./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:47:44,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:47:44,541 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:47:44,550 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:47:44,551 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:47:44,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:47:44,608 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:47:44,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:47:44,610 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:47:44,619 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:47:44,619 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:47:44,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:47:44,620 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:47:44,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:47:44,623 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:47:44,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:47:44,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:47:44,625 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:47:44,625 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:47:44,626 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:47:44,626 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:47:44,627 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:47:44,627 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:47:44,628 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:47:44,628 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:47:44,628 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:47:44,629 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:47:44,630 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:47:44,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:47:44,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:44,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:47:44,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:47:44,640 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:47:44,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:47:44,640 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:47:44,641 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:47:44,641 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:47:44,641 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:47:44,641 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_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2023-11-19 07:47:45,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:47:45,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:47:45,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:47:45,086 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:47:45,087 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:47:45,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/stack_longer-1.i [2023-11-19 07:47:48,245 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:47:48,638 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:47:48,639 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/sv-benchmarks/c/pthread/stack_longer-1.i [2023-11-19 07:47:48,666 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/data/d843c858d/5418b724c63141d38499223581040c27/FLAG65328dda2 [2023-11-19 07:47:48,686 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/data/d843c858d/5418b724c63141d38499223581040c27 [2023-11-19 07:47:48,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:47:48,698 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:47:48,701 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:48,701 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:47:48,708 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:47:48,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:48" (1/1) ... [2023-11-19 07:47:48,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1657990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:48, skipping insertion in model container [2023-11-19 07:47:48,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:48" (1/1) ... [2023-11-19 07:47:48,791 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:47:49,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:49,472 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:47:49,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:49,601 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:47:49,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49 WrapperNode [2023-11-19 07:47:49,602 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:49,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:49,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:47:49,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:47:49,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,633 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,665 INFO L138 Inliner]: procedures = 277, calls = 40, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 161 [2023-11-19 07:47:49,665 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:49,666 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:47:49,666 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:47:49,667 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:47:49,678 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,683 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,684 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,693 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,697 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,700 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,702 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,707 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:47:49,708 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:47:49,708 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:47:49,709 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:47:49,710 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:49,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:47:49,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:47:49,793 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:47:49,794 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:47:49,795 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:47:49,796 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:47:49,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:47:49,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:47:49,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:47:49,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:47:49,797 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:47:49,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:47:49,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:47:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:47:49,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:47:49,800 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:47:49,977 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:47:49,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:47:50,377 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:47:50,391 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:47:50,396 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:47:50,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:50 BoogieIcfgContainer [2023-11-19 07:47:50,406 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:47:50,410 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:47:50,410 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:47:50,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:47:50,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:47:48" (1/3) ... [2023-11-19 07:47:50,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ade90a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:50, skipping insertion in model container [2023-11-19 07:47:50,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (2/3) ... [2023-11-19 07:47:50,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ade90a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:50, skipping insertion in model container [2023-11-19 07:47:50,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:50" (3/3) ... [2023-11-19 07:47:50,419 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-11-19 07:47:50,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:47:50,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-19 07:47:50,443 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:47:50,599 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:47:50,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 192 transitions, 398 flow [2023-11-19 07:47:50,737 INFO L124 PetriNetUnfolderBase]: 12/190 cut-off events. [2023-11-19 07:47:50,738 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:47:50,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 190 events. 12/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 543 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 144. Up to 3 conditions per place. [2023-11-19 07:47:50,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 192 transitions, 398 flow [2023-11-19 07:47:50,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 185 transitions, 382 flow [2023-11-19 07:47:50,769 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:47:50,783 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 185 transitions, 382 flow [2023-11-19 07:47:50,786 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 185 transitions, 382 flow [2023-11-19 07:47:50,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 185 transitions, 382 flow [2023-11-19 07:47:50,840 INFO L124 PetriNetUnfolderBase]: 12/185 cut-off events. [2023-11-19 07:47:50,840 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:47:50,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 185 events. 12/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 535 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 144. Up to 3 conditions per place. [2023-11-19 07:47:50,851 INFO L119 LiptonReduction]: Number of co-enabled transitions 11290 [2023-11-19 07:47:56,582 INFO L134 LiptonReduction]: Checked pairs total: 16888 [2023-11-19 07:47:56,583 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-11-19 07:47:56,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:47:56,606 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;@c7590cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:47:56,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-19 07:47:56,608 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:47:56,608 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:47:56,609 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:47:56,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:56,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:47:56,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:47:56,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash 799, now seen corresponding path program 1 times [2023-11-19 07:47:56,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:56,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815995533] [2023-11-19 07:47:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:56,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:56,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:56,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815995533] [2023-11-19 07:47:56,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815995533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:56,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:56,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:47:56,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801416646] [2023-11-19 07:47:56,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:56,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:47:56,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:56,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:47:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:47:56,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 385 [2023-11-19 07:47:56,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 179.5) internal successors, (359), 2 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:56,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:56,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 385 [2023-11-19 07:47:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:57,322 INFO L124 PetriNetUnfolderBase]: 1456/2283 cut-off events. [2023-11-19 07:47:57,322 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-19 07:47:57,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4568 conditions, 2283 events. 1456/2283 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10753 event pairs, 1176 based on Foata normal form. 0/1329 useless extension candidates. Maximal degree in co-relation 4316. Up to 2240 conditions per place. [2023-11-19 07:47:57,351 INFO L140 encePairwiseOnDemand]: 383/385 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-11-19 07:47:57,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-11-19 07:47:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:47:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:47:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 404 transitions. [2023-11-19 07:47:57,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246753246753246 [2023-11-19 07:47:57,384 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 404 transitions. [2023-11-19 07:47:57,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 404 transitions. [2023-11-19 07:47:57,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:57,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 404 transitions. [2023-11-19 07:47:57,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 202.0) internal successors, (404), 2 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:57,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:57,407 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:57,410 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 404 transitions. [2023-11-19 07:47:57,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-11-19 07:47:57,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:47:57,420 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-11-19 07:47:57,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-11-19 07:47:57,427 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-19 07:47:57,427 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-11-19 07:47:57,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 179.5) internal successors, (359), 2 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:57,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:57,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:47:57,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:47:57,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:47:57,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:57,431 INFO L85 PathProgramCache]: Analyzing trace with hash 785368, now seen corresponding path program 1 times [2023-11-19 07:47:57,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:57,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449083277] [2023-11-19 07:47:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:57,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:57,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449083277] [2023-11-19 07:47:57,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449083277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:57,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:57,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:47:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075448662] [2023-11-19 07:47:57,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:57,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:57,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:57,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:57,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 385 [2023-11-19 07:47:57,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:57,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:57,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 385 [2023-11-19 07:47:57,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:58,118 INFO L124 PetriNetUnfolderBase]: 1427/2228 cut-off events. [2023-11-19 07:47:58,119 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-19 07:47:58,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4429 conditions, 2228 events. 1427/2228 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10395 event pairs, 1152 based on Foata normal form. 0/1310 useless extension candidates. Maximal degree in co-relation 4426. Up to 2183 conditions per place. [2023-11-19 07:47:58,138 INFO L140 encePairwiseOnDemand]: 381/385 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-19 07:47:58,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-11-19 07:47:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2023-11-19 07:47:58,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48744588744588746 [2023-11-19 07:47:58,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2023-11-19 07:47:58,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2023-11-19 07:47:58,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:58,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2023-11-19 07:47:58,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:58,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:58,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:58,152 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 563 transitions. [2023-11-19 07:47:58,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-11-19 07:47:58,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:47:58,156 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-11-19 07:47:58,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-11-19 07:47:58,160 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-19 07:47:58,160 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-11-19 07:47:58,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:58,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:58,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:47:58,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:47:58,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:47:58,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash 785370, now seen corresponding path program 1 times [2023-11-19 07:47:58,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:58,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266190171] [2023-11-19 07:47:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:58,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:58,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:58,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266190171] [2023-11-19 07:47:58,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266190171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:58,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:58,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:47:58,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567929556] [2023-11-19 07:47:58,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:58,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:58,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:58,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:58,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 385 [2023-11-19 07:47:58,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:58,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:58,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 385 [2023-11-19 07:47:58,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:58,602 INFO L124 PetriNetUnfolderBase]: 1398/2173 cut-off events. [2023-11-19 07:47:58,602 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-19 07:47:58,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4322 conditions, 2173 events. 1398/2173 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10077 event pairs, 1128 based on Foata normal form. 0/1291 useless extension candidates. Maximal degree in co-relation 4318. Up to 2128 conditions per place. [2023-11-19 07:47:58,620 INFO L140 encePairwiseOnDemand]: 381/385 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-11-19 07:47:58,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-11-19 07:47:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-19 07:47:58,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753246753246753 [2023-11-19 07:47:58,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-19 07:47:58,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-19 07:47:58,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:58,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-19 07:47:58,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:58,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:58,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:58,630 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 549 transitions. [2023-11-19 07:47:58,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-11-19 07:47:58,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:58,632 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-11-19 07:47:58,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-19 07:47:58,633 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-11-19 07:47:58,633 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-11-19 07:47:58,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:58,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:58,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:47:58,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:47:58,635 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:47:58,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash 754758013, now seen corresponding path program 1 times [2023-11-19 07:47:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:58,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634069731] [2023-11-19 07:47:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:58,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:58,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:58,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634069731] [2023-11-19 07:47:58,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634069731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:58,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:58,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:58,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406123207] [2023-11-19 07:47:58,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:58,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:58,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:58,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:58,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:47:58,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 385 [2023-11-19 07:47:58,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:58,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:58,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 385 [2023-11-19 07:47:58,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:59,029 INFO L124 PetriNetUnfolderBase]: 1021/1616 cut-off events. [2023-11-19 07:47:59,029 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-19 07:47:59,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3219 conditions, 1616 events. 1021/1616 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7167 event pairs, 816 based on Foata normal form. 0/1034 useless extension candidates. Maximal degree in co-relation 3215. Up to 1582 conditions per place. [2023-11-19 07:47:59,042 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-11-19 07:47:59,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-11-19 07:47:59,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-11-19 07:47:59,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2023-11-19 07:47:59,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-11-19 07:47:59,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-11-19 07:47:59,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:59,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-11-19 07:47:59,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,053 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 535 transitions. [2023-11-19 07:47:59,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-11-19 07:47:59,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:59,056 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-11-19 07:47:59,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-11-19 07:47:59,058 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-11-19 07:47:59,058 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-11-19 07:47:59,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:59,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:47:59,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:47:59,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:47:59,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:59,061 INFO L85 PathProgramCache]: Analyzing trace with hash 754758014, now seen corresponding path program 1 times [2023-11-19 07:47:59,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:59,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466373467] [2023-11-19 07:47:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:59,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:59,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:59,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466373467] [2023-11-19 07:47:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466373467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:59,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:59,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:59,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86904389] [2023-11-19 07:47:59,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:59,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:59,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:59,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:59,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:47:59,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 385 [2023-11-19 07:47:59,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:59,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 385 [2023-11-19 07:47:59,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:59,563 INFO L124 PetriNetUnfolderBase]: 644/1059 cut-off events. [2023-11-19 07:47:59,563 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-19 07:47:59,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 1059 events. 644/1059 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4509 event pairs, 504 based on Foata normal form. 0/777 useless extension candidates. Maximal degree in co-relation 2112. Up to 1036 conditions per place. [2023-11-19 07:47:59,572 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-11-19 07:47:59,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-11-19 07:47:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:59,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-11-19 07:47:59,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779220779220779 [2023-11-19 07:47:59,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-11-19 07:47:59,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-11-19 07:47:59,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:59,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-11-19 07:47:59,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,584 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 552 transitions. [2023-11-19 07:47:59,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-11-19 07:47:59,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:59,586 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-11-19 07:47:59,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-11-19 07:47:59,587 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-11-19 07:47:59,588 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-11-19 07:47:59,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:59,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:47:59,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:47:59,590 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:47:59,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:59,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1921895207, now seen corresponding path program 1 times [2023-11-19 07:47:59,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:59,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448739022] [2023-11-19 07:47:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:59,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:59,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:59,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448739022] [2023-11-19 07:47:59,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448739022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:59,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:59,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877536855] [2023-11-19 07:47:59,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:59,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:59,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:59,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:59,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:59,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 385 [2023-11-19 07:47:59,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:59,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 385 [2023-11-19 07:47:59,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:59,923 INFO L124 PetriNetUnfolderBase]: 1075/1764 cut-off events. [2023-11-19 07:47:59,923 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:47:59,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 1764 events. 1075/1764 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7993 event pairs, 309 based on Foata normal form. 0/1322 useless extension candidates. Maximal degree in co-relation 3522. Up to 1047 conditions per place. [2023-11-19 07:47:59,936 INFO L140 encePairwiseOnDemand]: 380/385 looper letters, 65 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-11-19 07:47:59,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 291 flow [2023-11-19 07:47:59,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-11-19 07:47:59,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-19 07:47:59,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-11-19 07:47:59,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-11-19 07:47:59,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:59,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-11-19 07:47:59,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,948 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 595 transitions. [2023-11-19 07:47:59,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 291 flow [2023-11-19 07:47:59,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:59,951 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-11-19 07:47:59,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-11-19 07:47:59,952 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-11-19 07:47:59,952 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-11-19 07:47:59,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:59,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:59,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:47:59,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:47:59,954 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:47:59,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:59,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1921894412, now seen corresponding path program 1 times [2023-11-19 07:47:59,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:59,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342109751] [2023-11-19 07:47:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:59,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:00,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:00,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342109751] [2023-11-19 07:48:00,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342109751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:00,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:00,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:00,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887587196] [2023-11-19 07:48:00,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:00,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:48:00,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:48:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:48:00,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 385 [2023-11-19 07:48:00,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:00,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:00,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 385 [2023-11-19 07:48:00,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:00,557 INFO L124 PetriNetUnfolderBase]: 997/1622 cut-off events. [2023-11-19 07:48:00,557 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-11-19 07:48:00,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3508 conditions, 1622 events. 997/1622 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7664 event pairs, 353 based on Foata normal form. 0/1326 useless extension candidates. Maximal degree in co-relation 3503. Up to 848 conditions per place. [2023-11-19 07:48:00,570 INFO L140 encePairwiseOnDemand]: 378/385 looper letters, 73 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2023-11-19 07:48:00,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 81 transitions, 376 flow [2023-11-19 07:48:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:48:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:48:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 924 transitions. [2023-11-19 07:48:00,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-19 07:48:00,574 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 924 transitions. [2023-11-19 07:48:00,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 924 transitions. [2023-11-19 07:48:00,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:00,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 924 transitions. [2023-11-19 07:48:00,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:00,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 385.0) internal successors, (2310), 6 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:00,583 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 385.0) internal successors, (2310), 6 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:00,583 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 924 transitions. [2023-11-19 07:48:00,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 81 transitions, 376 flow [2023-11-19 07:48:00,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 81 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:00,593 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 116 flow [2023-11-19 07:48:00,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-11-19 07:48:00,594 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2023-11-19 07:48:00,595 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 116 flow [2023-11-19 07:48:00,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:00,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:00,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:48:00,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:48:00,596 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:00,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1921894413, now seen corresponding path program 1 times [2023-11-19 07:48:00,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:00,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908048898] [2023-11-19 07:48:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:00,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:00,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908048898] [2023-11-19 07:48:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908048898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:00,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201223132] [2023-11-19 07:48:00,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:48:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:48:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:48:01,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 385 [2023-11-19 07:48:01,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:01,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 385 [2023-11-19 07:48:01,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:01,454 INFO L124 PetriNetUnfolderBase]: 1236/2022 cut-off events. [2023-11-19 07:48:01,454 INFO L125 PetriNetUnfolderBase]: For 319/319 co-relation queries the response was YES. [2023-11-19 07:48:01,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4491 conditions, 2022 events. 1236/2022 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 9123 event pairs, 266 based on Foata normal form. 0/1742 useless extension candidates. Maximal degree in co-relation 4486. Up to 1558 conditions per place. [2023-11-19 07:48:01,489 INFO L140 encePairwiseOnDemand]: 379/385 looper letters, 87 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2023-11-19 07:48:01,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 95 transitions, 439 flow [2023-11-19 07:48:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:48:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:48:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 932 transitions. [2023-11-19 07:48:01,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841558441558442 [2023-11-19 07:48:01,494 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 932 transitions. [2023-11-19 07:48:01,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 932 transitions. [2023-11-19 07:48:01,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:01,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 932 transitions. [2023-11-19 07:48:01,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.4) internal successors, (932), 5 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 385.0) internal successors, (2310), 6 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,503 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 385.0) internal successors, (2310), 6 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,503 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 116 flow. Second operand 5 states and 932 transitions. [2023-11-19 07:48:01,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 95 transitions, 439 flow [2023-11-19 07:48:01,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 95 transitions, 417 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:48:01,510 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 155 flow [2023-11-19 07:48:01,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-11-19 07:48:01,513 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-11-19 07:48:01,513 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 155 flow [2023-11-19 07:48:01,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:01,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:01,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:48:01,515 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:01,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:01,515 INFO L85 PathProgramCache]: Analyzing trace with hash 345213395, now seen corresponding path program 1 times [2023-11-19 07:48:01,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:01,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864394323] [2023-11-19 07:48:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:01,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:01,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:01,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864394323] [2023-11-19 07:48:01,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864394323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:01,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:01,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640315221] [2023-11-19 07:48:01,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:01,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:01,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:01,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:01,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:01,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 385 [2023-11-19 07:48:01,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:01,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 385 [2023-11-19 07:48:01,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:01,858 INFO L124 PetriNetUnfolderBase]: 1030/1706 cut-off events. [2023-11-19 07:48:01,859 INFO L125 PetriNetUnfolderBase]: For 289/289 co-relation queries the response was YES. [2023-11-19 07:48:01,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3819 conditions, 1706 events. 1030/1706 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7440 event pairs, 471 based on Foata normal form. 22/1506 useless extension candidates. Maximal degree in co-relation 3811. Up to 1422 conditions per place. [2023-11-19 07:48:01,874 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 58 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-19 07:48:01,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 291 flow [2023-11-19 07:48:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2023-11-19 07:48:01,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073593073593073 [2023-11-19 07:48:01,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2023-11-19 07:48:01,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2023-11-19 07:48:01,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:01,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2023-11-19 07:48:01,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,884 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 155 flow. Second operand 3 states and 586 transitions. [2023-11-19 07:48:01,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 291 flow [2023-11-19 07:48:01,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 287 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:01,888 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 142 flow [2023-11-19 07:48:01,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-19 07:48:01,889 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-11-19 07:48:01,889 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 142 flow [2023-11-19 07:48:01,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:01,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:01,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:48:01,890 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:01,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:01,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1703084239, now seen corresponding path program 1 times [2023-11-19 07:48:01,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:01,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255399880] [2023-11-19 07:48:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:01,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:01,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255399880] [2023-11-19 07:48:01,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255399880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:01,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:01,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:01,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863266228] [2023-11-19 07:48:01,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:01,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:01,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:01,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 385 [2023-11-19 07:48:01,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:01,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:01,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 385 [2023-11-19 07:48:01,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:02,261 INFO L124 PetriNetUnfolderBase]: 1089/1802 cut-off events. [2023-11-19 07:48:02,261 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2023-11-19 07:48:02,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4144 conditions, 1802 events. 1089/1802 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8000 event pairs, 776 based on Foata normal form. 54/1678 useless extension candidates. Maximal degree in co-relation 4135. Up to 1624 conditions per place. [2023-11-19 07:48:02,277 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 60 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2023-11-19 07:48:02,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 327 flow [2023-11-19 07:48:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2023-11-19 07:48:02,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038961038961038 [2023-11-19 07:48:02,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2023-11-19 07:48:02,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2023-11-19 07:48:02,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:02,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2023-11-19 07:48:02,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:02,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:02,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:02,289 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 142 flow. Second operand 3 states and 582 transitions. [2023-11-19 07:48:02,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 327 flow [2023-11-19 07:48:02,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:02,294 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 163 flow [2023-11-19 07:48:02,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-19 07:48:02,296 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-11-19 07:48:02,296 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 163 flow [2023-11-19 07:48:02,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:02,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:02,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:02,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:48:02,298 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:02,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:02,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1826382376, now seen corresponding path program 1 times [2023-11-19 07:48:02,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:02,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747086017] [2023-11-19 07:48:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:02,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:02,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:02,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747086017] [2023-11-19 07:48:02,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747086017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:02,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:02,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:02,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598605358] [2023-11-19 07:48:02,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:02,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:02,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:02,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 385 [2023-11-19 07:48:02,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:02,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:02,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 385 [2023-11-19 07:48:02,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:02,664 INFO L124 PetriNetUnfolderBase]: 1140/1855 cut-off events. [2023-11-19 07:48:02,664 INFO L125 PetriNetUnfolderBase]: For 518/518 co-relation queries the response was YES. [2023-11-19 07:48:02,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4525 conditions, 1855 events. 1140/1855 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8720 event pairs, 469 based on Foata normal form. 10/1681 useless extension candidates. Maximal degree in co-relation 4515. Up to 1589 conditions per place. [2023-11-19 07:48:02,675 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 67 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-11-19 07:48:02,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 360 flow [2023-11-19 07:48:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-11-19 07:48:02,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099567099567099 [2023-11-19 07:48:02,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-11-19 07:48:02,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-11-19 07:48:02,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:02,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-11-19 07:48:02,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:02,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:02,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:02,686 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 163 flow. Second operand 3 states and 589 transitions. [2023-11-19 07:48:02,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 360 flow [2023-11-19 07:48:02,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 355 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:02,693 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 170 flow [2023-11-19 07:48:02,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-19 07:48:02,694 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-19 07:48:02,694 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 170 flow [2023-11-19 07:48:02,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:02,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:02,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:02,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:48:02,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:02,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:02,696 INFO L85 PathProgramCache]: Analyzing trace with hash -108626651, now seen corresponding path program 1 times [2023-11-19 07:48:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:02,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056602853] [2023-11-19 07:48:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:02,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:03,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:03,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056602853] [2023-11-19 07:48:03,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056602853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:03,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639242360] [2023-11-19 07:48:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:03,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:03,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:03,228 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:03,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:48:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:03,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:48:03,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:03,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:48:03,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:03,502 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-19 07:48:03,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 07:48:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:03,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:03,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639242360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:03,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:03,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 18 [2023-11-19 07:48:03,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333550268] [2023-11-19 07:48:03,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:03,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:48:03,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:03,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:48:03,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:48:05,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 385 [2023-11-19 07:48:05,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 170 flow. Second operand has 20 states, 20 states have (on average 164.1) internal successors, (3282), 20 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:05,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:05,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 385 [2023-11-19 07:48:05,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:06,972 INFO L124 PetriNetUnfolderBase]: 2300/3783 cut-off events. [2023-11-19 07:48:06,972 INFO L125 PetriNetUnfolderBase]: For 1325/1325 co-relation queries the response was YES. [2023-11-19 07:48:06,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9394 conditions, 3783 events. 2300/3783 cut-off events. For 1325/1325 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 19382 event pairs, 299 based on Foata normal form. 94/3519 useless extension candidates. Maximal degree in co-relation 9383. Up to 1745 conditions per place. [2023-11-19 07:48:07,002 INFO L140 encePairwiseOnDemand]: 376/385 looper letters, 203 selfloop transitions, 26 changer transitions 0/230 dead transitions. [2023-11-19 07:48:07,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 230 transitions, 1118 flow [2023-11-19 07:48:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:48:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:48:07,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2488 transitions. [2023-11-19 07:48:07,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46159554730983304 [2023-11-19 07:48:07,013 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2488 transitions. [2023-11-19 07:48:07,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2488 transitions. [2023-11-19 07:48:07,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:07,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2488 transitions. [2023-11-19 07:48:07,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 177.71428571428572) internal successors, (2488), 14 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 385.0) internal successors, (5775), 15 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,037 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 385.0) internal successors, (5775), 15 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,037 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 170 flow. Second operand 14 states and 2488 transitions. [2023-11-19 07:48:07,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 230 transitions, 1118 flow [2023-11-19 07:48:07,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 230 transitions, 1115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:07,046 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 386 flow [2023-11-19 07:48:07,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=386, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-11-19 07:48:07,047 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2023-11-19 07:48:07,048 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 386 flow [2023-11-19 07:48:07,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 164.1) internal successors, (3282), 20 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:07,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:07,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:07,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:48:07,272 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:07,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:07,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1780626027, now seen corresponding path program 1 times [2023-11-19 07:48:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:07,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210065509] [2023-11-19 07:48:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:07,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:07,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210065509] [2023-11-19 07:48:07,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210065509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:07,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:07,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:07,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418191774] [2023-11-19 07:48:07,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:07,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:07,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:07,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:07,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:07,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 385 [2023-11-19 07:48:07,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 386 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:07,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 385 [2023-11-19 07:48:07,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:07,645 INFO L124 PetriNetUnfolderBase]: 716/1343 cut-off events. [2023-11-19 07:48:07,645 INFO L125 PetriNetUnfolderBase]: For 983/983 co-relation queries the response was YES. [2023-11-19 07:48:07,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3628 conditions, 1343 events. 716/1343 cut-off events. For 983/983 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6080 event pairs, 97 based on Foata normal form. 62/1341 useless extension candidates. Maximal degree in co-relation 3610. Up to 1051 conditions per place. [2023-11-19 07:48:07,655 INFO L140 encePairwiseOnDemand]: 380/385 looper letters, 59 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2023-11-19 07:48:07,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 467 flow [2023-11-19 07:48:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2023-11-19 07:48:07,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-19 07:48:07,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2023-11-19 07:48:07,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2023-11-19 07:48:07,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:07,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2023-11-19 07:48:07,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,666 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 386 flow. Second operand 3 states and 567 transitions. [2023-11-19 07:48:07,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 467 flow [2023-11-19 07:48:07,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 431 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-19 07:48:07,675 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 289 flow [2023-11-19 07:48:07,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2023-11-19 07:48:07,677 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2023-11-19 07:48:07,677 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 289 flow [2023-11-19 07:48:07,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:07,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:07,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:48:07,695 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:07,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1176924997, now seen corresponding path program 1 times [2023-11-19 07:48:07,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:07,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493591838] [2023-11-19 07:48:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:07,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:08,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:08,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493591838] [2023-11-19 07:48:08,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493591838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:08,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:08,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:48:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866218090] [2023-11-19 07:48:08,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:08,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:48:08,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:48:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:48:09,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 385 [2023-11-19 07:48:09,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 289 flow. Second operand has 13 states, 13 states have (on average 152.53846153846155) internal successors, (1983), 13 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:09,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:09,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 385 [2023-11-19 07:48:09,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:10,436 INFO L124 PetriNetUnfolderBase]: 734/1375 cut-off events. [2023-11-19 07:48:10,437 INFO L125 PetriNetUnfolderBase]: For 528/528 co-relation queries the response was YES. [2023-11-19 07:48:10,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 1375 events. 734/1375 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6199 event pairs, 123 based on Foata normal form. 0/1357 useless extension candidates. Maximal degree in co-relation 3675. Up to 966 conditions per place. [2023-11-19 07:48:10,446 INFO L140 encePairwiseOnDemand]: 372/385 looper letters, 111 selfloop transitions, 13 changer transitions 0/125 dead transitions. [2023-11-19 07:48:10,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 125 transitions, 699 flow [2023-11-19 07:48:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:48:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:48:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1926 transitions. [2023-11-19 07:48:10,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41688311688311686 [2023-11-19 07:48:10,456 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1926 transitions. [2023-11-19 07:48:10,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1926 transitions. [2023-11-19 07:48:10,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:10,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1926 transitions. [2023-11-19 07:48:10,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.5) internal successors, (1926), 12 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:10,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 385.0) internal successors, (5005), 13 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:10,473 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 385.0) internal successors, (5005), 13 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:10,473 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 289 flow. Second operand 12 states and 1926 transitions. [2023-11-19 07:48:10,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 125 transitions, 699 flow [2023-11-19 07:48:10,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 125 transitions, 686 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:10,480 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 349 flow [2023-11-19 07:48:10,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=349, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2023-11-19 07:48:10,481 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 33 predicate places. [2023-11-19 07:48:10,481 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 349 flow [2023-11-19 07:48:10,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 152.53846153846155) internal successors, (1983), 13 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:10,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:10,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:10,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:48:10,483 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:10,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:10,483 INFO L85 PathProgramCache]: Analyzing trace with hash -311259372, now seen corresponding path program 1 times [2023-11-19 07:48:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:10,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575147298] [2023-11-19 07:48:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:10,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:10,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:10,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575147298] [2023-11-19 07:48:10,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575147298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:10,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:10,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:48:10,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392520993] [2023-11-19 07:48:10,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:10,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:48:10,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:10,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:48:10,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:48:10,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 385 [2023-11-19 07:48:10,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:10,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:10,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 385 [2023-11-19 07:48:10,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:11,315 INFO L124 PetriNetUnfolderBase]: 722/1347 cut-off events. [2023-11-19 07:48:11,316 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2023-11-19 07:48:11,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3859 conditions, 1347 events. 722/1347 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6071 event pairs, 249 based on Foata normal form. 0/1329 useless extension candidates. Maximal degree in co-relation 3836. Up to 613 conditions per place. [2023-11-19 07:48:11,327 INFO L140 encePairwiseOnDemand]: 374/385 looper letters, 56 selfloop transitions, 26 changer transitions 0/83 dead transitions. [2023-11-19 07:48:11,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 555 flow [2023-11-19 07:48:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:48:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:48:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1196 transitions. [2023-11-19 07:48:11,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437847866419295 [2023-11-19 07:48:11,333 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1196 transitions. [2023-11-19 07:48:11,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1196 transitions. [2023-11-19 07:48:11,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:11,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1196 transitions. [2023-11-19 07:48:11,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 170.85714285714286) internal successors, (1196), 7 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:11,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 385.0) internal successors, (3080), 8 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:11,344 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 385.0) internal successors, (3080), 8 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:11,345 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 349 flow. Second operand 7 states and 1196 transitions. [2023-11-19 07:48:11,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 555 flow [2023-11-19 07:48:11,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 544 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 07:48:11,352 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 388 flow [2023-11-19 07:48:11,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2023-11-19 07:48:11,353 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 33 predicate places. [2023-11-19 07:48:11,354 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 388 flow [2023-11-19 07:48:11,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:11,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:11,355 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] [2023-11-19 07:48:11,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:48:11,355 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:11,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash 924248762, now seen corresponding path program 1 times [2023-11-19 07:48:11,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:11,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516636347] [2023-11-19 07:48:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:11,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:11,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:11,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516636347] [2023-11-19 07:48:11,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516636347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:11,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:11,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:11,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385497166] [2023-11-19 07:48:11,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:11,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:11,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:11,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:11,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:11,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 385 [2023-11-19 07:48:11,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:11,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:11,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 385 [2023-11-19 07:48:11,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:11,777 INFO L124 PetriNetUnfolderBase]: 959/1824 cut-off events. [2023-11-19 07:48:11,777 INFO L125 PetriNetUnfolderBase]: For 1545/1545 co-relation queries the response was YES. [2023-11-19 07:48:11,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5500 conditions, 1824 events. 959/1824 cut-off events. For 1545/1545 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 9146 event pairs, 548 based on Foata normal form. 84/1872 useless extension candidates. Maximal degree in co-relation 5477. Up to 1278 conditions per place. [2023-11-19 07:48:11,793 INFO L140 encePairwiseOnDemand]: 381/385 looper letters, 112 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2023-11-19 07:48:11,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 116 transitions, 934 flow [2023-11-19 07:48:11,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-11-19 07:48:11,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2023-11-19 07:48:11,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-11-19 07:48:11,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-11-19 07:48:11,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:11,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-11-19 07:48:11,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:11,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:11,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:11,805 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 388 flow. Second operand 3 states and 590 transitions. [2023-11-19 07:48:11,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 116 transitions, 934 flow [2023-11-19 07:48:11,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 875 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 07:48:11,819 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 377 flow [2023-11-19 07:48:11,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=377, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2023-11-19 07:48:11,820 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2023-11-19 07:48:11,820 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 377 flow [2023-11-19 07:48:11,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:11,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:11,821 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] [2023-11-19 07:48:11,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:48:11,822 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:11,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:11,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1448477443, now seen corresponding path program 1 times [2023-11-19 07:48:11,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:11,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314766645] [2023-11-19 07:48:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:11,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:12,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314766645] [2023-11-19 07:48:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314766645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:12,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:12,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 07:48:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500675535] [2023-11-19 07:48:12,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:12,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:48:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:48:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:48:14,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 385 [2023-11-19 07:48:14,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 377 flow. Second operand has 16 states, 16 states have (on average 138.375) internal successors, (2214), 16 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:14,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:14,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 385 [2023-11-19 07:48:14,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:16,466 INFO L124 PetriNetUnfolderBase]: 1330/2538 cut-off events. [2023-11-19 07:48:16,466 INFO L125 PetriNetUnfolderBase]: For 2000/2000 co-relation queries the response was YES. [2023-11-19 07:48:16,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7777 conditions, 2538 events. 1330/2538 cut-off events. For 2000/2000 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 13735 event pairs, 336 based on Foata normal form. 16/2554 useless extension candidates. Maximal degree in co-relation 7753. Up to 1615 conditions per place. [2023-11-19 07:48:16,487 INFO L140 encePairwiseOnDemand]: 365/385 looper letters, 167 selfloop transitions, 46 changer transitions 0/214 dead transitions. [2023-11-19 07:48:16,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 214 transitions, 1383 flow [2023-11-19 07:48:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:48:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-19 07:48:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3741 transitions. [2023-11-19 07:48:16,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3737262737262737 [2023-11-19 07:48:16,503 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3741 transitions. [2023-11-19 07:48:16,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3741 transitions. [2023-11-19 07:48:16,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:16,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3741 transitions. [2023-11-19 07:48:16,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 143.8846153846154) internal successors, (3741), 26 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:16,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 385.0) internal successors, (10395), 27 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:16,536 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 385.0) internal successors, (10395), 27 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:16,536 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 377 flow. Second operand 26 states and 3741 transitions. [2023-11-19 07:48:16,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 214 transitions, 1383 flow [2023-11-19 07:48:16,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 214 transitions, 1370 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:16,550 INFO L231 Difference]: Finished difference. Result has 118 places, 107 transitions, 791 flow [2023-11-19 07:48:16,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=791, PETRI_PLACES=118, PETRI_TRANSITIONS=107} [2023-11-19 07:48:16,551 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 69 predicate places. [2023-11-19 07:48:16,551 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 107 transitions, 791 flow [2023-11-19 07:48:16,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 138.375) internal successors, (2214), 16 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:16,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:16,552 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] [2023-11-19 07:48:16,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 07:48:16,553 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:16,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash 466239207, now seen corresponding path program 2 times [2023-11-19 07:48:16,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:16,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125907194] [2023-11-19 07:48:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:16,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:17,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:17,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125907194] [2023-11-19 07:48:17,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125907194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:17,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:17,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 07:48:17,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171750787] [2023-11-19 07:48:17,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:17,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:48:17,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:48:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:48:19,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 385 [2023-11-19 07:48:19,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 107 transitions, 791 flow. Second operand has 16 states, 16 states have (on average 138.375) internal successors, (2214), 16 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:19,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:19,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 385 [2023-11-19 07:48:19,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:21,078 INFO L124 PetriNetUnfolderBase]: 1859/3539 cut-off events. [2023-11-19 07:48:21,078 INFO L125 PetriNetUnfolderBase]: For 4316/4316 co-relation queries the response was YES. [2023-11-19 07:48:21,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12196 conditions, 3539 events. 1859/3539 cut-off events. For 4316/4316 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 19820 event pairs, 531 based on Foata normal form. 16/3555 useless extension candidates. Maximal degree in co-relation 12158. Up to 1997 conditions per place. [2023-11-19 07:48:21,108 INFO L140 encePairwiseOnDemand]: 366/385 looper letters, 186 selfloop transitions, 58 changer transitions 0/245 dead transitions. [2023-11-19 07:48:21,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 245 transitions, 1966 flow [2023-11-19 07:48:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:48:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:48:21,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2624 transitions. [2023-11-19 07:48:21,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37864357864357867 [2023-11-19 07:48:21,116 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2624 transitions. [2023-11-19 07:48:21,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2624 transitions. [2023-11-19 07:48:21,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:21,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2624 transitions. [2023-11-19 07:48:21,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:21,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 385.0) internal successors, (7315), 19 states have internal predecessors, (7315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:21,137 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 385.0) internal successors, (7315), 19 states have internal predecessors, (7315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:21,138 INFO L175 Difference]: Start difference. First operand has 118 places, 107 transitions, 791 flow. Second operand 18 states and 2624 transitions. [2023-11-19 07:48:21,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 245 transitions, 1966 flow [2023-11-19 07:48:21,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 245 transitions, 1877 flow, removed 37 selfloop flow, removed 4 redundant places. [2023-11-19 07:48:21,173 INFO L231 Difference]: Finished difference. Result has 142 places, 145 transitions, 1287 flow [2023-11-19 07:48:21,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1287, PETRI_PLACES=142, PETRI_TRANSITIONS=145} [2023-11-19 07:48:21,174 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 93 predicate places. [2023-11-19 07:48:21,174 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 145 transitions, 1287 flow [2023-11-19 07:48:21,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 138.375) internal successors, (2214), 16 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:21,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:21,175 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] [2023-11-19 07:48:21,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 07:48:21,176 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:21,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:21,176 INFO L85 PathProgramCache]: Analyzing trace with hash 932943427, now seen corresponding path program 3 times [2023-11-19 07:48:21,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:21,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761234660] [2023-11-19 07:48:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:21,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:22,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:22,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761234660] [2023-11-19 07:48:22,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761234660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:22,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:22,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 07:48:22,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256494006] [2023-11-19 07:48:22,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:22,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:48:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:48:22,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:48:23,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 385 [2023-11-19 07:48:23,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 145 transitions, 1287 flow. Second operand has 16 states, 16 states have (on average 138.375) internal successors, (2214), 16 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:23,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 385 [2023-11-19 07:48:23,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:25,200 INFO L124 PetriNetUnfolderBase]: 1883/3590 cut-off events. [2023-11-19 07:48:25,200 INFO L125 PetriNetUnfolderBase]: For 6185/6185 co-relation queries the response was YES. [2023-11-19 07:48:25,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13525 conditions, 3590 events. 1883/3590 cut-off events. For 6185/6185 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 20131 event pairs, 417 based on Foata normal form. 12/3594 useless extension candidates. Maximal degree in co-relation 13476. Up to 2395 conditions per place. [2023-11-19 07:48:25,233 INFO L140 encePairwiseOnDemand]: 369/385 looper letters, 173 selfloop transitions, 41 changer transitions 0/215 dead transitions. [2023-11-19 07:48:25,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 215 transitions, 1993 flow [2023-11-19 07:48:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:48:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:48:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2174 transitions. [2023-11-19 07:48:25,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3764502164502164 [2023-11-19 07:48:25,239 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2174 transitions. [2023-11-19 07:48:25,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2174 transitions. [2023-11-19 07:48:25,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:25,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2174 transitions. [2023-11-19 07:48:25,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 144.93333333333334) internal successors, (2174), 15 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:25,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 385.0) internal successors, (6160), 16 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:25,256 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 385.0) internal successors, (6160), 16 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:25,257 INFO L175 Difference]: Start difference. First operand has 142 places, 145 transitions, 1287 flow. Second operand 15 states and 2174 transitions. [2023-11-19 07:48:25,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 215 transitions, 1993 flow [2023-11-19 07:48:25,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 215 transitions, 1956 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-19 07:48:25,310 INFO L231 Difference]: Finished difference. Result has 154 places, 156 transitions, 1470 flow [2023-11-19 07:48:25,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1470, PETRI_PLACES=154, PETRI_TRANSITIONS=156} [2023-11-19 07:48:25,310 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 105 predicate places. [2023-11-19 07:48:25,311 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 156 transitions, 1470 flow [2023-11-19 07:48:25,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 138.375) internal successors, (2214), 16 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:25,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:25,312 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 07:48:25,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 07:48:25,312 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:25,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:25,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1365548375, now seen corresponding path program 1 times [2023-11-19 07:48:25,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:25,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243370113] [2023-11-19 07:48:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:25,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:25,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:25,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243370113] [2023-11-19 07:48:25,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243370113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:25,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774911579] [2023-11-19 07:48:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:25,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:25,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:25,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:25,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:48:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:25,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:48:25,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:25,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:25,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774911579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:25,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:25,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-19 07:48:25,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905086960] [2023-11-19 07:48:25,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:25,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:48:25,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:48:25,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:48:25,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 385 [2023-11-19 07:48:25,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 156 transitions, 1470 flow. Second operand has 14 states, 14 states have (on average 174.71428571428572) internal successors, (2446), 14 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:25,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:25,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 385 [2023-11-19 07:48:25,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:27,077 INFO L124 PetriNetUnfolderBase]: 2465/4692 cut-off events. [2023-11-19 07:48:27,078 INFO L125 PetriNetUnfolderBase]: For 9885/9885 co-relation queries the response was YES. [2023-11-19 07:48:27,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18133 conditions, 4692 events. 2465/4692 cut-off events. For 9885/9885 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 26414 event pairs, 661 based on Foata normal form. 38/4722 useless extension candidates. Maximal degree in co-relation 18080. Up to 1397 conditions per place. [2023-11-19 07:48:27,125 INFO L140 encePairwiseOnDemand]: 379/385 looper letters, 270 selfloop transitions, 43 changer transitions 0/314 dead transitions. [2023-11-19 07:48:27,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 314 transitions, 3018 flow [2023-11-19 07:48:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:48:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:48:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2071 transitions. [2023-11-19 07:48:27,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48902007083825266 [2023-11-19 07:48:27,131 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2071 transitions. [2023-11-19 07:48:27,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2071 transitions. [2023-11-19 07:48:27,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:27,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2071 transitions. [2023-11-19 07:48:27,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 188.27272727272728) internal successors, (2071), 11 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:27,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 385.0) internal successors, (4620), 12 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:27,145 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 385.0) internal successors, (4620), 12 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:27,146 INFO L175 Difference]: Start difference. First operand has 154 places, 156 transitions, 1470 flow. Second operand 11 states and 2071 transitions. [2023-11-19 07:48:27,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 314 transitions, 3018 flow [2023-11-19 07:48:27,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 314 transitions, 2955 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-19 07:48:27,222 INFO L231 Difference]: Finished difference. Result has 157 places, 174 transitions, 1715 flow [2023-11-19 07:48:27,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1715, PETRI_PLACES=157, PETRI_TRANSITIONS=174} [2023-11-19 07:48:27,223 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 108 predicate places. [2023-11-19 07:48:27,224 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 174 transitions, 1715 flow [2023-11-19 07:48:27,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 174.71428571428572) internal successors, (2446), 14 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:27,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:27,225 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] [2023-11-19 07:48:27,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:27,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:27,440 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:27,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:27,441 INFO L85 PathProgramCache]: Analyzing trace with hash -820385453, now seen corresponding path program 1 times [2023-11-19 07:48:27,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:27,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093825871] [2023-11-19 07:48:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:27,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:27,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:27,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093825871] [2023-11-19 07:48:27,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093825871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:27,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259392765] [2023-11-19 07:48:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:27,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:27,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:27,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:27,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:48:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:27,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:48:27,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:27,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:27,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259392765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:27,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:27,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 07:48:27,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545638408] [2023-11-19 07:48:27,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:27,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:48:27,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:27,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:48:27,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:48:27,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 385 [2023-11-19 07:48:27,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 174 transitions, 1715 flow. Second operand has 7 states, 7 states have (on average 179.14285714285714) internal successors, (1254), 7 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:27,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:27,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 385 [2023-11-19 07:48:27,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:29,833 INFO L124 PetriNetUnfolderBase]: 4599/9010 cut-off events. [2023-11-19 07:48:29,833 INFO L125 PetriNetUnfolderBase]: For 21449/21449 co-relation queries the response was YES. [2023-11-19 07:48:29,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35771 conditions, 9010 events. 4599/9010 cut-off events. For 21449/21449 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 62145 event pairs, 989 based on Foata normal form. 890/9886 useless extension candidates. Maximal degree in co-relation 35714. Up to 2250 conditions per place. [2023-11-19 07:48:29,912 INFO L140 encePairwiseOnDemand]: 380/385 looper letters, 528 selfloop transitions, 30 changer transitions 0/559 dead transitions. [2023-11-19 07:48:29,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 559 transitions, 6721 flow [2023-11-19 07:48:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:48:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:48:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1184 transitions. [2023-11-19 07:48:29,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125541125541125 [2023-11-19 07:48:29,916 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1184 transitions. [2023-11-19 07:48:29,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1184 transitions. [2023-11-19 07:48:29,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:29,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1184 transitions. [2023-11-19 07:48:29,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.33333333333334) internal successors, (1184), 6 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:29,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 385.0) internal successors, (2695), 7 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:29,922 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 385.0) internal successors, (2695), 7 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:29,922 INFO L175 Difference]: Start difference. First operand has 157 places, 174 transitions, 1715 flow. Second operand 6 states and 1184 transitions. [2023-11-19 07:48:29,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 559 transitions, 6721 flow [2023-11-19 07:48:30,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 559 transitions, 6423 flow, removed 144 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:30,301 INFO L231 Difference]: Finished difference. Result has 165 places, 190 transitions, 1943 flow [2023-11-19 07:48:30,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1943, PETRI_PLACES=165, PETRI_TRANSITIONS=190} [2023-11-19 07:48:30,305 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 116 predicate places. [2023-11-19 07:48:30,305 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 190 transitions, 1943 flow [2023-11-19 07:48:30,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.14285714285714) internal successors, (1254), 7 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:30,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:30,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:30,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:30,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:30,510 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:48:30,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash 56403856, now seen corresponding path program 1 times [2023-11-19 07:48:30,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:30,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730462908] [2023-11-19 07:48:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:30,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730462908] [2023-11-19 07:48:30,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730462908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972633831] [2023-11-19 07:48:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:30,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:30,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:30,961 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:30,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42bb2e44-2a7f-447a-8b9c-aae5319f6bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:48:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:31,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-19 07:48:31,111 INFO L285 TraceCheckSpWp]: Computing forward predicates...