./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack-2.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_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/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_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/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_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:29,603 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:29,750 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:50:29,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:29,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:29,781 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:29,782 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:29,783 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:29,784 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:29,784 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:29,785 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:29,786 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:29,786 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:29,787 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:29,788 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:29,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:29,789 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:29,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:29,791 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:50:29,791 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:50:29,792 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:50:29,793 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:29,793 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:50:29,794 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:50:29,794 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:29,795 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:29,795 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:29,796 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:29,797 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:29,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:29,798 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:29,798 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:29,798 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:29,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:29,800 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:29,801 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:29,801 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:29,801 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:29,802 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_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2023-11-19 07:50:30,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:30,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:30,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:30,136 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:30,137 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:30,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/stack-2.i [2023-11-19 07:50:33,182 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:33,550 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:33,551 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/sv-benchmarks/c/pthread/stack-2.i [2023-11-19 07:50:33,576 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/data/f60b6c283/24ead0a82dc543d098ee25bcd984f442/FLAG801ac6164 [2023-11-19 07:50:33,595 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/data/f60b6c283/24ead0a82dc543d098ee25bcd984f442 [2023-11-19 07:50:33,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:33,605 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:33,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:33,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:33,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:33,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:33" (1/1) ... [2023-11-19 07:50:33,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad49e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:33, skipping insertion in model container [2023-11-19 07:50:33,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:33" (1/1) ... [2023-11-19 07:50:33,684 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:34,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:34,318 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:34,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:34,497 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:34,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34 WrapperNode [2023-11-19 07:50:34,498 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:34,499 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:34,499 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:34,499 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:34,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,541 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,591 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 165 [2023-11-19 07:50:34,591 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:34,592 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:34,592 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:34,592 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:34,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,617 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,628 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,643 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,648 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:34,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:34,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:34,656 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:34,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (1/1) ... [2023-11-19 07:50:34,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:34,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:34,697 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:34,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:50:34,753 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:50:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:50:34,753 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:50:34,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:50:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:50:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:50:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:50:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:50:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:34,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:34,758 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 07:50:34,934 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:34,936 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:35,297 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:35,310 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:35,315 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:50:35,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:35 BoogieIcfgContainer [2023-11-19 07:50:35,319 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:35,323 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:35,323 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:35,326 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:35,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:33" (1/3) ... [2023-11-19 07:50:35,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6cc963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:35, skipping insertion in model container [2023-11-19 07:50:35,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:34" (2/3) ... [2023-11-19 07:50:35,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6cc963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:35, skipping insertion in model container [2023-11-19 07:50:35,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:35" (3/3) ... [2023-11-19 07:50:35,329 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-11-19 07:50:35,349 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:35,350 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-19 07:50:35,350 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:50:35,463 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:50:35,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 196 transitions, 406 flow [2023-11-19 07:50:35,593 INFO L124 PetriNetUnfolderBase]: 12/194 cut-off events. [2023-11-19 07:50:35,593 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:35,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 194 events. 12/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 551 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 144. Up to 3 conditions per place. [2023-11-19 07:50:35,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 196 transitions, 406 flow [2023-11-19 07:50:35,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 189 transitions, 390 flow [2023-11-19 07:50:35,616 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:35,626 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 189 transitions, 390 flow [2023-11-19 07:50:35,629 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 189 transitions, 390 flow [2023-11-19 07:50:35,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 189 transitions, 390 flow [2023-11-19 07:50:35,766 INFO L124 PetriNetUnfolderBase]: 12/189 cut-off events. [2023-11-19 07:50:35,775 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:35,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 189 events. 12/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 536 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 07:50:35,797 INFO L119 LiptonReduction]: Number of co-enabled transitions 11290 [2023-11-19 07:50:42,737 INFO L134 LiptonReduction]: Checked pairs total: 17564 [2023-11-19 07:50:42,737 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-11-19 07:50:42,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:42,776 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;@5db30af1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:42,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-19 07:50:42,781 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:42,781 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:50:42,781 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:42,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:42,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:50:42,783 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 07:50:42,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:42,789 INFO L85 PathProgramCache]: Analyzing trace with hash 814, now seen corresponding path program 1 times [2023-11-19 07:50:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321122709] [2023-11-19 07:50:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:42,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:42,947 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 07:50:42,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:42,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321122709] [2023-11-19 07:50:42,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321122709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:42,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:42,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:50:42,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174622992] [2023-11-19 07:50:42,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:42,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:42,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:42,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:43,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 396 [2023-11-19 07:50:43,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 183.5) internal successors, (367), 2 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:43,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:43,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 396 [2023-11-19 07:50:43,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:43,429 INFO L124 PetriNetUnfolderBase]: 1445/2252 cut-off events. [2023-11-19 07:50:43,430 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-19 07:50:43,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 2252 events. 1445/2252 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10568 event pairs, 1169 based on Foata normal form. 0/1244 useless extension candidates. Maximal degree in co-relation 4252. Up to 2225 conditions per place. [2023-11-19 07:50:43,458 INFO L140 encePairwiseOnDemand]: 394/396 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-11-19 07:50:43,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-11-19 07:50:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:50:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 412 transitions. [2023-11-19 07:50:43,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202020202020202 [2023-11-19 07:50:43,488 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 412 transitions. [2023-11-19 07:50:43,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 412 transitions. [2023-11-19 07:50:43,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:43,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 412 transitions. [2023-11-19 07:50:43,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 206.0) internal successors, (412), 2 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 07:50:43,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 396.0) internal successors, (1188), 3 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states 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 07:50:43,510 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 396.0) internal successors, (1188), 3 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states 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 07:50:43,512 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 412 transitions. [2023-11-19 07:50:43,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-11-19 07:50:43,518 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 07:50:43,521 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-11-19 07:50:43,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, 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 07:50:43,528 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-19 07:50:43,529 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-11-19 07:50:43,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 183.5) internal successors, (367), 2 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:43,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:43,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:50:43,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:50:43,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:50:43,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash 799034, now seen corresponding path program 1 times [2023-11-19 07:50:43,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:43,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387107623] [2023-11-19 07:50:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:43,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:43,764 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 07:50:43,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:43,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387107623] [2023-11-19 07:50:43,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387107623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:43,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:43,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:43,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193116574] [2023-11-19 07:50:43,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:43,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:43,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:43,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:43,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 396 [2023-11-19 07:50:43,822 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 07:50:43,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:43,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 396 [2023-11-19 07:50:43,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:44,163 INFO L124 PetriNetUnfolderBase]: 1416/2196 cut-off events. [2023-11-19 07:50:44,163 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:50:44,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4381 conditions, 2196 events. 1416/2196 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10200 event pairs, 1145 based on Foata normal form. 0/1225 useless extension candidates. Maximal degree in co-relation 4378. Up to 2168 conditions per place. [2023-11-19 07:50:44,183 INFO L140 encePairwiseOnDemand]: 392/396 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-19 07:50:44,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-11-19 07:50:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2023-11-19 07:50:44,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739057239057239 [2023-11-19 07:50:44,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2023-11-19 07:50:44,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2023-11-19 07:50:44,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:44,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2023-11-19 07:50:44,191 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 07:50:44,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:44,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:44,198 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 563 transitions. [2023-11-19 07:50:44,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-11-19 07:50:44,199 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 07:50:44,202 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-11-19 07:50:44,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, 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 07:50:44,206 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-19 07:50:44,206 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-11-19 07:50:44,207 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 07:50:44,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:44,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:50:44,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:50:44,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:50:44,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:44,210 INFO L85 PathProgramCache]: Analyzing trace with hash 799035, now seen corresponding path program 1 times [2023-11-19 07:50:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:44,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036825081] [2023-11-19 07:50:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,349 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 07:50:44,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:44,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036825081] [2023-11-19 07:50:44,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036825081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:44,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:44,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:44,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687551641] [2023-11-19 07:50:44,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:44,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:44,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:44,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:44,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:44,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 396 [2023-11-19 07:50:44,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 07:50:44,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:44,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 396 [2023-11-19 07:50:44,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:44,666 INFO L124 PetriNetUnfolderBase]: 1387/2140 cut-off events. [2023-11-19 07:50:44,667 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:50:44,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 2140 events. 1387/2140 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9821 event pairs, 1121 based on Foata normal form. 0/1206 useless extension candidates. Maximal degree in co-relation 4269. Up to 2113 conditions per place. [2023-11-19 07:50:44,685 INFO L140 encePairwiseOnDemand]: 392/396 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-11-19 07:50:44,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-11-19 07:50:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-11-19 07:50:44,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2023-11-19 07:50:44,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-11-19 07:50:44,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-11-19 07:50:44,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:44,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-11-19 07:50:44,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:44,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:44,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:44,698 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 573 transitions. [2023-11-19 07:50:44,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-11-19 07:50:44,699 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 07:50:44,700 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-11-19 07:50:44,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, 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 07:50:44,701 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-11-19 07:50:44,702 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-11-19 07:50:44,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 07:50:44,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:44,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:50:44,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:50:44,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:50:44,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash 767889424, now seen corresponding path program 1 times [2023-11-19 07:50:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:44,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698618523] [2023-11-19 07:50:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,867 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 07:50:44,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:44,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698618523] [2023-11-19 07:50:44,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698618523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:44,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:44,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:44,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979635243] [2023-11-19 07:50:44,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:44,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:44,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:44,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:44,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 396 [2023-11-19 07:50:44,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 07:50:44,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:44,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 396 [2023-11-19 07:50:44,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:45,202 INFO L124 PetriNetUnfolderBase]: 1013/1592 cut-off events. [2023-11-19 07:50:45,203 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:50:45,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3183 conditions, 1592 events. 1013/1592 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7038 event pairs, 811 based on Foata normal form. 0/970 useless extension candidates. Maximal degree in co-relation 3179. Up to 1571 conditions per place. [2023-11-19 07:50:45,215 INFO L140 encePairwiseOnDemand]: 393/396 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-11-19 07:50:45,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-11-19 07:50:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-11-19 07:50:45,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47558922558922556 [2023-11-19 07:50:45,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-11-19 07:50:45,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-11-19 07:50:45,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:45,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-11-19 07:50:45,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states 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 07:50:45,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:45,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:45,226 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 565 transitions. [2023-11-19 07:50:45,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-11-19 07:50:45,227 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 07:50:45,228 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-11-19 07:50:45,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, 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 07:50:45,230 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-11-19 07:50:45,231 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-11-19 07:50:45,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 07:50:45,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:45,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:50:45,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:50:45,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:50:45,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash 767889425, now seen corresponding path program 1 times [2023-11-19 07:50:45,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:45,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616567358] [2023-11-19 07:50:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:45,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,355 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 07:50:45,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:45,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616567358] [2023-11-19 07:50:45,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616567358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:45,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:45,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:45,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472496925] [2023-11-19 07:50:45,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:45,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:45,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:45,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 396 [2023-11-19 07:50:45,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 07:50:45,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:45,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 396 [2023-11-19 07:50:45,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:45,599 INFO L124 PetriNetUnfolderBase]: 639/1044 cut-off events. [2023-11-19 07:50:45,599 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:50:45,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 1044 events. 639/1044 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4433 event pairs, 501 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 2089. Up to 1029 conditions per place. [2023-11-19 07:50:45,607 INFO L140 encePairwiseOnDemand]: 393/396 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-11-19 07:50:45,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-11-19 07:50:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-11-19 07:50:45,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2023-11-19 07:50:45,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-11-19 07:50:45,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-11-19 07:50:45,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:45,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-11-19 07:50:45,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 07:50:45,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:45,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:45,618 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 546 transitions. [2023-11-19 07:50:45,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-11-19 07:50:45,619 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 07:50:45,620 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-11-19 07:50:45,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, 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 07:50:45,621 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-11-19 07:50:45,621 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-11-19 07:50:45,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 07:50:45,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:45,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:50:45,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:50:45,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:50:45,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1966031460, now seen corresponding path program 1 times [2023-11-19 07:50:45,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:45,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975458919] [2023-11-19 07:50:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:45,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,893 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 07:50:45,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:45,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975458919] [2023-11-19 07:50:45,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975458919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:45,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:45,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:45,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499778416] [2023-11-19 07:50:45,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:45,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:45,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:45,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:46,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 396 [2023-11-19 07:50:46,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 07:50:46,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:46,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 396 [2023-11-19 07:50:46,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:46,381 INFO L124 PetriNetUnfolderBase]: 946/1563 cut-off events. [2023-11-19 07:50:46,381 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-19 07:50:46,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 1563 events. 946/1563 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7022 event pairs, 147 based on Foata normal form. 0/1141 useless extension candidates. Maximal degree in co-relation 3117. Up to 1060 conditions per place. [2023-11-19 07:50:46,394 INFO L140 encePairwiseOnDemand]: 390/396 looper letters, 75 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-11-19 07:50:46,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 81 transitions, 336 flow [2023-11-19 07:50:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:50:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 786 transitions. [2023-11-19 07:50:46,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2023-11-19 07:50:46,398 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 786 transitions. [2023-11-19 07:50:46,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 786 transitions. [2023-11-19 07:50:46,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:46,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 786 transitions. [2023-11-19 07:50:46,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 07:50:46,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states 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 07:50:46,408 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states 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 07:50:46,408 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 4 states and 786 transitions. [2023-11-19 07:50:46,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 81 transitions, 336 flow [2023-11-19 07:50:46,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 81 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:50:46,411 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 116 flow [2023-11-19 07:50:46,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, 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=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-11-19 07:50:46,413 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2023-11-19 07:50:46,413 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 116 flow [2023-11-19 07:50:46,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 07:50:46,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:46,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:50:46,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:50:46,414 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 07:50:46,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:46,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1966031459, now seen corresponding path program 1 times [2023-11-19 07:50:46,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:46,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876505130] [2023-11-19 07:50:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:46,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,537 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 07:50:46,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:46,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876505130] [2023-11-19 07:50:46,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876505130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:46,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:46,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:46,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208576284] [2023-11-19 07:50:46,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:46,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:46,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:46,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 396 [2023-11-19 07:50:46,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 07:50:46,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:46,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 396 [2023-11-19 07:50:46,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:46,917 INFO L124 PetriNetUnfolderBase]: 862/1435 cut-off events. [2023-11-19 07:50:46,917 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-11-19 07:50:46,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3119 conditions, 1435 events. 862/1435 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6532 event pairs, 436 based on Foata normal form. 0/1115 useless extension candidates. Maximal degree in co-relation 3113. Up to 907 conditions per place. [2023-11-19 07:50:46,931 INFO L140 encePairwiseOnDemand]: 391/396 looper letters, 54 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-11-19 07:50:46,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 275 flow [2023-11-19 07:50:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:50:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2023-11-19 07:50:46,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779040404040404 [2023-11-19 07:50:46,936 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2023-11-19 07:50:46,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2023-11-19 07:50:46,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:46,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2023-11-19 07:50:46,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 07:50:46,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states 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 07:50:46,945 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states 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 07:50:46,945 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 116 flow. Second operand 4 states and 757 transitions. [2023-11-19 07:50:46,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 275 flow [2023-11-19 07:50:46,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 275 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:46,949 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 126 flow [2023-11-19 07:50:46,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-19 07:50:46,950 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-19 07:50:46,951 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 126 flow [2023-11-19 07:50:46,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 07:50:46,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:46,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:46,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:50:46,952 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:50:46,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1498619343, now seen corresponding path program 1 times [2023-11-19 07:50:46,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:46,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997110266] [2023-11-19 07:50:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:46,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,007 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 07:50:47,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:47,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997110266] [2023-11-19 07:50:47,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997110266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:47,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:47,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:47,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685361271] [2023-11-19 07:50:47,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:47,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:47,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:47,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:47,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:47,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 396 [2023-11-19 07:50:47,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 126 flow. Second operand has 3 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 07:50:47,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:47,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 396 [2023-11-19 07:50:47,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:47,200 INFO L124 PetriNetUnfolderBase]: 706/1183 cut-off events. [2023-11-19 07:50:47,200 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2023-11-19 07:50:47,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 1183 events. 706/1183 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4694 event pairs, 312 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 2638. Up to 885 conditions per place. [2023-11-19 07:50:47,211 INFO L140 encePairwiseOnDemand]: 393/396 looper letters, 55 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-11-19 07:50:47,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 271 flow [2023-11-19 07:50:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-11-19 07:50:47,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033670033670034 [2023-11-19 07:50:47,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-11-19 07:50:47,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-11-19 07:50:47,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:47,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-11-19 07:50:47,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 07:50:47,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:47,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:47,221 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 126 flow. Second operand 3 states and 598 transitions. [2023-11-19 07:50:47,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 271 flow [2023-11-19 07:50:47,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 253 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-19 07:50:47,225 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 112 flow [2023-11-19 07:50:47,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-11-19 07:50:47,226 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-19 07:50:47,226 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 112 flow [2023-11-19 07:50:47,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 07:50:47,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:47,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:47,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:50:47,228 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:50:47,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash 279004211, now seen corresponding path program 1 times [2023-11-19 07:50:47,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:47,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561556855] [2023-11-19 07:50:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,277 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 07:50:47,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:47,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561556855] [2023-11-19 07:50:47,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561556855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:47,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:47,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:47,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117165185] [2023-11-19 07:50:47,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:47,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:47,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 396 [2023-11-19 07:50:47,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 112 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 07:50:47,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:47,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 396 [2023-11-19 07:50:47,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:47,493 INFO L124 PetriNetUnfolderBase]: 737/1230 cut-off events. [2023-11-19 07:50:47,494 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-19 07:50:47,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2729 conditions, 1230 events. 737/1230 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5003 event pairs, 530 based on Foata normal form. 42/1062 useless extension candidates. Maximal degree in co-relation 2722. Up to 1100 conditions per place. [2023-11-19 07:50:47,503 INFO L140 encePairwiseOnDemand]: 393/396 looper letters, 56 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-11-19 07:50:47,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 277 flow [2023-11-19 07:50:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-11-19 07:50:47,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008417508417509 [2023-11-19 07:50:47,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-11-19 07:50:47,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-11-19 07:50:47,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:47,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-11-19 07:50:47,509 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 07:50:47,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:47,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:47,513 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 112 flow. Second operand 3 states and 595 transitions. [2023-11-19 07:50:47,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 277 flow [2023-11-19 07:50:47,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 275 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:47,516 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 130 flow [2023-11-19 07:50:47,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-11-19 07:50:47,517 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-11-19 07:50:47,517 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 130 flow [2023-11-19 07:50:47,518 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 07:50:47,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:47,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:47,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:50:47,518 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:50:47,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:47,519 INFO L85 PathProgramCache]: Analyzing trace with hash -973413164, now seen corresponding path program 1 times [2023-11-19 07:50:47,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:47,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269358980] [2023-11-19 07:50:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,561 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 07:50:47,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:47,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269358980] [2023-11-19 07:50:47,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269358980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:47,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:47,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:47,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812124434] [2023-11-19 07:50:47,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:47,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:47,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:47,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:47,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 396 [2023-11-19 07:50:47,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 07:50:47,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:47,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 396 [2023-11-19 07:50:47,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:47,776 INFO L124 PetriNetUnfolderBase]: 758/1275 cut-off events. [2023-11-19 07:50:47,776 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2023-11-19 07:50:47,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2978 conditions, 1275 events. 758/1275 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5713 event pairs, 276 based on Foata normal form. 0/1071 useless extension candidates. Maximal degree in co-relation 2970. Up to 1000 conditions per place. [2023-11-19 07:50:47,787 INFO L140 encePairwiseOnDemand]: 393/396 looper letters, 62 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-19 07:50:47,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 307 flow [2023-11-19 07:50:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-11-19 07:50:47,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058922558922558 [2023-11-19 07:50:47,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-11-19 07:50:47,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-11-19 07:50:47,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:47,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-11-19 07:50:47,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:47,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:47,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:47,797 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 130 flow. Second operand 3 states and 601 transitions. [2023-11-19 07:50:47,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 307 flow [2023-11-19 07:50:47,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 65 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:47,802 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 138 flow [2023-11-19 07:50:47,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-11-19 07:50:47,803 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-11-19 07:50:47,803 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 138 flow [2023-11-19 07:50:47,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 07:50:47,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:47,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:47,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:50:47,804 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:50:47,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1677178641, now seen corresponding path program 1 times [2023-11-19 07:50:47,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:47,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753705163] [2023-11-19 07:50:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:47,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:47,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753705163] [2023-11-19 07:50:47,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753705163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:47,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500380719] [2023-11-19 07:50:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:47,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:47,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:47,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:50:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:50:48,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:48,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:48,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500380719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:48,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:48,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-19 07:50:48,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439562945] [2023-11-19 07:50:48,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:48,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:50:48,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:50:48,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:50:48,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 396 [2023-11-19 07:50:48,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 138 flow. Second operand has 10 states, 10 states have (on average 178.6) internal successors, (1786), 10 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states 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 07:50:48,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:48,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 396 [2023-11-19 07:50:48,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:49,149 INFO L124 PetriNetUnfolderBase]: 2435/3960 cut-off events. [2023-11-19 07:50:49,150 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2023-11-19 07:50:49,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9491 conditions, 3960 events. 2435/3960 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 19813 event pairs, 426 based on Foata normal form. 0/3434 useless extension candidates. Maximal degree in co-relation 9482. Up to 1190 conditions per place. [2023-11-19 07:50:49,178 INFO L140 encePairwiseOnDemand]: 390/396 looper letters, 201 selfloop transitions, 23 changer transitions 0/224 dead transitions. [2023-11-19 07:50:49,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 224 transitions, 1051 flow [2023-11-19 07:50:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:50:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:50:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1969 transitions. [2023-11-19 07:50:49,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2023-11-19 07:50:49,185 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1969 transitions. [2023-11-19 07:50:49,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1969 transitions. [2023-11-19 07:50:49,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:49,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1969 transitions. [2023-11-19 07:50:49,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 196.9) internal successors, (1969), 10 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states 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 07:50:49,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 396.0) internal successors, (4356), 11 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states 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 07:50:49,203 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 396.0) internal successors, (4356), 11 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states 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 07:50:49,203 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 138 flow. Second operand 10 states and 1969 transitions. [2023-11-19 07:50:49,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 224 transitions, 1051 flow [2023-11-19 07:50:49,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 224 transitions, 1047 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:49,213 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 303 flow [2023-11-19 07:50:49,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=303, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2023-11-19 07:50:49,214 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2023-11-19 07:50:49,214 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 303 flow [2023-11-19 07:50:49,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 178.6) internal successors, (1786), 10 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states 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 07:50:49,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:49,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:49,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:49,439 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 07:50:49,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:49,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1677179110, now seen corresponding path program 1 times [2023-11-19 07:50:49,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:49,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870804794] [2023-11-19 07:50:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:49,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:49,769 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 07:50:49,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:49,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870804794] [2023-11-19 07:50:49,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870804794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:49,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420254574] [2023-11-19 07:50:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:49,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:49,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:50:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:49,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:50:49,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:49,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:49,978 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 07:50:49,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:49,997 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-19 07:50:49,997 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 07:50:50,177 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 07:50:50,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:50,336 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 07:50:50,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420254574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:50,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:50,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-11-19 07:50:50,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551616022] [2023-11-19 07:50:50,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:50,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:50:50,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:50,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:50:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:50:51,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 396 [2023-11-19 07:50:51,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 303 flow. Second operand has 16 states, 16 states have (on average 170.625) internal successors, (2730), 16 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states 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 07:50:51,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:51,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 396 [2023-11-19 07:50:51,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:53,424 INFO L124 PetriNetUnfolderBase]: 3423/5560 cut-off events. [2023-11-19 07:50:53,425 INFO L125 PetriNetUnfolderBase]: For 3331/3331 co-relation queries the response was YES. [2023-11-19 07:50:53,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14553 conditions, 5560 events. 3423/5560 cut-off events. For 3331/3331 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 27080 event pairs, 832 based on Foata normal form. 84/5106 useless extension candidates. Maximal degree in co-relation 14541. Up to 3633 conditions per place. [2023-11-19 07:50:53,471 INFO L140 encePairwiseOnDemand]: 389/396 looper letters, 203 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2023-11-19 07:50:53,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 224 transitions, 1202 flow [2023-11-19 07:50:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:50:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:50:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2038 transitions. [2023-11-19 07:50:53,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46786042240587694 [2023-11-19 07:50:53,481 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2038 transitions. [2023-11-19 07:50:53,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2038 transitions. [2023-11-19 07:50:53,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:53,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2038 transitions. [2023-11-19 07:50:53,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.27272727272728) internal successors, (2038), 11 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states 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 07:50:53,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 396.0) internal successors, (4752), 12 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states 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 07:50:53,501 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 396.0) internal successors, (4752), 12 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states 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 07:50:53,501 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 303 flow. Second operand 11 states and 2038 transitions. [2023-11-19 07:50:53,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 224 transitions, 1202 flow [2023-11-19 07:50:53,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 224 transitions, 1188 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:53,520 INFO L231 Difference]: Finished difference. Result has 75 places, 86 transitions, 500 flow [2023-11-19 07:50:53,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=500, PETRI_PLACES=75, PETRI_TRANSITIONS=86} [2023-11-19 07:50:53,522 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 26 predicate places. [2023-11-19 07:50:53,523 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 86 transitions, 500 flow [2023-11-19 07:50:53,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.625) internal successors, (2730), 16 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states 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 07:50:53,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:53,541 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 07:50:53,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:53,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:53,756 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:50:53,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash 125315668, now seen corresponding path program 1 times [2023-11-19 07:50:53,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:53,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837507200] [2023-11-19 07:50:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:53,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:53,874 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 07:50:53,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:53,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837507200] [2023-11-19 07:50:53,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837507200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:53,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:53,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:53,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631651987] [2023-11-19 07:50:53,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:53,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:53,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:53,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:53,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:53,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 396 [2023-11-19 07:50:53,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 86 transitions, 500 flow. Second operand has 3 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 07:50:53,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:53,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 396 [2023-11-19 07:50:53,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:54,185 INFO L124 PetriNetUnfolderBase]: 852/1615 cut-off events. [2023-11-19 07:50:54,186 INFO L125 PetriNetUnfolderBase]: For 950/950 co-relation queries the response was YES. [2023-11-19 07:50:54,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4277 conditions, 1615 events. 852/1615 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7198 event pairs, 117 based on Foata normal form. 94/1633 useless extension candidates. Maximal degree in co-relation 4258. Up to 1249 conditions per place. [2023-11-19 07:50:54,201 INFO L140 encePairwiseOnDemand]: 391/396 looper letters, 62 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2023-11-19 07:50:54,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 507 flow [2023-11-19 07:50:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2023-11-19 07:50:54,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2023-11-19 07:50:54,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2023-11-19 07:50:54,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2023-11-19 07:50:54,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:54,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2023-11-19 07:50:54,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 07:50:54,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:54,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:54,211 INFO L175 Difference]: Start difference. First operand has 75 places, 86 transitions, 500 flow. Second operand 3 states and 579 transitions. [2023-11-19 07:50:54,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 507 flow [2023-11-19 07:50:54,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 493 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-19 07:50:54,220 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 345 flow [2023-11-19 07:50:54,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2023-11-19 07:50:54,222 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2023-11-19 07:50:54,222 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 345 flow [2023-11-19 07:50:54,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 07:50:54,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:54,223 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 07:50:54,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:50:54,223 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 07:50:54,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1256207957, now seen corresponding path program 1 times [2023-11-19 07:50:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:54,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722919371] [2023-11-19 07:50:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:54,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,794 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 07:50:54,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:54,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722919371] [2023-11-19 07:50:54,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722919371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:54,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:54,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 07:50:54,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896735805] [2023-11-19 07:50:54,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:54,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:50:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:54,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:50:54,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:50:56,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 396 [2023-11-19 07:50:56,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 345 flow. Second operand has 12 states, 12 states have (on average 158.66666666666666) internal successors, (1904), 12 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states 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 07:50:56,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:56,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 396 [2023-11-19 07:50:56,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:57,184 INFO L124 PetriNetUnfolderBase]: 922/1703 cut-off events. [2023-11-19 07:50:57,184 INFO L125 PetriNetUnfolderBase]: For 759/759 co-relation queries the response was YES. [2023-11-19 07:50:57,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4655 conditions, 1703 events. 922/1703 cut-off events. For 759/759 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7211 event pairs, 232 based on Foata normal form. 0/1685 useless extension candidates. Maximal degree in co-relation 4635. Up to 1304 conditions per place. [2023-11-19 07:50:57,197 INFO L140 encePairwiseOnDemand]: 384/396 looper letters, 116 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2023-11-19 07:50:57,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 764 flow [2023-11-19 07:50:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:50:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:50:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1839 transitions. [2023-11-19 07:50:57,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4221763085399449 [2023-11-19 07:50:57,206 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1839 transitions. [2023-11-19 07:50:57,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1839 transitions. [2023-11-19 07:50:57,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:57,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1839 transitions. [2023-11-19 07:50:57,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.1818181818182) internal successors, (1839), 11 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states 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 07:50:57,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 396.0) internal successors, (4752), 12 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states 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 07:50:57,222 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 396.0) internal successors, (4752), 12 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states 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 07:50:57,222 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 345 flow. Second operand 11 states and 1839 transitions. [2023-11-19 07:50:57,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 764 flow [2023-11-19 07:50:57,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 128 transitions, 752 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:57,230 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 406 flow [2023-11-19 07:50:57,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=406, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-11-19 07:50:57,231 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2023-11-19 07:50:57,232 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 406 flow [2023-11-19 07:50:57,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 158.66666666666666) internal successors, (1904), 12 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states 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 07:50:57,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:57,233 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 07:50:57,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:50:57,233 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 07:50:57,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:57,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1888940996, now seen corresponding path program 1 times [2023-11-19 07:50:57,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:57,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108824764] [2023-11-19 07:50:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:57,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:57,358 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 07:50:57,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:57,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108824764] [2023-11-19 07:50:57,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108824764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:57,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:57,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:50:57,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188628745] [2023-11-19 07:50:57,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:57,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:57,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:57,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:57,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 396 [2023-11-19 07:50:57,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 406 flow. Second operand has 6 states, 6 states have (on average 172.16666666666666) internal successors, (1033), 6 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states 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 07:50:57,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:57,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 396 [2023-11-19 07:50:57,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:57,928 INFO L124 PetriNetUnfolderBase]: 858/1627 cut-off events. [2023-11-19 07:50:57,928 INFO L125 PetriNetUnfolderBase]: For 1082/1082 co-relation queries the response was YES. [2023-11-19 07:50:57,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4695 conditions, 1627 events. 858/1627 cut-off events. For 1082/1082 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7133 event pairs, 359 based on Foata normal form. 0/1609 useless extension candidates. Maximal degree in co-relation 4668. Up to 823 conditions per place. [2023-11-19 07:50:57,944 INFO L140 encePairwiseOnDemand]: 386/396 looper letters, 55 selfloop transitions, 22 changer transitions 0/82 dead transitions. [2023-11-19 07:50:57,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 82 transitions, 591 flow [2023-11-19 07:50:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:50:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:50:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1064 transitions. [2023-11-19 07:50:57,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478114478114478 [2023-11-19 07:50:57,949 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1064 transitions. [2023-11-19 07:50:57,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1064 transitions. [2023-11-19 07:50:57,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:57,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1064 transitions. [2023-11-19 07:50:57,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.33333333333334) internal successors, (1064), 6 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 07:50:57,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states 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 07:50:57,958 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states 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 07:50:57,959 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 406 flow. Second operand 6 states and 1064 transitions. [2023-11-19 07:50:57,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 82 transitions, 591 flow [2023-11-19 07:50:57,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 82 transitions, 582 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:50:57,968 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 439 flow [2023-11-19 07:50:57,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=439, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2023-11-19 07:50:57,969 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2023-11-19 07:50:57,970 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 439 flow [2023-11-19 07:50:57,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 172.16666666666666) internal successors, (1033), 6 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states 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 07:50:57,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:57,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:57,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:50:57,971 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 07:50:57,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1168938776, now seen corresponding path program 1 times [2023-11-19 07:50:57,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:57,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089082856] [2023-11-19 07:50:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:57,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:58,029 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 07:50:58,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:58,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089082856] [2023-11-19 07:50:58,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089082856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:58,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:58,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:58,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239870390] [2023-11-19 07:50:58,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:58,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:58,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:58,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:58,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:58,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 396 [2023-11-19 07:50:58,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 439 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 07:50:58,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:58,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 396 [2023-11-19 07:50:58,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:58,412 INFO L124 PetriNetUnfolderBase]: 1109/2112 cut-off events. [2023-11-19 07:50:58,412 INFO L125 PetriNetUnfolderBase]: For 2016/2016 co-relation queries the response was YES. [2023-11-19 07:50:58,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6360 conditions, 2112 events. 1109/2112 cut-off events. For 2016/2016 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10300 event pairs, 668 based on Foata normal form. 72/2148 useless extension candidates. Maximal degree in co-relation 6333. Up to 1548 conditions per place. [2023-11-19 07:50:58,432 INFO L140 encePairwiseOnDemand]: 392/396 looper letters, 107 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2023-11-19 07:50:58,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 115 transitions, 940 flow [2023-11-19 07:50:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-11-19 07:50:58,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067340067340067 [2023-11-19 07:50:58,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-11-19 07:50:58,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-11-19 07:50:58,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:58,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-11-19 07:50:58,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states 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 07:50:58,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:58,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states 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 07:50:58,443 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 439 flow. Second operand 3 states and 602 transitions. [2023-11-19 07:50:58,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 115 transitions, 940 flow [2023-11-19 07:50:58,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 864 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 07:50:58,456 INFO L231 Difference]: Finished difference. Result has 84 places, 71 transitions, 416 flow [2023-11-19 07:50:58,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=84, PETRI_TRANSITIONS=71} [2023-11-19 07:50:58,457 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2023-11-19 07:50:58,457 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 71 transitions, 416 flow [2023-11-19 07:50:58,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 07:50:58,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:58,458 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 07:50:58,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:50:58,458 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 07:50:58,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1577620195, now seen corresponding path program 1 times [2023-11-19 07:50:58,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:58,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142612287] [2023-11-19 07:50:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:58,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,348 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 07:50:59,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:59,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142612287] [2023-11-19 07:50:59,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142612287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:59,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:59,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 07:50:59,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160181303] [2023-11-19 07:50:59,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:59,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:50:59,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:59,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:50:59,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:51:01,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 396 [2023-11-19 07:51:01,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 71 transitions, 416 flow. Second operand has 15 states, 15 states have (on average 148.46666666666667) internal successors, (2227), 15 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states 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 07:51:01,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:01,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 396 [2023-11-19 07:51:01,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:02,651 INFO L124 PetriNetUnfolderBase]: 1354/2538 cut-off events. [2023-11-19 07:51:02,651 INFO L125 PetriNetUnfolderBase]: For 1725/1725 co-relation queries the response was YES. [2023-11-19 07:51:02,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7749 conditions, 2538 events. 1354/2538 cut-off events. For 1725/1725 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12402 event pairs, 372 based on Foata normal form. 12/2550 useless extension candidates. Maximal degree in co-relation 7721. Up to 2001 conditions per place. [2023-11-19 07:51:02,680 INFO L140 encePairwiseOnDemand]: 380/396 looper letters, 137 selfloop transitions, 27 changer transitions 0/164 dead transitions. [2023-11-19 07:51:02,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 164 transitions, 1093 flow [2023-11-19 07:51:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:51:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:51:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2779 transitions. [2023-11-19 07:51:02,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898709315375982 [2023-11-19 07:51:02,693 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2779 transitions. [2023-11-19 07:51:02,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2779 transitions. [2023-11-19 07:51:02,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:02,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2779 transitions. [2023-11-19 07:51:02,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.38888888888889) internal successors, (2779), 18 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states 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 07:51:02,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 396.0) internal successors, (7524), 19 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states 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 07:51:02,718 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 396.0) internal successors, (7524), 19 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states 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 07:51:02,718 INFO L175 Difference]: Start difference. First operand has 84 places, 71 transitions, 416 flow. Second operand 18 states and 2779 transitions. [2023-11-19 07:51:02,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 164 transitions, 1093 flow [2023-11-19 07:51:02,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 164 transitions, 1080 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:51:02,734 INFO L231 Difference]: Finished difference. Result has 110 places, 93 transitions, 633 flow [2023-11-19 07:51:02,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=633, PETRI_PLACES=110, PETRI_TRANSITIONS=93} [2023-11-19 07:51:02,734 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 61 predicate places. [2023-11-19 07:51:02,735 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 93 transitions, 633 flow [2023-11-19 07:51:02,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 148.46666666666667) internal successors, (2227), 15 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states 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 07:51:02,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:02,736 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 07:51:02,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 07:51:02,736 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 07:51:02,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:02,737 INFO L85 PathProgramCache]: Analyzing trace with hash -240840647, now seen corresponding path program 2 times [2023-11-19 07:51:02,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:02,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529698382] [2023-11-19 07:51:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:03,780 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 07:51:03,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:03,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529698382] [2023-11-19 07:51:03,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529698382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:03,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:03,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 07:51:03,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305331721] [2023-11-19 07:51:03,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:03,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:51:03,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:51:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:51:05,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 396 [2023-11-19 07:51:05,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 93 transitions, 633 flow. Second operand has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 07:51:05,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:05,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 396 [2023-11-19 07:51:05,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:07,361 INFO L124 PetriNetUnfolderBase]: 1533/2878 cut-off events. [2023-11-19 07:51:07,361 INFO L125 PetriNetUnfolderBase]: For 2526/2526 co-relation queries the response was YES. [2023-11-19 07:51:07,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9473 conditions, 2878 events. 1533/2878 cut-off events. For 2526/2526 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14686 event pairs, 429 based on Foata normal form. 12/2890 useless extension candidates. Maximal degree in co-relation 9435. Up to 2017 conditions per place. [2023-11-19 07:51:07,393 INFO L140 encePairwiseOnDemand]: 380/396 looper letters, 136 selfloop transitions, 32 changer transitions 0/168 dead transitions. [2023-11-19 07:51:07,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 168 transitions, 1253 flow [2023-11-19 07:51:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:51:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:51:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2138 transitions. [2023-11-19 07:51:07,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856421356421356 [2023-11-19 07:51:07,402 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2138 transitions. [2023-11-19 07:51:07,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2138 transitions. [2023-11-19 07:51:07,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:07,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2138 transitions. [2023-11-19 07:51:07,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 152.71428571428572) internal successors, (2138), 14 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states 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 07:51:07,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 396.0) internal successors, (5940), 15 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states 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 07:51:07,421 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 396.0) internal successors, (5940), 15 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states 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 07:51:07,421 INFO L175 Difference]: Start difference. First operand has 110 places, 93 transitions, 633 flow. Second operand 14 states and 2138 transitions. [2023-11-19 07:51:07,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 168 transitions, 1253 flow [2023-11-19 07:51:07,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 168 transitions, 1244 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:51:07,445 INFO L231 Difference]: Finished difference. Result has 128 places, 102 transitions, 809 flow [2023-11-19 07:51:07,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=809, PETRI_PLACES=128, PETRI_TRANSITIONS=102} [2023-11-19 07:51:07,446 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 79 predicate places. [2023-11-19 07:51:07,447 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 102 transitions, 809 flow [2023-11-19 07:51:07,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 07:51:07,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:07,448 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 07:51:07,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 07:51:07,448 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 07:51:07,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:07,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1353770347, now seen corresponding path program 3 times [2023-11-19 07:51:07,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:07,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538428975] [2023-11-19 07:51:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:07,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,413 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 07:51:08,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:08,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538428975] [2023-11-19 07:51:08,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538428975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:08,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:08,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 07:51:08,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367793160] [2023-11-19 07:51:08,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:08,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:51:08,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:51:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:51:10,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 396 [2023-11-19 07:51:10,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 102 transitions, 809 flow. Second operand has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 07:51:10,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:10,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 396 [2023-11-19 07:51:10,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:12,078 INFO L124 PetriNetUnfolderBase]: 1545/2902 cut-off events. [2023-11-19 07:51:12,079 INFO L125 PetriNetUnfolderBase]: For 3581/3581 co-relation queries the response was YES. [2023-11-19 07:51:12,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10220 conditions, 2902 events. 1545/2902 cut-off events. For 3581/3581 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 14764 event pairs, 423 based on Foata normal form. 12/2914 useless extension candidates. Maximal degree in co-relation 10174. Up to 1715 conditions per place. [2023-11-19 07:51:12,111 INFO L140 encePairwiseOnDemand]: 380/396 looper letters, 128 selfloop transitions, 41 changer transitions 0/169 dead transitions. [2023-11-19 07:51:12,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 169 transitions, 1378 flow [2023-11-19 07:51:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:51:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:51:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2282 transitions. [2023-11-19 07:51:12,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38417508417508417 [2023-11-19 07:51:12,118 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2282 transitions. [2023-11-19 07:51:12,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2282 transitions. [2023-11-19 07:51:12,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:12,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2282 transitions. [2023-11-19 07:51:12,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 152.13333333333333) internal successors, (2282), 15 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states 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 07:51:12,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 396.0) internal successors, (6336), 16 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states 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 07:51:12,138 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 396.0) internal successors, (6336), 16 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states 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 07:51:12,138 INFO L175 Difference]: Start difference. First operand has 128 places, 102 transitions, 809 flow. Second operand 15 states and 2282 transitions. [2023-11-19 07:51:12,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 169 transitions, 1378 flow [2023-11-19 07:51:12,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 169 transitions, 1317 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-11-19 07:51:12,173 INFO L231 Difference]: Finished difference. Result has 139 places, 107 transitions, 900 flow [2023-11-19 07:51:12,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=900, PETRI_PLACES=139, PETRI_TRANSITIONS=107} [2023-11-19 07:51:12,174 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 90 predicate places. [2023-11-19 07:51:12,174 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 107 transitions, 900 flow [2023-11-19 07:51:12,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 07:51:12,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:12,175 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, 1, 1] [2023-11-19 07:51:12,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 07:51:12,175 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:51:12,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1546043593, now seen corresponding path program 1 times [2023-11-19 07:51:12,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:12,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236072865] [2023-11-19 07:51:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:12,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:51:12,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:12,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236072865] [2023-11-19 07:51:12,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236072865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:12,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802617805] [2023-11-19 07:51:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:12,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:12,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:12,236 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:12,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:51:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:12,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:51:12,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:51:12,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:51:12,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802617805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:12,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:12,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 07:51:12,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826833403] [2023-11-19 07:51:12,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:12,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:51:12,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:12,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:51:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:51:12,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 396 [2023-11-19 07:51:12,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 107 transitions, 900 flow. Second operand has 7 states, 7 states have (on average 182.85714285714286) internal successors, (1280), 7 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 07:51:12,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:12,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 396 [2023-11-19 07:51:12,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:13,660 INFO L124 PetriNetUnfolderBase]: 2839/5498 cut-off events. [2023-11-19 07:51:13,660 INFO L125 PetriNetUnfolderBase]: For 8330/8332 co-relation queries the response was YES. [2023-11-19 07:51:13,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19605 conditions, 5498 events. 2839/5498 cut-off events. For 8330/8332 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 34061 event pairs, 553 based on Foata normal form. 500/5997 useless extension candidates. Maximal degree in co-relation 19556. Up to 1220 conditions per place. [2023-11-19 07:51:13,731 INFO L140 encePairwiseOnDemand]: 391/396 looper letters, 328 selfloop transitions, 22 changer transitions 0/356 dead transitions. [2023-11-19 07:51:13,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 356 transitions, 3735 flow [2023-11-19 07:51:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:51:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:51:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1207 transitions. [2023-11-19 07:51:13,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.507996632996633 [2023-11-19 07:51:13,737 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1207 transitions. [2023-11-19 07:51:13,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1207 transitions. [2023-11-19 07:51:13,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:13,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1207 transitions. [2023-11-19 07:51:13,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.16666666666666) internal successors, (1207), 6 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states 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 07:51:13,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states 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 07:51:13,748 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states 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 07:51:13,748 INFO L175 Difference]: Start difference. First operand has 139 places, 107 transitions, 900 flow. Second operand 6 states and 1207 transitions. [2023-11-19 07:51:13,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 356 transitions, 3735 flow [2023-11-19 07:51:13,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 356 transitions, 3493 flow, removed 17 selfloop flow, removed 11 redundant places. [2023-11-19 07:51:13,847 INFO L231 Difference]: Finished difference. Result has 137 places, 118 transitions, 1008 flow [2023-11-19 07:51:13,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1008, PETRI_PLACES=137, PETRI_TRANSITIONS=118} [2023-11-19 07:51:13,848 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 88 predicate places. [2023-11-19 07:51:13,848 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 118 transitions, 1008 flow [2023-11-19 07:51:13,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.85714285714286) internal successors, (1280), 7 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 07:51:13,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:13,850 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 07:51:13,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:14,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:14,071 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-19 07:51:14,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash 316202739, now seen corresponding path program 1 times [2023-11-19 07:51:14,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:14,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151821378] [2023-11-19 07:51:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:14,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:14,507 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 07:51:14,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:14,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151821378] [2023-11-19 07:51:14,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151821378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:14,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710544667] [2023-11-19 07:51:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:14,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:14,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:14,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:14,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b88c6ec-d4ca-4c73-a6f5-3dbd83a5f276/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:51:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:14,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-19 07:51:14,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:15,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:15,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:15,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-11-19 07:51:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:15,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710544667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:15,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:15,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-11-19 07:51:15,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839214318] [2023-11-19 07:51:15,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:15,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:51:15,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:15,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:51:15,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600