./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI --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 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:52:52,278 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:52:52,411 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:52:52,424 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:52:52,425 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:52:52,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:52:52,474 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:52:52,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:52:52,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:52:52,484 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:52:52,484 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:52:52,486 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:52:52,487 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:52:52,489 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:52:52,489 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:52:52,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:52:52,491 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:52:52,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:52:52,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:52:52,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:52:52,492 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:52:52,493 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:52:52,493 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:52:52,494 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:52:52,494 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:52:52,495 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:52:52,495 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:52:52,496 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:52:52,497 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:52:52,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:52:52,499 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:52:52,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:52:52,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:52:52,500 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:52:52,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:52:52,500 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:52:52,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:52:52,501 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:52:52,501 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:52:52,501 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:52:52,502 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:52:52,502 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_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd [2023-11-24 21:52:52,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:52:52,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:52:52,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:52:52,899 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:52:52,900 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:52:52,901 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i [2023-11-24 21:52:56,204 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:52:56,481 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:52:56,483 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i [2023-11-24 21:52:56,505 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/data/a2cdbc3e1/ef58ad38e64345af82e309626d8c057f/FLAGef51f9936 [2023-11-24 21:52:56,521 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/data/a2cdbc3e1/ef58ad38e64345af82e309626d8c057f [2023-11-24 21:52:56,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:52:56,526 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:52:56,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:52:56,528 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:52:56,544 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:52:56,545 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:52:56" (1/1) ... [2023-11-24 21:52:56,546 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d463f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:56, skipping insertion in model container [2023-11-24 21:52:56,546 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:52:56" (1/1) ... [2023-11-24 21:52:56,603 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:52:56,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:52:56,938 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:52:56,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:52:57,020 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:52:57,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57 WrapperNode [2023-11-24 21:52:57,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:52:57,022 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:52:57,022 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:52:57,022 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:52:57,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,043 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,064 INFO L138 Inliner]: procedures = 163, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2023-11-24 21:52:57,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:52:57,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:52:57,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:52:57,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:52:57,077 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,080 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,094 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-11-24 21:52:57,095 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,095 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,100 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,104 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,106 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,107 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,111 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:52:57,112 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:52:57,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:52:57,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:52:57,113 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (1/1) ... [2023-11-24 21:52:57,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:52:57,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:57,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:52:57,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72784430-c4f9-4447-bcdc-f6ab93dbe01a/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:52:57,215 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-24 21:52:57,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-24 21:52:57,215 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-24 21:52:57,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-24 21:52:57,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:52:57,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:52:57,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:52:57,216 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:52:57,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:52:57,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:52:57,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:52:57,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:52:57,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:52:57,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:52:57,219 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:52:57,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:52:57,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:52:57,223 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:52:57,417 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:52:57,419 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:52:57,629 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:52:57,781 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:52:57,781 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:52:57,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:52:57 BoogieIcfgContainer [2023-11-24 21:52:57,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:52:57,784 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:52:57,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:52:57,788 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:52:57,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:52:56" (1/3) ... [2023-11-24 21:52:57,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c9a2e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:52:57, skipping insertion in model container [2023-11-24 21:52:57,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:57" (2/3) ... [2023-11-24 21:52:57,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c9a2e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:52:57, skipping insertion in model container [2023-11-24 21:52:57,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:52:57" (3/3) ... [2023-11-24 21:52:57,791 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2023-11-24 21:52:57,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:52:57,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-24 21:52:57,814 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:52:57,850 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:52:57,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 38 transitions, 84 flow [2023-11-24 21:52:57,911 INFO L124 PetriNetUnfolderBase]: 4/44 cut-off events. [2023-11-24 21:52:57,911 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:52:57,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 44 events. 4/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 119 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2023-11-24 21:52:57,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 38 transitions, 84 flow [2023-11-24 21:52:57,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 37 transitions, 81 flow [2023-11-24 21:52:57,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:52:57,936 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;@9cf0423, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:52:57,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-24 21:52:57,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:52:57,940 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:52:57,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:52:57,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:57,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:52:57,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:52:57,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash 7580, now seen corresponding path program 1 times [2023-11-24 21:52:57,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:57,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403045053] [2023-11-24 21:52:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:57,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:58,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:58,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403045053] [2023-11-24 21:52:58,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403045053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:58,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:58,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:52:58,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110922990] [2023-11-24 21:52:58,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:58,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:58,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:58,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:58,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:58,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2023-11-24 21:52:58,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:58,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2023-11-24 21:52:58,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:58,536 INFO L124 PetriNetUnfolderBase]: 110/251 cut-off events. [2023-11-24 21:52:58,536 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:52:58,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 251 events. 110/251 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1204 event pairs, 93 based on Foata normal form. 86/324 useless extension candidates. Maximal degree in co-relation 439. Up to 187 conditions per place. [2023-11-24 21:52:58,546 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 13 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-24 21:52:58,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 89 flow [2023-11-24 21:52:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2023-11-24 21:52:58,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2023-11-24 21:52:58,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2023-11-24 21:52:58,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2023-11-24 21:52:58,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:58,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2023-11-24 21:52:58,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,581 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 81 flow. Second operand 3 states and 66 transitions. [2023-11-24 21:52:58,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 89 flow [2023-11-24 21:52:58,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:58,588 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 62 flow [2023-11-24 21:52:58,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-24 21:52:58,596 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-11-24 21:52:58,597 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 62 flow [2023-11-24 21:52:58,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:58,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:52:58,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:52:58,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:52:58,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash 7581, now seen corresponding path program 1 times [2023-11-24 21:52:58,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:58,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112811901] [2023-11-24 21:52:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:58,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:58,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:58,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112811901] [2023-11-24 21:52:58,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112811901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:58,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:58,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:52:58,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634159112] [2023-11-24 21:52:58,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:58,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:58,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:58,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:58,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2023-11-24 21:52:58,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:58,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2023-11-24 21:52:58,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:58,926 INFO L124 PetriNetUnfolderBase]: 79/191 cut-off events. [2023-11-24 21:52:58,926 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:52:58,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 191 events. 79/191 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 847 event pairs, 66 based on Foata normal form. 21/199 useless extension candidates. Maximal degree in co-relation 334. Up to 135 conditions per place. [2023-11-24 21:52:58,932 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 11 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-24 21:52:58,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 82 flow [2023-11-24 21:52:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-24 21:52:58,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2023-11-24 21:52:58,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-24 21:52:58,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-24 21:52:58,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:58,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-24 21:52:58,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,945 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 62 flow. Second operand 3 states and 65 transitions. [2023-11-24 21:52:58,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 82 flow [2023-11-24 21:52:58,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 81 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:58,973 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 59 flow [2023-11-24 21:52:58,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2023-11-24 21:52:58,975 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2023-11-24 21:52:58,976 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 59 flow [2023-11-24 21:52:58,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:58,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:58,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:52:58,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:52:58,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash -166314893, now seen corresponding path program 1 times [2023-11-24 21:52:58,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:58,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542508219] [2023-11-24 21:52:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:58,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:59,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:59,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542508219] [2023-11-24 21:52:59,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542508219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:59,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:59,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:59,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874851283] [2023-11-24 21:52:59,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:59,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:59,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:59,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:59,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:59,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 38 [2023-11-24 21:52:59,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:59,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 38 [2023-11-24 21:52:59,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:59,154 INFO L124 PetriNetUnfolderBase]: 158/359 cut-off events. [2023-11-24 21:52:59,155 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:52:59,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 359 events. 158/359 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1659 event pairs, 50 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 624. Up to 134 conditions per place. [2023-11-24 21:52:59,162 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 18 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-24 21:52:59,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 117 flow [2023-11-24 21:52:59,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-24 21:52:59,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-24 21:52:59,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-24 21:52:59,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-24 21:52:59,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:59,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-24 21:52:59,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,170 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 59 flow. Second operand 3 states and 76 transitions. [2023-11-24 21:52:59,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 117 flow [2023-11-24 21:52:59,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:59,174 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 80 flow [2023-11-24 21:52:59,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-24 21:52:59,176 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-11-24 21:52:59,176 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 80 flow [2023-11-24 21:52:59,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:59,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:59,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:52:59,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:52:59,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:59,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1638286471, now seen corresponding path program 1 times [2023-11-24 21:52:59,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:59,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647357984] [2023-11-24 21:52:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:52:59,229 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:52:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:52:59,275 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:52:59,277 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:52:59,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-24 21:52:59,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-11-24 21:52:59,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-24 21:52:59,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-24 21:52:59,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-11-24 21:52:59,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2023-11-24 21:52:59,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-24 21:52:59,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 9 remaining) [2023-11-24 21:52:59,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-24 21:52:59,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:52:59,291 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 21:52:59,295 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:52:59,295 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-24 21:52:59,340 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:52:59,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 142 flow [2023-11-24 21:52:59,356 INFO L124 PetriNetUnfolderBase]: 5/60 cut-off events. [2023-11-24 21:52:59,356 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:52:59,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 60 events. 5/60 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 173 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 67. Up to 3 conditions per place. [2023-11-24 21:52:59,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 61 transitions, 142 flow [2023-11-24 21:52:59,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 45 transitions, 103 flow [2023-11-24 21:52:59,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:52:59,364 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;@9cf0423, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:52:59,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-24 21:52:59,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:52:59,366 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:52:59,366 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:52:59,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:59,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:52:59,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-24 21:52:59,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:59,368 INFO L85 PathProgramCache]: Analyzing trace with hash 9532, now seen corresponding path program 1 times [2023-11-24 21:52:59,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:59,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943753727] [2023-11-24 21:52:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:59,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:59,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:59,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943753727] [2023-11-24 21:52:59,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943753727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:59,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:59,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:52:59,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474564266] [2023-11-24 21:52:59,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:59,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:59,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:59,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:59,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 61 [2023-11-24 21:52:59,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:59,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 61 [2023-11-24 21:52:59,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:59,732 INFO L124 PetriNetUnfolderBase]: 766/1379 cut-off events. [2023-11-24 21:52:59,732 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-24 21:52:59,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 1379 events. 766/1379 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8007 event pairs, 621 based on Foata normal form. 511/1834 useless extension candidates. Maximal degree in co-relation 2519. Up to 1091 conditions per place. [2023-11-24 21:52:59,750 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 17 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-24 21:52:59,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 117 flow [2023-11-24 21:52:59,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2023-11-24 21:52:59,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5519125683060109 [2023-11-24 21:52:59,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 101 transitions. [2023-11-24 21:52:59,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 101 transitions. [2023-11-24 21:52:59,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:59,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 101 transitions. [2023-11-24 21:52:59,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,756 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 103 flow. Second operand 3 states and 101 transitions. [2023-11-24 21:52:59,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 117 flow [2023-11-24 21:52:59,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:59,759 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 82 flow [2023-11-24 21:52:59,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-24 21:52:59,760 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-11-24 21:52:59,761 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 82 flow [2023-11-24 21:52:59,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:59,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:52:59,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:52:59,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-24 21:52:59,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash 9533, now seen corresponding path program 1 times [2023-11-24 21:52:59,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:59,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43708241] [2023-11-24 21:52:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:59,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:59,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:59,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43708241] [2023-11-24 21:52:59,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43708241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:59,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:59,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:52:59,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163365139] [2023-11-24 21:52:59,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:59,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:59,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:59,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:59,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:59,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 61 [2023-11-24 21:52:59,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:59,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 61 [2023-11-24 21:52:59,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:00,002 INFO L124 PetriNetUnfolderBase]: 559/1031 cut-off events. [2023-11-24 21:53:00,002 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-11-24 21:53:00,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 1031 events. 559/1031 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5752 event pairs, 450 based on Foata normal form. 85/1064 useless extension candidates. Maximal degree in co-relation 1886. Up to 799 conditions per place. [2023-11-24 21:53:00,015 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 15 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-24 21:53:00,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 110 flow [2023-11-24 21:53:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2023-11-24 21:53:00,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409836065573771 [2023-11-24 21:53:00,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2023-11-24 21:53:00,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2023-11-24 21:53:00,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:00,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2023-11-24 21:53:00,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,020 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 82 flow. Second operand 3 states and 99 transitions. [2023-11-24 21:53:00,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 110 flow [2023-11-24 21:53:00,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 32 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:00,023 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 79 flow [2023-11-24 21:53:00,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-24 21:53:00,024 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-11-24 21:53:00,024 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 79 flow [2023-11-24 21:53:00,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:00,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:00,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:53:00,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-24 21:53:00,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:00,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1213951251, now seen corresponding path program 1 times [2023-11-24 21:53:00,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:00,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393312334] [2023-11-24 21:53:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:00,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:00,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:00,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393312334] [2023-11-24 21:53:00,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393312334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:00,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:00,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:53:00,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606512421] [2023-11-24 21:53:00,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:00,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:00,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:00,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:00,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 61 [2023-11-24 21:53:00,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:00,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 61 [2023-11-24 21:53:00,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:00,377 INFO L124 PetriNetUnfolderBase]: 1203/2163 cut-off events. [2023-11-24 21:53:00,377 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-24 21:53:00,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3950 conditions, 2163 events. 1203/2163 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13029 event pairs, 303 based on Foata normal form. 0/2052 useless extension candidates. Maximal degree in co-relation 3941. Up to 1003 conditions per place. [2023-11-24 21:53:00,401 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 25 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-11-24 21:53:00,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 166 flow [2023-11-24 21:53:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-24 21:53:00,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6065573770491803 [2023-11-24 21:53:00,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-24 21:53:00,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-24 21:53:00,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:00,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-24 21:53:00,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,407 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 79 flow. Second operand 3 states and 111 transitions. [2023-11-24 21:53:00,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 166 flow [2023-11-24 21:53:00,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:00,410 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 108 flow [2023-11-24 21:53:00,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-11-24 21:53:00,412 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2023-11-24 21:53:00,413 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 108 flow [2023-11-24 21:53:00,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:00,413 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:00,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:53:00,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-24 21:53:00,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:00,415 INFO L85 PathProgramCache]: Analyzing trace with hash -441665005, now seen corresponding path program 1 times [2023-11-24 21:53:00,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:00,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276276431] [2023-11-24 21:53:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:00,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:53:00,444 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:53:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:53:00,470 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:53:00,470 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:53:00,471 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-24 21:53:00,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-11-24 21:53:00,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-24 21:53:00,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-24 21:53:00,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-24 21:53:00,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-24 21:53:00,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-24 21:53:00,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-11-24 21:53:00,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-24 21:53:00,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-24 21:53:00,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:53:00,476 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 21:53:00,477 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:53:00,477 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-24 21:53:00,514 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:53:00,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 84 transitions, 204 flow [2023-11-24 21:53:00,531 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2023-11-24 21:53:00,531 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-24 21:53:00,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 76 events. 6/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 223 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-11-24 21:53:00,532 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 84 transitions, 204 flow [2023-11-24 21:53:00,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 127 flow [2023-11-24 21:53:00,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:53:00,540 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;@9cf0423, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:53:00,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-24 21:53:00,542 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:53:00,542 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:53:00,542 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:53:00,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:00,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:53:00,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-24 21:53:00,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:00,543 INFO L85 PathProgramCache]: Analyzing trace with hash 12220, now seen corresponding path program 1 times [2023-11-24 21:53:00,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:00,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041261346] [2023-11-24 21:53:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:00,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:00,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:00,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041261346] [2023-11-24 21:53:00,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041261346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:00,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:00,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:53:00,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551092648] [2023-11-24 21:53:00,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:00,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:00,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:00,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:00,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:00,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 84 [2023-11-24 21:53:00,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:00,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 84 [2023-11-24 21:53:00,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:01,729 INFO L124 PetriNetUnfolderBase]: 4414/6931 cut-off events. [2023-11-24 21:53:01,729 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2023-11-24 21:53:01,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12982 conditions, 6931 events. 4414/6931 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 44346 event pairs, 3501 based on Foata normal form. 2734/9416 useless extension candidates. Maximal degree in co-relation 12967. Up to 5731 conditions per place. [2023-11-24 21:53:01,817 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 21 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-24 21:53:01,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 147 flow [2023-11-24 21:53:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2023-11-24 21:53:01,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-11-24 21:53:01,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2023-11-24 21:53:01,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2023-11-24 21:53:01,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:01,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2023-11-24 21:53:01,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:01,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:01,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:01,823 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 127 flow. Second operand 3 states and 136 transitions. [2023-11-24 21:53:01,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 147 flow [2023-11-24 21:53:01,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 41 transitions, 144 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:01,827 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 102 flow [2023-11-24 21:53:01,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-11-24 21:53:01,828 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-11-24 21:53:01,828 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 102 flow [2023-11-24 21:53:01,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:01,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:01,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:53:01,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:53:01,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-24 21:53:01,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:01,830 INFO L85 PathProgramCache]: Analyzing trace with hash 12221, now seen corresponding path program 1 times [2023-11-24 21:53:01,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:01,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613812391] [2023-11-24 21:53:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:01,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:01,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:01,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613812391] [2023-11-24 21:53:01,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613812391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:01,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:01,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:53:01,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494036437] [2023-11-24 21:53:01,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:01,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:01,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:01,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:01,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:01,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2023-11-24 21:53:01,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:01,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:01,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2023-11-24 21:53:01,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:02,631 INFO L124 PetriNetUnfolderBase]: 3247/5207 cut-off events. [2023-11-24 21:53:02,631 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2023-11-24 21:53:02,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9703 conditions, 5207 events. 3247/5207 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 32779 event pairs, 2562 based on Foata normal form. 341/5315 useless extension candidates. Maximal degree in co-relation 9694. Up to 4239 conditions per place. [2023-11-24 21:53:02,686 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 19 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-24 21:53:02,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 138 flow [2023-11-24 21:53:02,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-24 21:53:02,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-24 21:53:02,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-24 21:53:02,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-24 21:53:02,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:02,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-24 21:53:02,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:02,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:02,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:02,695 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 102 flow. Second operand 3 states and 133 transitions. [2023-11-24 21:53:02,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 138 flow [2023-11-24 21:53:02,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 39 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:02,700 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 99 flow [2023-11-24 21:53:02,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2023-11-24 21:53:02,703 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-11-24 21:53:02,704 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 99 flow [2023-11-24 21:53:02,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:02,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:02,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:02,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:53:02,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-24 21:53:02,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash 546408773, now seen corresponding path program 1 times [2023-11-24 21:53:02,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:02,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262642399] [2023-11-24 21:53:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:02,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:02,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:02,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262642399] [2023-11-24 21:53:02,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262642399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:02,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:02,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:53:02,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015848781] [2023-11-24 21:53:02,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:02,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:02,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:02,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:02,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:02,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2023-11-24 21:53:02,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:02,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:02,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2023-11-24 21:53:02,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:04,142 INFO L124 PetriNetUnfolderBase]: 6995/11048 cut-off events. [2023-11-24 21:53:04,142 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2023-11-24 21:53:04,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20554 conditions, 11048 events. 6995/11048 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 74405 event pairs, 1712 based on Foata normal form. 0/10546 useless extension candidates. Maximal degree in co-relation 20544. Up to 5767 conditions per place. [2023-11-24 21:53:04,240 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 32 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-11-24 21:53:04,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 55 transitions, 215 flow [2023-11-24 21:53:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-24 21:53:04,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2023-11-24 21:53:04,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-24 21:53:04,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-24 21:53:04,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:04,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-24 21:53:04,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:04,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:04,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:04,246 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 99 flow. Second operand 3 states and 146 transitions. [2023-11-24 21:53:04,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 55 transitions, 215 flow [2023-11-24 21:53:04,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:04,249 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 136 flow [2023-11-24 21:53:04,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-11-24 21:53:04,250 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-11-24 21:53:04,251 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 136 flow [2023-11-24 21:53:04,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:04,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:04,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:04,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:53:04,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-24 21:53:04,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:04,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2042652943, now seen corresponding path program 1 times [2023-11-24 21:53:04,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:04,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470039596] [2023-11-24 21:53:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:04,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:04,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:04,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470039596] [2023-11-24 21:53:04,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470039596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:04,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:04,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:53:04,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019118218] [2023-11-24 21:53:04,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:04,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:04,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:04,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:04,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:04,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2023-11-24 21:53:04,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:04,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:04,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2023-11-24 21:53:04,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:04,680 INFO L124 PetriNetUnfolderBase]: 598/1424 cut-off events. [2023-11-24 21:53:04,680 INFO L125 PetriNetUnfolderBase]: For 381/381 co-relation queries the response was YES. [2023-11-24 21:53:04,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3065 conditions, 1424 events. 598/1424 cut-off events. For 381/381 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9078 event pairs, 95 based on Foata normal form. 768/2128 useless extension candidates. Maximal degree in co-relation 3052. Up to 815 conditions per place. [2023-11-24 21:53:04,693 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 21 selfloop transitions, 8 changer transitions 0/49 dead transitions. [2023-11-24 21:53:04,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 219 flow [2023-11-24 21:53:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-24 21:53:04,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-24 21:53:04,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-24 21:53:04,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-24 21:53:04,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:04,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-24 21:53:04,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:04,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:04,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:04,697 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 136 flow. Second operand 3 states and 147 transitions. [2023-11-24 21:53:04,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 219 flow [2023-11-24 21:53:04,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:53:04,703 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 142 flow [2023-11-24 21:53:04,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-11-24 21:53:04,705 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-11-24 21:53:04,705 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 142 flow [2023-11-24 21:53:04,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:04,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:04,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:04,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:53:04,706 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-24 21:53:04,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:04,706 INFO L85 PathProgramCache]: Analyzing trace with hash 433299775, now seen corresponding path program 1 times [2023-11-24 21:53:04,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:04,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592109414] [2023-11-24 21:53:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:04,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:04,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:04,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592109414] [2023-11-24 21:53:04,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592109414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:04,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:04,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:53:04,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644662963] [2023-11-24 21:53:04,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:04,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:53:04,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:53:04,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:53:04,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2023-11-24 21:53:04,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:04,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:04,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2023-11-24 21:53:04,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:05,255 INFO L124 PetriNetUnfolderBase]: 971/2342 cut-off events. [2023-11-24 21:53:05,256 INFO L125 PetriNetUnfolderBase]: For 672/702 co-relation queries the response was YES. [2023-11-24 21:53:05,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5528 conditions, 2342 events. 971/2342 cut-off events. For 672/702 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17380 event pairs, 52 based on Foata normal form. 24/2350 useless extension candidates. Maximal degree in co-relation 5516. Up to 1117 conditions per place. [2023-11-24 21:53:05,276 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 43 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2023-11-24 21:53:05,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 372 flow [2023-11-24 21:53:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:53:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:53:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2023-11-24 21:53:05,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-24 21:53:05,278 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 204 transitions. [2023-11-24 21:53:05,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 204 transitions. [2023-11-24 21:53:05,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:05,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 204 transitions. [2023-11-24 21:53:05,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:05,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:05,281 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:05,281 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 142 flow. Second operand 4 states and 204 transitions. [2023-11-24 21:53:05,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 372 flow [2023-11-24 21:53:05,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:05,285 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 213 flow [2023-11-24 21:53:05,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-11-24 21:53:05,286 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-11-24 21:53:05,286 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 213 flow [2023-11-24 21:53:05,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:05,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:05,287 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:05,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:53:05,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-24 21:53:05,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:05,288 INFO L85 PathProgramCache]: Analyzing trace with hash -750422013, now seen corresponding path program 1 times [2023-11-24 21:53:05,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:05,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329885751] [2023-11-24 21:53:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:05,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:53:05,310 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:53:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:53:05,339 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:53:05,339 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:53:05,339 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-11-24 21:53:05,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (9 of 11 remaining) [2023-11-24 21:53:05,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-11-24 21:53:05,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-11-24 21:53:05,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-11-24 21:53:05,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-11-24 21:53:05,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2023-11-24 21:53:05,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 11 remaining) [2023-11-24 21:53:05,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2023-11-24 21:53:05,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2023-11-24 21:53:05,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2023-11-24 21:53:05,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:53:05,342 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-24 21:53:05,343 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:53:05,343 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-24 21:53:05,390 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:53:05,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 270 flow [2023-11-24 21:53:05,411 INFO L124 PetriNetUnfolderBase]: 7/92 cut-off events. [2023-11-24 21:53:05,411 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-24 21:53:05,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 92 events. 7/92 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 264 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 108. Up to 5 conditions per place. [2023-11-24 21:53:05,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 107 transitions, 270 flow [2023-11-24 21:53:05,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 61 transitions, 153 flow [2023-11-24 21:53:05,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:53:05,416 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;@9cf0423, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:53:05,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-24 21:53:05,417 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:53:05,418 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:53:05,418 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:53:05,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:05,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:53:05,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:53:05,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:05,419 INFO L85 PathProgramCache]: Analyzing trace with hash 15644, now seen corresponding path program 1 times [2023-11-24 21:53:05,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:05,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254333491] [2023-11-24 21:53:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:05,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:05,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:05,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254333491] [2023-11-24 21:53:05,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254333491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:05,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:05,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:53:05,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104342608] [2023-11-24 21:53:05,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:05,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:05,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:05,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:05,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:05,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 107 [2023-11-24 21:53:05,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:05,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:05,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 107 [2023-11-24 21:53:05,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:10,116 INFO L124 PetriNetUnfolderBase]: 23102/33235 cut-off events. [2023-11-24 21:53:10,116 INFO L125 PetriNetUnfolderBase]: For 4208/4208 co-relation queries the response was YES. [2023-11-24 21:53:10,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63223 conditions, 33235 events. 23102/33235 cut-off events. For 4208/4208 co-relation queries the response was YES. Maximal size of possible extension queue 1364. Compared 224375 event pairs, 18093 based on Foata normal form. 13682/45900 useless extension candidates. Maximal degree in co-relation 63207. Up to 28387 conditions per place. [2023-11-24 21:53:10,473 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 25 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-24 21:53:10,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 179 flow [2023-11-24 21:53:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2023-11-24 21:53:10,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327102803738317 [2023-11-24 21:53:10,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 171 transitions. [2023-11-24 21:53:10,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 171 transitions. [2023-11-24 21:53:10,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:10,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 171 transitions. [2023-11-24 21:53:10,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:10,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:10,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:10,478 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 153 flow. Second operand 3 states and 171 transitions. [2023-11-24 21:53:10,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 179 flow [2023-11-24 21:53:10,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 172 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:10,486 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 122 flow [2023-11-24 21:53:10,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-24 21:53:10,488 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2023-11-24 21:53:10,488 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 122 flow [2023-11-24 21:53:10,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:10,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:10,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:53:10,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:53:10,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:53:10,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:10,490 INFO L85 PathProgramCache]: Analyzing trace with hash 15645, now seen corresponding path program 1 times [2023-11-24 21:53:10,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:10,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677865312] [2023-11-24 21:53:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:10,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:10,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:10,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677865312] [2023-11-24 21:53:10,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677865312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:10,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:10,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:53:10,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419898445] [2023-11-24 21:53:10,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:10,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:10,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:10,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:10,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:10,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 107 [2023-11-24 21:53:10,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:10,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:10,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 107 [2023-11-24 21:53:10,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:13,256 INFO L124 PetriNetUnfolderBase]: 17071/25079 cut-off events. [2023-11-24 21:53:13,256 INFO L125 PetriNetUnfolderBase]: For 1396/1396 co-relation queries the response was YES. [2023-11-24 21:53:13,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47208 conditions, 25079 events. 17071/25079 cut-off events. For 1396/1396 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 169425 event pairs, 13314 based on Foata normal form. 1365/25451 useless extension candidates. Maximal degree in co-relation 47198. Up to 21103 conditions per place. [2023-11-24 21:53:13,457 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 23 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-24 21:53:13,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 46 transitions, 166 flow [2023-11-24 21:53:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-11-24 21:53:13,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202492211838006 [2023-11-24 21:53:13,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-11-24 21:53:13,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-11-24 21:53:13,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:13,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-11-24 21:53:13,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:13,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:13,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:13,462 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 122 flow. Second operand 3 states and 167 transitions. [2023-11-24 21:53:13,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 46 transitions, 166 flow [2023-11-24 21:53:13,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 46 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:13,465 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 119 flow [2023-11-24 21:53:13,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-24 21:53:13,467 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -11 predicate places. [2023-11-24 21:53:13,467 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 119 flow [2023-11-24 21:53:13,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:13,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:13,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:13,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:53:13,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:53:13,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:13,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2034661029, now seen corresponding path program 1 times [2023-11-24 21:53:13,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:13,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657029216] [2023-11-24 21:53:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:13,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:13,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657029216] [2023-11-24 21:53:13,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657029216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:13,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:13,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:53:13,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753911747] [2023-11-24 21:53:13,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:13,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:13,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:13,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:13,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:13,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 107 [2023-11-24 21:53:13,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:13,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:13,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 107 [2023-11-24 21:53:13,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:18,304 INFO L124 PetriNetUnfolderBase]: 36336/52782 cut-off events. [2023-11-24 21:53:18,305 INFO L125 PetriNetUnfolderBase]: For 2305/2305 co-relation queries the response was YES. [2023-11-24 21:53:18,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99352 conditions, 52782 events. 36336/52782 cut-off events. For 2305/2305 co-relation queries the response was YES. Maximal size of possible extension queue 2129. Compared 376836 event pairs, 9261 based on Foata normal form. 0/50636 useless extension candidates. Maximal degree in co-relation 99341. Up to 29392 conditions per place. [2023-11-24 21:53:18,711 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 39 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-11-24 21:53:18,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 264 flow [2023-11-24 21:53:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-11-24 21:53:18,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638629283489096 [2023-11-24 21:53:18,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-11-24 21:53:18,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-11-24 21:53:18,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:18,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-11-24 21:53:18,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:18,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:18,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:18,920 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 119 flow. Second operand 3 states and 181 transitions. [2023-11-24 21:53:18,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 264 flow [2023-11-24 21:53:18,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:18,923 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 164 flow [2023-11-24 21:53:18,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-11-24 21:53:18,924 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-11-24 21:53:18,924 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 164 flow [2023-11-24 21:53:18,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:18,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:18,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:18,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:53:18,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:53:18,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash -46461627, now seen corresponding path program 1 times [2023-11-24 21:53:18,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:18,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704322607] [2023-11-24 21:53:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:18,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:19,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:19,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704322607] [2023-11-24 21:53:19,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704322607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:19,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:19,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:53:19,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591336596] [2023-11-24 21:53:19,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:19,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:19,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:19,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 107 [2023-11-24 21:53:19,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:19,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:19,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 107 [2023-11-24 21:53:19,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:19,555 INFO L124 PetriNetUnfolderBase]: 1597/3562 cut-off events. [2023-11-24 21:53:19,556 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2023-11-24 21:53:19,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 3562 events. 1597/3562 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 26295 event pairs, 245 based on Foata normal form. 2631/6063 useless extension candidates. Maximal degree in co-relation 7816. Up to 2169 conditions per place. [2023-11-24 21:53:19,607 INFO L140 encePairwiseOnDemand]: 97/107 looper letters, 25 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2023-11-24 21:53:19,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 266 flow [2023-11-24 21:53:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2023-11-24 21:53:19,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5700934579439252 [2023-11-24 21:53:19,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2023-11-24 21:53:19,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2023-11-24 21:53:19,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:19,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2023-11-24 21:53:19,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:19,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:19,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:19,614 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 164 flow. Second operand 3 states and 183 transitions. [2023-11-24 21:53:19,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 266 flow [2023-11-24 21:53:19,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:53:19,623 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 172 flow [2023-11-24 21:53:19,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-11-24 21:53:19,624 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-11-24 21:53:19,624 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 172 flow [2023-11-24 21:53:19,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:19,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:19,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:19,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:53:19,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:53:19,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:19,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1114425002, now seen corresponding path program 1 times [2023-11-24 21:53:19,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:19,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663953837] [2023-11-24 21:53:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:19,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:19,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:19,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663953837] [2023-11-24 21:53:19,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663953837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:19,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:19,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:53:19,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777254945] [2023-11-24 21:53:19,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:19,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:53:19,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:53:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:53:19,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 107 [2023-11-24 21:53:19,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:19,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:19,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 107 [2023-11-24 21:53:19,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:20,330 INFO L124 PetriNetUnfolderBase]: 2452/5468 cut-off events. [2023-11-24 21:53:20,331 INFO L125 PetriNetUnfolderBase]: For 1531/1591 co-relation queries the response was YES. [2023-11-24 21:53:20,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13283 conditions, 5468 events. 2452/5468 cut-off events. For 1531/1591 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44547 event pairs, 86 based on Foata normal form. 42/5490 useless extension candidates. Maximal degree in co-relation 13270. Up to 3063 conditions per place. [2023-11-24 21:53:20,549 INFO L140 encePairwiseOnDemand]: 101/107 looper letters, 53 selfloop transitions, 13 changer transitions 0/89 dead transitions. [2023-11-24 21:53:20,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 89 transitions, 466 flow [2023-11-24 21:53:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:53:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:53:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 255 transitions. [2023-11-24 21:53:20,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957943925233645 [2023-11-24 21:53:20,555 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 255 transitions. [2023-11-24 21:53:20,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 255 transitions. [2023-11-24 21:53:20,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:20,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 255 transitions. [2023-11-24 21:53:20,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:20,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:20,564 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:20,564 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 172 flow. Second operand 4 states and 255 transitions. [2023-11-24 21:53:20,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 89 transitions, 466 flow [2023-11-24 21:53:20,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:20,569 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 266 flow [2023-11-24 21:53:20,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2023-11-24 21:53:20,570 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2023-11-24 21:53:20,570 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 266 flow [2023-11-24 21:53:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:20,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:20,571 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:20,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:53:20,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:53:20,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1526174615, now seen corresponding path program 1 times [2023-11-24 21:53:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685900994] [2023-11-24 21:53:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:53:20,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:53:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:53:20,634 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:53:20,634 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:53:20,635 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 12 remaining) [2023-11-24 21:53:20,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 12 remaining) [2023-11-24 21:53:20,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-11-24 21:53:20,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-11-24 21:53:20,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-11-24 21:53:20,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-11-24 21:53:20,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 12 remaining) [2023-11-24 21:53:20,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 12 remaining) [2023-11-24 21:53:20,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-11-24 21:53:20,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-11-24 21:53:20,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 12 remaining) [2023-11-24 21:53:20,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 12 remaining) [2023-11-24 21:53:20,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 21:53:20,638 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-24 21:53:20,638 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:53:20,639 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-24 21:53:20,694 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:53:20,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 130 transitions, 340 flow [2023-11-24 21:53:20,710 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-24 21:53:20,710 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-24 21:53:20,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 108 events. 8/108 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 319 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 130. Up to 6 conditions per place. [2023-11-24 21:53:20,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 130 transitions, 340 flow [2023-11-24 21:53:20,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 69 transitions, 181 flow [2023-11-24 21:53:20,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:53:20,715 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;@9cf0423, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:53:20,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-24 21:53:20,717 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:53:20,717 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:53:20,717 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:53:20,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:20,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:53:20,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:53:20,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:20,718 INFO L85 PathProgramCache]: Analyzing trace with hash 19804, now seen corresponding path program 1 times [2023-11-24 21:53:20,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:20,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666961626] [2023-11-24 21:53:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:20,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:20,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:20,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666961626] [2023-11-24 21:53:20,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666961626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:20,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:20,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:53:20,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561132911] [2023-11-24 21:53:20,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:20,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:20,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:20,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:20,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:20,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 130 [2023-11-24 21:53:20,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:20,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:20,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 130 [2023-11-24 21:53:20,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:37,094 INFO L124 PetriNetUnfolderBase]: 114238/154835 cut-off events. [2023-11-24 21:53:37,094 INFO L125 PetriNetUnfolderBase]: For 26992/26992 co-relation queries the response was YES. [2023-11-24 21:53:37,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297976 conditions, 154835 events. 114238/154835 cut-off events. For 26992/26992 co-relation queries the response was YES. Maximal size of possible extension queue 5276. Compared 1082223 event pairs, 88749 based on Foata normal form. 65647/216394 useless extension candidates. Maximal degree in co-relation 297959. Up to 135395 conditions per place. [2023-11-24 21:53:38,082 INFO L140 encePairwiseOnDemand]: 118/130 looper letters, 29 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-24 21:53:38,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 213 flow [2023-11-24 21:53:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:53:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:53:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-11-24 21:53:38,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282051282051282 [2023-11-24 21:53:38,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-11-24 21:53:38,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-11-24 21:53:38,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:38,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-11-24 21:53:38,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:38,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:38,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:38,087 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 181 flow. Second operand 3 states and 206 transitions. [2023-11-24 21:53:38,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 213 flow [2023-11-24 21:53:38,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 55 transitions, 200 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-24 21:53:38,100 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 142 flow [2023-11-24 21:53:38,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2023-11-24 21:53:38,101 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -11 predicate places. [2023-11-24 21:53:38,101 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 142 flow [2023-11-24 21:53:38,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:38,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:38,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:53:38,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 21:53:38,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:53:38,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash 19805, now seen corresponding path program 1 times [2023-11-24 21:53:38,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:38,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950189241] [2023-11-24 21:53:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:38,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:38,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:38,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950189241] [2023-11-24 21:53:38,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950189241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:38,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:38,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:53:38,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458400081] [2023-11-24 21:53:38,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:38,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:38,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:38,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 130 [2023-11-24 21:53:38,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:38,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:38,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 130 [2023-11-24 21:53:38,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand