [2023-11-21 22:11:34,977 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/data/281795937/f1974106637c4c128c5a3b4484bac137/FLAG2f755bb30 [2023-11-21 22:11:34,995 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/data/281795937/f1974106637c4c128c5a3b4484bac137 [2023-11-21 22:11:35,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:11:35,003 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:11:35,009 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:11:35,009 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:11:35,015 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:11:35,017 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:11:34" (1/1) ... [2023-11-21 22:11:35,020 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d88699b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35, skipping insertion in model container [2023-11-21 22:11:35,020 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:11:34" (1/1) ... [2023-11-21 22:11:35,049 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:11:35,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:11:35,297 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:11:35,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:11:35,344 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:11:35,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35 WrapperNode [2023-11-21 22:11:35,345 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:11:35,346 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:11:35,346 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:11:35,346 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:11:35,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,388 INFO L138 Inliner]: procedures = 22, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-21 22:11:35,389 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:11:35,389 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:11:35,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:11:35,390 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:11:35,400 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,404 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,404 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,413 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,417 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,419 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,424 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:11:35,425 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:11:35,425 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:11:35,425 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:11:35,426 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (1/1) ... [2023-11-21 22:11:35,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:11:35,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:11:35,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:11:35,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:11:35,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:11:35,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-21 22:11:35,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-21 22:11:35,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-21 22:11:35,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-21 22:11:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-21 22:11:35,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-21 22:11:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:11:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:11:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:11:35,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:11:35,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:11:35,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:11:35,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:11:35,532 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:11:35,651 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:11:35,654 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:11:35,944 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:11:36,252 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:11:36,253 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:11:36,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:11:36 BoogieIcfgContainer [2023-11-21 22:11:36,255 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:11:36,259 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:11:36,259 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:11:36,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:11:36,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:11:34" (1/3) ... [2023-11-21 22:11:36,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4b9de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:11:36, skipping insertion in model container [2023-11-21 22:11:36,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:35" (2/3) ... [2023-11-21 22:11:36,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4b9de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:11:36, skipping insertion in model container [2023-11-21 22:11:36,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:11:36" (3/3) ... [2023-11-21 22:11:36,267 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2023-11-21 22:11:36,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:11:36,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-21 22:11:36,303 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:11:36,396 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-21 22:11:36,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 47 transitions, 115 flow [2023-11-21 22:11:36,525 INFO L124 PetriNetUnfolderBase]: 3/44 cut-off events. [2023-11-21 22:11:36,526 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-21 22:11:36,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 44 events. 3/44 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-21 22:11:36,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 47 transitions, 115 flow [2023-11-21 22:11:36,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 104 flow [2023-11-21 22:11:36,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:11:36,576 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;@4cfff51c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:11:36,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-21 22:11:36,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:11:36,582 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-21 22:11:36,583 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:11:36,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:36,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:11:36,585 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)] === [2023-11-21 22:11:36,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 9919, now seen corresponding path program 1 times [2023-11-21 22:11:36,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:36,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558418307] [2023-11-21 22:11:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:37,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:37,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558418307] [2023-11-21 22:11:37,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558418307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:11:37,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:11:37,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:11:37,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67475160] [2023-11-21 22:11:37,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:37,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:11:37,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:37,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:11:37,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:11:37,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2023-11-21 22:11:37,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:37,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:37,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2023-11-21 22:11:37,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:37,513 INFO L124 PetriNetUnfolderBase]: 280/484 cut-off events. [2023-11-21 22:11:37,515 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-21 22:11:37,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 484 events. 280/484 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1569 event pairs, 178 based on Foata normal form. 1/339 useless extension candidates. Maximal degree in co-relation 783. Up to 401 conditions per place. [2023-11-21 22:11:37,523 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 21 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-21 22:11:37,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 140 flow [2023-11-21 22:11:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:11:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:11:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-21 22:11:37,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2023-11-21 22:11:37,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-21 22:11:37,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-21 22:11:37,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:37,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-21 22:11:37,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:37,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:37,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:37,552 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 104 flow. Second operand 3 states and 88 transitions. [2023-11-21 22:11:37,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 140 flow [2023-11-21 22:11:37,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 128 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-21 22:11:37,561 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 86 flow [2023-11-21 22:11:37,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-11-21 22:11:37,567 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2023-11-21 22:11:37,567 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 86 flow [2023-11-21 22:11:37,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:37,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:37,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:11:37,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:11:37,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:11:37,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 9920, now seen corresponding path program 1 times [2023-11-21 22:11:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:37,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305562668] [2023-11-21 22:11:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:37,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:37,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:37,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305562668] [2023-11-21 22:11:37,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305562668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:11:37,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:11:37,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:11:37,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093066766] [2023-11-21 22:11:37,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:37,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:11:37,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:37,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:11:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:11:37,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2023-11-21 22:11:37,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:37,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:37,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2023-11-21 22:11:37,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:37,907 INFO L124 PetriNetUnfolderBase]: 199/343 cut-off events. [2023-11-21 22:11:37,907 INFO L125 PetriNetUnfolderBase]: For 13/15 co-relation queries the response was YES. [2023-11-21 22:11:37,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 343 events. 199/343 cut-off events. For 13/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1049 event pairs, 124 based on Foata normal form. 28/263 useless extension candidates. Maximal degree in co-relation 646. Up to 292 conditions per place. [2023-11-21 22:11:37,912 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 19 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-21 22:11:37,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 122 flow [2023-11-21 22:11:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:11:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:11:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-21 22:11:37,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453900709219859 [2023-11-21 22:11:37,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-21 22:11:37,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-21 22:11:37,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:37,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-21 22:11:37,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:37,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:37,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:37,919 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 86 flow. Second operand 3 states and 91 transitions. [2023-11-21 22:11:37,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 122 flow [2023-11-21 22:11:37,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:11:37,921 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 83 flow [2023-11-21 22:11:37,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-21 22:11:37,923 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -9 predicate places. [2023-11-21 22:11:37,923 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 83 flow [2023-11-21 22:11:37,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:37,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:37,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:11:37,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:11:37,924 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)] === [2023-11-21 22:11:37,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:37,925 INFO L85 PathProgramCache]: Analyzing trace with hash 295764153, now seen corresponding path program 1 times [2023-11-21 22:11:37,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:37,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423518619] [2023-11-21 22:11:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:37,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:38,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:38,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423518619] [2023-11-21 22:11:38,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423518619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:11:38,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:11:38,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:11:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043879303] [2023-11-21 22:11:38,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:38,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:11:38,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:11:38,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:11:38,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2023-11-21 22:11:38,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:38,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2023-11-21 22:11:38,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:38,223 INFO L124 PetriNetUnfolderBase]: 220/374 cut-off events. [2023-11-21 22:11:38,223 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-21 22:11:38,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 374 events. 220/374 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1102 event pairs, 138 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 710. Up to 325 conditions per place. [2023-11-21 22:11:38,229 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 21 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-21 22:11:38,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 123 flow [2023-11-21 22:11:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:11:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:11:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-11-21 22:11:38,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2023-11-21 22:11:38,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-11-21 22:11:38,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-11-21 22:11:38,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:38,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-11-21 22:11:38,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,236 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 83 flow. Second operand 3 states and 87 transitions. [2023-11-21 22:11:38,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 123 flow [2023-11-21 22:11:38,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 122 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:11:38,239 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 80 flow [2023-11-21 22:11:38,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-11-21 22:11:38,240 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -10 predicate places. [2023-11-21 22:11:38,240 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 80 flow [2023-11-21 22:11:38,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:38,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:11:38,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:11:38,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:11:38,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash 295764154, now seen corresponding path program 1 times [2023-11-21 22:11:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:38,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565557708] [2023-11-21 22:11:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:38,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:38,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:38,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565557708] [2023-11-21 22:11:38,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565557708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:11:38,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:11:38,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:11:38,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054332967] [2023-11-21 22:11:38,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:38,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:11:38,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:11:38,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:11:38,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2023-11-21 22:11:38,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:38,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2023-11-21 22:11:38,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:38,449 INFO L124 PetriNetUnfolderBase]: 199/333 cut-off events. [2023-11-21 22:11:38,449 INFO L125 PetriNetUnfolderBase]: For 13/15 co-relation queries the response was YES. [2023-11-21 22:11:38,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 333 events. 199/333 cut-off events. For 13/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 975 event pairs, 124 based on Foata normal form. 9/244 useless extension candidates. Maximal degree in co-relation 636. Up to 292 conditions per place. [2023-11-21 22:11:38,454 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 19 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-21 22:11:38,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 116 flow [2023-11-21 22:11:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:11:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:11:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-21 22:11:38,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453900709219859 [2023-11-21 22:11:38,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-21 22:11:38,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-21 22:11:38,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:38,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-21 22:11:38,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,483 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 80 flow. Second operand 3 states and 91 transitions. [2023-11-21 22:11:38,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 116 flow [2023-11-21 22:11:38,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 33 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:11:38,485 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 77 flow [2023-11-21 22:11:38,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-21 22:11:38,486 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -11 predicate places. [2023-11-21 22:11:38,486 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 77 flow [2023-11-21 22:11:38,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:38,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:38,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:11:38,488 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)] === [2023-11-21 22:11:38,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:38,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2132229365, now seen corresponding path program 1 times [2023-11-21 22:11:38,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:38,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954697630] [2023-11-21 22:11:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:38,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:38,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954697630] [2023-11-21 22:11:38,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954697630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:11:38,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:11:38,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:11:38,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439250180] [2023-11-21 22:11:38,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:38,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:11:38,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:11:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:11:38,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2023-11-21 22:11:38,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:38,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2023-11-21 22:11:38,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:38,647 INFO L124 PetriNetUnfolderBase]: 220/352 cut-off events. [2023-11-21 22:11:38,647 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-21 22:11:38,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 352 events. 220/352 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 953 event pairs, 138 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 688. Up to 325 conditions per place. [2023-11-21 22:11:38,651 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 21 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-21 22:11:38,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 117 flow [2023-11-21 22:11:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:11:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:11:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-11-21 22:11:38,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2023-11-21 22:11:38,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-11-21 22:11:38,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-11-21 22:11:38,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:38,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-11-21 22:11:38,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,656 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 77 flow. Second operand 3 states and 87 transitions. [2023-11-21 22:11:38,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 117 flow [2023-11-21 22:11:38,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 31 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:11:38,659 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 74 flow [2023-11-21 22:11:38,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-11-21 22:11:38,660 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -12 predicate places. [2023-11-21 22:11:38,660 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 74 flow [2023-11-21 22:11:38,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:38,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:38,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:11:38,662 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:11:38,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2132229366, now seen corresponding path program 1 times [2023-11-21 22:11:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:38,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764179622] [2023-11-21 22:11:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:38,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:38,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764179622] [2023-11-21 22:11:38,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764179622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:11:38,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:11:38,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:11:38,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271160356] [2023-11-21 22:11:38,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:38,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:11:38,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:38,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:11:38,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:11:38,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2023-11-21 22:11:38,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:38,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2023-11-21 22:11:38,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:38,842 INFO L124 PetriNetUnfolderBase]: 199/319 cut-off events. [2023-11-21 22:11:38,843 INFO L125 PetriNetUnfolderBase]: For 13/15 co-relation queries the response was YES. [2023-11-21 22:11:38,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 319 events. 199/319 cut-off events. For 13/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 856 event pairs, 124 based on Foata normal form. 11/246 useless extension candidates. Maximal degree in co-relation 622. Up to 292 conditions per place. [2023-11-21 22:11:38,846 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 19 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-21 22:11:38,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 110 flow [2023-11-21 22:11:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:11:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:11:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-21 22:11:38,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453900709219859 [2023-11-21 22:11:38,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-21 22:11:38,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-21 22:11:38,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:38,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-21 22:11:38,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,852 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 74 flow. Second operand 3 states and 91 transitions. [2023-11-21 22:11:38,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 110 flow [2023-11-21 22:11:38,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:11:38,854 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 71 flow [2023-11-21 22:11:38,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-21 22:11:38,855 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -13 predicate places. [2023-11-21 22:11:38,855 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 71 flow [2023-11-21 22:11:38,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:38,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:38,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:38,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:11:38,856 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:11:38,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:38,857 INFO L85 PathProgramCache]: Analyzing trace with hash -77619352, now seen corresponding path program 1 times [2023-11-21 22:11:38,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:38,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693775894] [2023-11-21 22:11:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:38,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:39,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:39,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693775894] [2023-11-21 22:11:39,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693775894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:11:39,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:11:39,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:11:39,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337998031] [2023-11-21 22:11:39,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:39,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:11:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:11:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:11:39,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:11:39,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:39,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:39,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:11:39,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:39,312 INFO L124 PetriNetUnfolderBase]: 386/615 cut-off events. [2023-11-21 22:11:39,313 INFO L125 PetriNetUnfolderBase]: For 17/19 co-relation queries the response was YES. [2023-11-21 22:11:39,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1211 conditions, 615 events. 386/615 cut-off events. For 17/19 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2179 event pairs, 124 based on Foata normal form. 1/457 useless extension candidates. Maximal degree in co-relation 1200. Up to 349 conditions per place. [2023-11-21 22:11:39,319 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2023-11-21 22:11:39,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 46 transitions, 184 flow [2023-11-21 22:11:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:11:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:11:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2023-11-21 22:11:39,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8014184397163121 [2023-11-21 22:11:39,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 113 transitions. [2023-11-21 22:11:39,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 113 transitions. [2023-11-21 22:11:39,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:39,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 113 transitions. [2023-11-21 22:11:39,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:39,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:39,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:39,326 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 71 flow. Second operand 3 states and 113 transitions. [2023-11-21 22:11:39,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 46 transitions, 184 flow [2023-11-21 22:11:39,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 46 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:11:39,330 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 96 flow [2023-11-21 22:11:39,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-21 22:11:39,331 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -11 predicate places. [2023-11-21 22:11:39,332 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 96 flow [2023-11-21 22:11:39,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:39,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:39,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:39,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:11:39,337 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)] === [2023-11-21 22:11:39,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:39,338 INFO L85 PathProgramCache]: Analyzing trace with hash -609916501, now seen corresponding path program 1 times [2023-11-21 22:11:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:39,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511004719] [2023-11-21 22:11:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:39,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:39,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:39,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511004719] [2023-11-21 22:11:39,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511004719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:11:39,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:11:39,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:11:39,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372052382] [2023-11-21 22:11:39,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:39,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:11:39,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:11:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:11:39,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:11:39,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 96 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:39,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:39,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:11:39,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:40,025 INFO L124 PetriNetUnfolderBase]: 544/818 cut-off events. [2023-11-21 22:11:40,025 INFO L125 PetriNetUnfolderBase]: For 169/173 co-relation queries the response was YES. [2023-11-21 22:11:40,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966 conditions, 818 events. 544/818 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2895 event pairs, 176 based on Foata normal form. 2/805 useless extension candidates. Maximal degree in co-relation 1953. Up to 554 conditions per place. [2023-11-21 22:11:40,035 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 47 selfloop transitions, 18 changer transitions 3/77 dead transitions. [2023-11-21 22:11:40,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 77 transitions, 369 flow [2023-11-21 22:11:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:11:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:11:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 234 transitions. [2023-11-21 22:11:40,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7112462006079028 [2023-11-21 22:11:40,038 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 234 transitions. [2023-11-21 22:11:40,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 234 transitions. [2023-11-21 22:11:40,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:40,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 234 transitions. [2023-11-21 22:11:40,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:40,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:40,041 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:40,042 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 96 flow. Second operand 7 states and 234 transitions. [2023-11-21 22:11:40,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 77 transitions, 369 flow [2023-11-21 22:11:40,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 77 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:11:40,045 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 220 flow [2023-11-21 22:11:40,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=220, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-11-21 22:11:40,047 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-11-21 22:11:40,047 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 220 flow [2023-11-21 22:11:40,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:40,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:40,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:40,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:11:40,048 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)] === [2023-11-21 22:11:40,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1095744237, now seen corresponding path program 2 times [2023-11-21 22:11:40,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:40,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577790121] [2023-11-21 22:11:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:40,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:40,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:40,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577790121] [2023-11-21 22:11:40,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577790121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:11:40,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548617598] [2023-11-21 22:11:40,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:11:40,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:11:40,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:11:40,532 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:11:40,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:11:40,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:11:40,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:11:40,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:11:40,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:11:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:41,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:11:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:41,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548617598] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:11:41,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:11:41,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2023-11-21 22:11:41,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727130642] [2023-11-21 22:11:41,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:41,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:11:41,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:41,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:11:41,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:11:41,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:11:41,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:41,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:41,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:11:41,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:42,478 INFO L124 PetriNetUnfolderBase]: 849/1290 cut-off events. [2023-11-21 22:11:42,478 INFO L125 PetriNetUnfolderBase]: For 1219/1233 co-relation queries the response was YES. [2023-11-21 22:11:42,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4027 conditions, 1290 events. 849/1290 cut-off events. For 1219/1233 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5238 event pairs, 231 based on Foata normal form. 14/1287 useless extension candidates. Maximal degree in co-relation 4010. Up to 454 conditions per place. [2023-11-21 22:11:42,497 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 90 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2023-11-21 22:11:42,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 120 transitions, 722 flow [2023-11-21 22:11:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:11:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:11:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 291 transitions. [2023-11-21 22:11:42,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.773936170212766 [2023-11-21 22:11:42,500 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 291 transitions. [2023-11-21 22:11:42,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 291 transitions. [2023-11-21 22:11:42,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:42,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 291 transitions. [2023-11-21 22:11:42,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 36.375) internal successors, (291), 8 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:42,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 47.0) internal successors, (423), 9 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) [2023-11-21 22:11:42,504 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 47.0) internal successors, (423), 9 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) [2023-11-21 22:11:42,504 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 220 flow. Second operand 8 states and 291 transitions. [2023-11-21 22:11:42,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 120 transitions, 722 flow [2023-11-21 22:11:42,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 120 transitions, 700 flow, removed 11 selfloop flow, removed 0 redundant places. [2023-11-21 22:11:42,517 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 353 flow [2023-11-21 22:11:42,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=353, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-11-21 22:11:42,518 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2023-11-21 22:11:42,518 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 353 flow [2023-11-21 22:11:42,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:42,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:42,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:42,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:11:42,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:11:42,726 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)] === [2023-11-21 22:11:42,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash -334161496, now seen corresponding path program 1 times [2023-11-21 22:11:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:42,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648906836] [2023-11-21 22:11:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:42,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:43,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648906836] [2023-11-21 22:11:43,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648906836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:11:43,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993459674] [2023-11-21 22:11:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:43,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:11:43,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:11:43,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:11:43,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:11:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:43,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:11:43,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:11:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:43,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:11:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:44,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993459674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:11:44,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:11:44,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2023-11-21 22:11:44,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510250854] [2023-11-21 22:11:44,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:11:44,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:11:44,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:11:44,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:11:44,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:11:44,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 353 flow. Second operand has 15 states, 15 states have (on average 27.266666666666666) internal successors, (409), 15 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) [2023-11-21 22:11:44,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:44,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:11:44,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:45,752 INFO L124 PetriNetUnfolderBase]: 1451/2315 cut-off events. [2023-11-21 22:11:45,753 INFO L125 PetriNetUnfolderBase]: For 5465/5489 co-relation queries the response was YES. [2023-11-21 22:11:45,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8667 conditions, 2315 events. 1451/2315 cut-off events. For 5465/5489 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11701 event pairs, 194 based on Foata normal form. 33/2333 useless extension candidates. Maximal degree in co-relation 8644. Up to 723 conditions per place. [2023-11-21 22:11:45,787 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 195 selfloop transitions, 70 changer transitions 0/274 dead transitions. [2023-11-21 22:11:45,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 274 transitions, 2019 flow [2023-11-21 22:11:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 22:11:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-21 22:11:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 762 transitions. [2023-11-21 22:11:45,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7369439071566731 [2023-11-21 22:11:45,792 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 762 transitions. [2023-11-21 22:11:45,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 762 transitions. [2023-11-21 22:11:45,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:45,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 762 transitions. [2023-11-21 22:11:45,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 34.63636363636363) internal successors, (762), 22 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:45,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 47.0) internal successors, (1081), 23 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:45,802 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 47.0) internal successors, (1081), 23 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:45,802 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 353 flow. Second operand 22 states and 762 transitions. [2023-11-21 22:11:45,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 274 transitions, 2019 flow [2023-11-21 22:11:45,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 274 transitions, 1947 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-11-21 22:11:45,844 INFO L231 Difference]: Finished difference. Result has 98 places, 117 transitions, 1036 flow [2023-11-21 22:11:45,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1036, PETRI_PLACES=98, PETRI_TRANSITIONS=117} [2023-11-21 22:11:45,847 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 48 predicate places. [2023-11-21 22:11:45,847 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 117 transitions, 1036 flow [2023-11-21 22:11:45,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 27.266666666666666) internal successors, (409), 15 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) [2023-11-21 22:11:45,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:45,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:45,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:11:46,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 22:11:46,064 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)] === [2023-11-21 22:11:46,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash 368369408, now seen corresponding path program 2 times [2023-11-21 22:11:46,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:46,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009921577] [2023-11-21 22:11:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:46,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:46,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:46,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009921577] [2023-11-21 22:11:46,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009921577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:11:46,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272713620] [2023-11-21 22:11:46,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:11:46,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:11:46,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:11:46,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:11:46,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:11:46,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:11:46,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:11:46,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:11:46,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:11:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:46,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:11:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:46,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272713620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:11:46,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:11:46,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-21 22:11:46,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356005555] [2023-11-21 22:11:46,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:11:46,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:11:46,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:46,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:11:46,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:11:46,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:11:46,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 117 transitions, 1036 flow. Second operand has 12 states, 12 states have (on average 27.416666666666668) internal successors, (329), 12 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:46,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:46,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:11:46,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:47,609 INFO L124 PetriNetUnfolderBase]: 1557/2434 cut-off events. [2023-11-21 22:11:47,609 INFO L125 PetriNetUnfolderBase]: For 21717/21742 co-relation queries the response was YES. [2023-11-21 22:11:47,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13346 conditions, 2434 events. 1557/2434 cut-off events. For 21717/21742 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11793 event pairs, 653 based on Foata normal form. 4/2401 useless extension candidates. Maximal degree in co-relation 13305. Up to 1960 conditions per place. [2023-11-21 22:11:47,655 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 117 selfloop transitions, 33 changer transitions 0/159 dead transitions. [2023-11-21 22:11:47,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 159 transitions, 1738 flow [2023-11-21 22:11:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:11:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:11:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 240 transitions. [2023-11-21 22:11:47,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.729483282674772 [2023-11-21 22:11:47,657 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 240 transitions. [2023-11-21 22:11:47,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 240 transitions. [2023-11-21 22:11:47,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:47,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 240 transitions. [2023-11-21 22:11:47,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:47,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:47,661 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:47,661 INFO L175 Difference]: Start difference. First operand has 98 places, 117 transitions, 1036 flow. Second operand 7 states and 240 transitions. [2023-11-21 22:11:47,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 159 transitions, 1738 flow [2023-11-21 22:11:47,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 159 transitions, 1618 flow, removed 60 selfloop flow, removed 0 redundant places. [2023-11-21 22:11:47,726 INFO L231 Difference]: Finished difference. Result has 107 places, 129 transitions, 1158 flow [2023-11-21 22:11:47,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1158, PETRI_PLACES=107, PETRI_TRANSITIONS=129} [2023-11-21 22:11:47,727 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2023-11-21 22:11:47,728 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 129 transitions, 1158 flow [2023-11-21 22:11:47,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.416666666666668) internal successors, (329), 12 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:47,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:47,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:47,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:11:47,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 22:11:47,949 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)] === [2023-11-21 22:11:47,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2066735845, now seen corresponding path program 1 times [2023-11-21 22:11:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:47,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613273133] [2023-11-21 22:11:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:47,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:48,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:48,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613273133] [2023-11-21 22:11:48,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613273133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:11:48,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:11:48,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:11:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930147793] [2023-11-21 22:11:48,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:48,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:11:48,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:11:48,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:11:48,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:11:48,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 129 transitions, 1158 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:48,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:48,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:11:48,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:48,928 INFO L124 PetriNetUnfolderBase]: 1565/2518 cut-off events. [2023-11-21 22:11:48,928 INFO L125 PetriNetUnfolderBase]: For 25111/25141 co-relation queries the response was YES. [2023-11-21 22:11:48,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13939 conditions, 2518 events. 1565/2518 cut-off events. For 25111/25141 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12728 event pairs, 561 based on Foata normal form. 15/2507 useless extension candidates. Maximal degree in co-relation 13894. Up to 1384 conditions per place. [2023-11-21 22:11:48,983 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 122 selfloop transitions, 28 changer transitions 13/172 dead transitions. [2023-11-21 22:11:48,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 172 transitions, 1797 flow [2023-11-21 22:11:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:11:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:11:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 246 transitions. [2023-11-21 22:11:48,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7477203647416414 [2023-11-21 22:11:48,985 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 246 transitions. [2023-11-21 22:11:48,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 246 transitions. [2023-11-21 22:11:48,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:48,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 246 transitions. [2023-11-21 22:11:48,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:48,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:48,988 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:48,988 INFO L175 Difference]: Start difference. First operand has 107 places, 129 transitions, 1158 flow. Second operand 7 states and 246 transitions. [2023-11-21 22:11:48,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 172 transitions, 1797 flow [2023-11-21 22:11:49,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 172 transitions, 1739 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-21 22:11:49,072 INFO L231 Difference]: Finished difference. Result has 113 places, 128 transitions, 1158 flow [2023-11-21 22:11:49,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1158, PETRI_PLACES=113, PETRI_TRANSITIONS=128} [2023-11-21 22:11:49,075 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 63 predicate places. [2023-11-21 22:11:49,075 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 128 transitions, 1158 flow [2023-11-21 22:11:49,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:49,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:49,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:11:49,076 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)] === [2023-11-21 22:11:49,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1179093817, now seen corresponding path program 3 times [2023-11-21 22:11:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778109331] [2023-11-21 22:11:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:49,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:49,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778109331] [2023-11-21 22:11:49,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778109331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:11:49,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589212801] [2023-11-21 22:11:49,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:11:49,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:11:49,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:11:49,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:11:49,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:11:49,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 22:11:49,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:11:49,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:11:49,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:11:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:49,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:11:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:49,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589212801] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:11:49,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:11:49,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2023-11-21 22:11:49,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436135985] [2023-11-21 22:11:49,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:49,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:11:49,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:49,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:11:49,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:11:49,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:11:49,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 128 transitions, 1158 flow. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:49,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:49,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:11:49,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:50,523 INFO L124 PetriNetUnfolderBase]: 1617/2561 cut-off events. [2023-11-21 22:11:50,523 INFO L125 PetriNetUnfolderBase]: For 28999/29008 co-relation queries the response was YES. [2023-11-21 22:11:50,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14607 conditions, 2561 events. 1617/2561 cut-off events. For 28999/29008 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12809 event pairs, 443 based on Foata normal form. 12/2548 useless extension candidates. Maximal degree in co-relation 14560. Up to 1058 conditions per place. [2023-11-21 22:11:50,561 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 132 selfloop transitions, 37 changer transitions 0/178 dead transitions. [2023-11-21 22:11:50,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 178 transitions, 1883 flow [2023-11-21 22:11:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:11:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:11:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2023-11-21 22:11:50,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7553191489361702 [2023-11-21 22:11:50,563 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 213 transitions. [2023-11-21 22:11:50,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 213 transitions. [2023-11-21 22:11:50,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:50,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 213 transitions. [2023-11-21 22:11:50,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 35.5) internal successors, (213), 6 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:50,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:50,566 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:50,566 INFO L175 Difference]: Start difference. First operand has 113 places, 128 transitions, 1158 flow. Second operand 6 states and 213 transitions. [2023-11-21 22:11:50,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 178 transitions, 1883 flow [2023-11-21 22:11:50,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 178 transitions, 1809 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-21 22:11:50,631 INFO L231 Difference]: Finished difference. Result has 113 places, 141 transitions, 1361 flow [2023-11-21 22:11:50,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1361, PETRI_PLACES=113, PETRI_TRANSITIONS=141} [2023-11-21 22:11:50,632 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 63 predicate places. [2023-11-21 22:11:50,632 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 141 transitions, 1361 flow [2023-11-21 22:11:50,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:50,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:50,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:50,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:11:50,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:11:50,855 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)] === [2023-11-21 22:11:50,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1137678188, now seen corresponding path program 3 times [2023-11-21 22:11:50,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:50,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486612499] [2023-11-21 22:11:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:50,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:51,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:51,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486612499] [2023-11-21 22:11:51,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486612499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:11:51,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759373108] [2023-11-21 22:11:51,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:11:51,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:11:51,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:11:51,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:11:51,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:11:51,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 22:11:51,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:11:51,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:11:51,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:11:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:51,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:11:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:51,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759373108] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:11:51,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:11:51,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2023-11-21 22:11:51,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733967838] [2023-11-21 22:11:51,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:11:51,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:11:51,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:51,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:11:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:11:51,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:11:51,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 141 transitions, 1361 flow. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:51,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:51,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:11:51,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:52,836 INFO L124 PetriNetUnfolderBase]: 2182/3420 cut-off events. [2023-11-21 22:11:52,836 INFO L125 PetriNetUnfolderBase]: For 40582/40632 co-relation queries the response was YES. [2023-11-21 22:11:52,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20994 conditions, 3420 events. 2182/3420 cut-off events. For 40582/40632 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17966 event pairs, 499 based on Foata normal form. 30/3422 useless extension candidates. Maximal degree in co-relation 20946. Up to 1101 conditions per place. [2023-11-21 22:11:52,890 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 148 selfloop transitions, 77 changer transitions 0/234 dead transitions. [2023-11-21 22:11:52,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 234 transitions, 2753 flow [2023-11-21 22:11:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:11:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:11:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 287 transitions. [2023-11-21 22:11:52,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7632978723404256 [2023-11-21 22:11:52,893 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 287 transitions. [2023-11-21 22:11:52,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 287 transitions. [2023-11-21 22:11:52,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:52,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 287 transitions. [2023-11-21 22:11:52,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 35.875) internal successors, (287), 8 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:52,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 47.0) internal successors, (423), 9 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) [2023-11-21 22:11:52,896 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 47.0) internal successors, (423), 9 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) [2023-11-21 22:11:52,896 INFO L175 Difference]: Start difference. First operand has 113 places, 141 transitions, 1361 flow. Second operand 8 states and 287 transitions. [2023-11-21 22:11:52,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 234 transitions, 2753 flow [2023-11-21 22:11:53,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 234 transitions, 2690 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-11-21 22:11:53,049 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 1978 flow [2023-11-21 22:11:53,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1978, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2023-11-21 22:11:53,050 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2023-11-21 22:11:53,051 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 1978 flow [2023-11-21 22:11:53,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:53,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:53,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:53,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-21 22:11:53,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:11:53,253 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)] === [2023-11-21 22:11:53,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2060473285, now seen corresponding path program 4 times [2023-11-21 22:11:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:53,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483773632] [2023-11-21 22:11:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:53,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:53,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483773632] [2023-11-21 22:11:53,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483773632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:11:53,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003318488] [2023-11-21 22:11:53,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:11:53,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:11:53,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:11:53,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:11:53,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:11:53,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:11:53,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:11:53,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:11:53,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:11:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:53,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:11:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:54,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003318488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:11:54,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:11:54,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-11-21 22:11:54,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759303206] [2023-11-21 22:11:54,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:11:54,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:11:54,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:11:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:11:54,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:11:54,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 1978 flow. Second operand has 16 states, 16 states have (on average 27.3125) internal successors, (437), 16 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:54,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:54,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:11:54,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:11:57,405 INFO L124 PetriNetUnfolderBase]: 3361/5273 cut-off events. [2023-11-21 22:11:57,405 INFO L125 PetriNetUnfolderBase]: For 90865/90886 co-relation queries the response was YES. [2023-11-21 22:11:57,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36100 conditions, 5273 events. 3361/5273 cut-off events. For 90865/90886 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 29758 event pairs, 570 based on Foata normal form. 28/5268 useless extension candidates. Maximal degree in co-relation 36046. Up to 1794 conditions per place. [2023-11-21 22:11:57,668 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 248 selfloop transitions, 217 changer transitions 0/474 dead transitions. [2023-11-21 22:11:57,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 474 transitions, 6467 flow [2023-11-21 22:11:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-21 22:11:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-21 22:11:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 917 transitions. [2023-11-21 22:11:57,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7226162332545312 [2023-11-21 22:11:57,675 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 917 transitions. [2023-11-21 22:11:57,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 917 transitions. [2023-11-21 22:11:57,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:11:57,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 917 transitions. [2023-11-21 22:11:57,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 33.96296296296296) internal successors, (917), 27 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:57,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 47.0) internal successors, (1316), 28 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:57,688 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 47.0) internal successors, (1316), 28 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:57,688 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 1978 flow. Second operand 27 states and 917 transitions. [2023-11-21 22:11:57,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 474 transitions, 6467 flow [2023-11-21 22:11:57,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 474 transitions, 6453 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-11-21 22:11:57,967 INFO L231 Difference]: Finished difference. Result has 170 places, 310 transitions, 5024 flow [2023-11-21 22:11:57,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5024, PETRI_PLACES=170, PETRI_TRANSITIONS=310} [2023-11-21 22:11:57,969 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 120 predicate places. [2023-11-21 22:11:57,969 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 310 transitions, 5024 flow [2023-11-21 22:11:57,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 27.3125) internal successors, (437), 16 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:57,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:11:57,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:11:57,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:11:58,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:11:58,189 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)] === [2023-11-21 22:11:58,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:11:58,189 INFO L85 PathProgramCache]: Analyzing trace with hash -634421049, now seen corresponding path program 5 times [2023-11-21 22:11:58,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:11:58,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962121134] [2023-11-21 22:11:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:11:58,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:11:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:11:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:58,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:11:58,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962121134] [2023-11-21 22:11:58,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962121134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:11:58,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706797728] [2023-11-21 22:11:58,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:11:58,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:11:58,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:11:58,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:11:58,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:11:58,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:11:58,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:11:58,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:11:58,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:11:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:58,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:11:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:11:59,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706797728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:11:59,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:11:59,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-21 22:11:59,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490513037] [2023-11-21 22:11:59,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:11:59,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:11:59,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:11:59,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:11:59,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:11:59,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:11:59,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 310 transitions, 5024 flow. Second operand has 12 states, 12 states have (on average 27.75) internal successors, (333), 12 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:11:59,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:11:59,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:11:59,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:12:01,399 INFO L124 PetriNetUnfolderBase]: 3550/5593 cut-off events. [2023-11-21 22:12:01,399 INFO L125 PetriNetUnfolderBase]: For 136142/136224 co-relation queries the response was YES. [2023-11-21 22:12:01,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44903 conditions, 5593 events. 3550/5593 cut-off events. For 136142/136224 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 32243 event pairs, 707 based on Foata normal form. 51/5608 useless extension candidates. Maximal degree in co-relation 44831. Up to 2017 conditions per place. [2023-11-21 22:12:01,548 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 235 selfloop transitions, 172 changer transitions 0/416 dead transitions. [2023-11-21 22:12:01,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 416 transitions, 7173 flow [2023-11-21 22:12:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:12:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-21 22:12:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 350 transitions. [2023-11-21 22:12:01,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7446808510638298 [2023-11-21 22:12:01,551 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 350 transitions. [2023-11-21 22:12:01,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 350 transitions. [2023-11-21 22:12:01,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:12:01,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 350 transitions. [2023-11-21 22:12:01,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:01,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:01,555 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:01,555 INFO L175 Difference]: Start difference. First operand has 170 places, 310 transitions, 5024 flow. Second operand 10 states and 350 transitions. [2023-11-21 22:12:01,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 416 transitions, 7173 flow [2023-11-21 22:12:02,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 416 transitions, 6347 flow, removed 374 selfloop flow, removed 1 redundant places. [2023-11-21 22:12:02,467 INFO L231 Difference]: Finished difference. Result has 183 places, 343 transitions, 5274 flow [2023-11-21 22:12:02,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4227, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5274, PETRI_PLACES=183, PETRI_TRANSITIONS=343} [2023-11-21 22:12:02,468 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 133 predicate places. [2023-11-21 22:12:02,468 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 343 transitions, 5274 flow [2023-11-21 22:12:02,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.75) internal successors, (333), 12 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:02,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:12:02,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:12:02,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-21 22:12:02,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 22:12:02,670 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)] === [2023-11-21 22:12:02,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:02,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1428857402, now seen corresponding path program 4 times [2023-11-21 22:12:02,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:02,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691929162] [2023-11-21 22:12:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:02,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:03,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:03,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691929162] [2023-11-21 22:12:03,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691929162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:03,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422610375] [2023-11-21 22:12:03,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:12:03,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:12:03,004 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:12:03,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:12:03,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:12:03,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:12:03,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:12:03,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:12:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:03,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:12:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:03,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422610375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:12:03,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:12:03,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-21 22:12:03,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157103692] [2023-11-21 22:12:03,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:12:03,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:12:03,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:03,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:12:03,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:12:03,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:12:03,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 343 transitions, 5274 flow. Second operand has 12 states, 12 states have (on average 27.5) internal successors, (330), 12 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:03,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:12:03,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:12:03,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:12:05,465 INFO L124 PetriNetUnfolderBase]: 3673/5846 cut-off events. [2023-11-21 22:12:05,465 INFO L125 PetriNetUnfolderBase]: For 122965/123016 co-relation queries the response was YES. [2023-11-21 22:12:05,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43310 conditions, 5846 events. 3673/5846 cut-off events. For 122965/123016 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34348 event pairs, 1208 based on Foata normal form. 19/5818 useless extension candidates. Maximal degree in co-relation 43232. Up to 3525 conditions per place. [2023-11-21 22:12:05,595 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 312 selfloop transitions, 101 changer transitions 0/422 dead transitions. [2023-11-21 22:12:05,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 422 transitions, 7189 flow [2023-11-21 22:12:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:12:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:12:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 243 transitions. [2023-11-21 22:12:05,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7386018237082067 [2023-11-21 22:12:05,597 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 243 transitions. [2023-11-21 22:12:05,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 243 transitions. [2023-11-21 22:12:05,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:12:05,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 243 transitions. [2023-11-21 22:12:05,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:05,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:05,600 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:05,600 INFO L175 Difference]: Start difference. First operand has 183 places, 343 transitions, 5274 flow. Second operand 7 states and 243 transitions. [2023-11-21 22:12:05,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 422 transitions, 7189 flow [2023-11-21 22:12:06,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 422 transitions, 7032 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-11-21 22:12:06,420 INFO L231 Difference]: Finished difference. Result has 191 places, 367 transitions, 5934 flow [2023-11-21 22:12:06,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5934, PETRI_PLACES=191, PETRI_TRANSITIONS=367} [2023-11-21 22:12:06,421 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 141 predicate places. [2023-11-21 22:12:06,421 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 367 transitions, 5934 flow [2023-11-21 22:12:06,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.5) internal successors, (330), 12 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:06,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:12:06,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:12:06,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:12:06,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 22:12:06,622 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)] === [2023-11-21 22:12:06,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:06,623 INFO L85 PathProgramCache]: Analyzing trace with hash -359111581, now seen corresponding path program 6 times [2023-11-21 22:12:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:06,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955183693] [2023-11-21 22:12:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:06,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:06,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:06,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955183693] [2023-11-21 22:12:06,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955183693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:06,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238103582] [2023-11-21 22:12:06,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 22:12:06,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:06,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:12:06,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:12:06,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:12:07,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-21 22:12:07,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:12:07,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:12:07,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:12:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:07,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:12:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:07,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238103582] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:07,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:12:07,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 16 [2023-11-21 22:12:07,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373686464] [2023-11-21 22:12:07,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:12:07,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:12:07,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:12:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:12:07,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:12:07,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 367 transitions, 5934 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:07,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:12:07,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:12:07,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:12:09,909 INFO L124 PetriNetUnfolderBase]: 4173/6655 cut-off events. [2023-11-21 22:12:09,909 INFO L125 PetriNetUnfolderBase]: For 169778/169826 co-relation queries the response was YES. [2023-11-21 22:12:10,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52266 conditions, 6655 events. 4173/6655 cut-off events. For 169778/169826 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40197 event pairs, 812 based on Foata normal form. 19/6645 useless extension candidates. Maximal degree in co-relation 52183. Up to 3426 conditions per place. [2023-11-21 22:12:10,103 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 353 selfloop transitions, 129 changer transitions 0/491 dead transitions. [2023-11-21 22:12:10,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 491 transitions, 8744 flow [2023-11-21 22:12:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:12:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:12:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 241 transitions. [2023-11-21 22:12:10,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7325227963525835 [2023-11-21 22:12:10,107 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 241 transitions. [2023-11-21 22:12:10,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 241 transitions. [2023-11-21 22:12:10,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:12:10,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 241 transitions. [2023-11-21 22:12:10,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:10,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:10,110 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:10,111 INFO L175 Difference]: Start difference. First operand has 191 places, 367 transitions, 5934 flow. Second operand 7 states and 241 transitions. [2023-11-21 22:12:10,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 491 transitions, 8744 flow [2023-11-21 22:12:11,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 491 transitions, 8546 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-11-21 22:12:11,149 INFO L231 Difference]: Finished difference. Result has 199 places, 438 transitions, 7687 flow [2023-11-21 22:12:11,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5736, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7687, PETRI_PLACES=199, PETRI_TRANSITIONS=438} [2023-11-21 22:12:11,150 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 149 predicate places. [2023-11-21 22:12:11,151 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 438 transitions, 7687 flow [2023-11-21 22:12:11,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:11,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:12:11,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:12:11,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-21 22:12:11,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-21 22:12:11,357 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:12:11,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash -907140846, now seen corresponding path program 5 times [2023-11-21 22:12:11,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:11,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462221636] [2023-11-21 22:12:11,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:11,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:11,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:11,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462221636] [2023-11-21 22:12:11,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462221636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:11,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846307939] [2023-11-21 22:12:11,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:12:11,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:11,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:12:11,661 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:12:11,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:12:11,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:12:11,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:12:11,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:12:11,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:12:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:11,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:12:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:12,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846307939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:12:12,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:12:12,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-21 22:12:12,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402417090] [2023-11-21 22:12:12,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:12:12,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:12:12,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:12,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:12:12,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:12:12,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:12:12,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 438 transitions, 7687 flow. Second operand has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:12,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:12:12,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:12:12,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:12:14,547 INFO L124 PetriNetUnfolderBase]: 4445/7063 cut-off events. [2023-11-21 22:12:14,547 INFO L125 PetriNetUnfolderBase]: For 200683/200741 co-relation queries the response was YES. [2023-11-21 22:12:14,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58221 conditions, 7063 events. 4445/7063 cut-off events. For 200683/200741 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43115 event pairs, 1264 based on Foata normal form. 25/7038 useless extension candidates. Maximal degree in co-relation 58134. Up to 5532 conditions per place. [2023-11-21 22:12:14,681 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 404 selfloop transitions, 124 changer transitions 0/537 dead transitions. [2023-11-21 22:12:14,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 537 transitions, 10380 flow [2023-11-21 22:12:14,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:12:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:12:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 236 transitions. [2023-11-21 22:12:14,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7173252279635258 [2023-11-21 22:12:14,683 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 236 transitions. [2023-11-21 22:12:14,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 236 transitions. [2023-11-21 22:12:14,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:12:14,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 236 transitions. [2023-11-21 22:12:14,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 33.714285714285715) internal successors, (236), 7 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:14,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:14,686 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:14,686 INFO L175 Difference]: Start difference. First operand has 199 places, 438 transitions, 7687 flow. Second operand 7 states and 236 transitions. [2023-11-21 22:12:14,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 537 transitions, 10380 flow [2023-11-21 22:12:16,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 537 transitions, 10042 flow, removed 169 selfloop flow, removed 0 redundant places. [2023-11-21 22:12:16,346 INFO L231 Difference]: Finished difference. Result has 210 places, 492 transitions, 8927 flow [2023-11-21 22:12:16,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7413, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8927, PETRI_PLACES=210, PETRI_TRANSITIONS=492} [2023-11-21 22:12:16,347 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2023-11-21 22:12:16,347 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 492 transitions, 8927 flow [2023-11-21 22:12:16,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:16,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:12:16,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:12:16,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:12:16,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:16,549 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-21 22:12:16,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:16,549 INFO L85 PathProgramCache]: Analyzing trace with hash 711368365, now seen corresponding path program 7 times [2023-11-21 22:12:16,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:16,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264621976] [2023-11-21 22:12:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:16,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:16,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264621976] [2023-11-21 22:12:16,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264621976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403510697] [2023-11-21 22:12:16,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 22:12:16,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:12:16,753 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:12:16,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f347c32-1302-4109-ab13-536020a4dec5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 22:12:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:16,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:12:16,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:12:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:16,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:12:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:17,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403510697] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:17,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:12:17,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 12 [2023-11-21 22:12:17,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342317448] [2023-11-21 22:12:17,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:12:17,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:12:17,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:12:17,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:12:17,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-21 22:12:17,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 492 transitions, 8927 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:17,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:12:17,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-21 22:12:17,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:12:19,636 INFO L124 PetriNetUnfolderBase]: 4545/7198 cut-off events. [2023-11-21 22:12:19,636 INFO L125 PetriNetUnfolderBase]: For 134745/134876 co-relation queries the response was YES. [2023-11-21 22:12:19,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55280 conditions, 7198 events. 4545/7198 cut-off events. For 134745/134876 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 43530 event pairs, 446 based on Foata normal form. 60/7246 useless extension candidates. Maximal degree in co-relation 55187. Up to 2675 conditions per place. [2023-11-21 22:12:19,778 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 379 selfloop transitions, 312 changer transitions 2/702 dead transitions. [2023-11-21 22:12:19,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 702 transitions, 13585 flow [2023-11-21 22:12:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:12:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:12:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 249 transitions. [2023-11-21 22:12:19,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.756838905775076 [2023-11-21 22:12:19,782 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 249 transitions. [2023-11-21 22:12:19,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 249 transitions. [2023-11-21 22:12:19,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:12:19,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 249 transitions. [2023-11-21 22:12:19,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 35.57142857142857) internal successors, (249), 7 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:19,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:19,785 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:12:19,785 INFO L175 Difference]: Start difference. First operand has 210 places, 492 transitions, 8927 flow. Second operand 7 states and 249 transitions. [2023-11-21 22:12:19,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 702 transitions, 13585 flow