./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/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_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/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_5dd83406-42d0-46e7-b7ac-9050c22cc404/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 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:44:20,623 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:44:20,692 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:44:20,698 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:44:20,699 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:44:20,724 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:44:20,725 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:44:20,726 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:44:20,727 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:44:20,727 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:44:20,728 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:44:20,729 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:44:20,730 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:44:20,731 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:44:20,731 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:44:20,732 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:44:20,733 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:44:20,734 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:44:20,734 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:44:20,735 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:44:20,736 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:44:20,737 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:44:20,738 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:44:20,738 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:44:20,739 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:44:20,740 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:44:20,741 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:44:20,741 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:44:20,742 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:44:20,742 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:44:20,743 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:44:20,744 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:44:20,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:20,745 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:44:20,746 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:44:20,746 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:44:20,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:44:20,747 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:44:20,748 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:44:20,748 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:44:20,749 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:44:20,749 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_5dd83406-42d0-46e7-b7ac-9050c22cc404/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 [2023-11-24 21:44:21,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:44:21,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:44:21,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:44:21,062 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:44:21,063 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:44:21,065 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread/fib_unsafe-11.i [2023-11-24 21:44:24,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:44:24,403 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:44:24,403 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/sv-benchmarks/c/pthread/fib_unsafe-11.i [2023-11-24 21:44:24,423 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/data/be35241c3/665e769b4fde49909b03565aa3323e20/FLAG79121da11 [2023-11-24 21:44:24,438 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/data/be35241c3/665e769b4fde49909b03565aa3323e20 [2023-11-24 21:44:24,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:44:24,443 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:44:24,444 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:24,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:44:24,449 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:44:24,450 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:24" (1/1) ... [2023-11-24 21:44:24,451 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6799aa9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:24, skipping insertion in model container [2023-11-24 21:44:24,451 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:24" (1/1) ... [2023-11-24 21:44:24,504 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:44:24,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:24,958 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:44:25,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:25,067 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:44:25,067 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:44:25,075 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:44:25,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25 WrapperNode [2023-11-24 21:44:25,076 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:25,077 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:44:25,078 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:44:25,078 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:44:25,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,101 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,126 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2023-11-24 21:44:25,126 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:44:25,127 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:44:25,127 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:44:25,127 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:44:25,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,143 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,159 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-24 21:44:25,159 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,160 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,171 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,173 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,175 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:44:25,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:44:25,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:44:25,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:44:25,181 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (1/1) ... [2023-11-24 21:44:25,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:25,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:44:25,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:44:25,258 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-24 21:44:25,258 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-24 21:44:25,259 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-24 21:44:25,259 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-24 21:44:25,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:44:25,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:44:25,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:44:25,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:44:25,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:44:25,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:44:25,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:44:25,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:44:25,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:44:25,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:44:25,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:44:25,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:44:25,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:44:25,264 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 21:44:25,422 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:44:25,424 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:44:25,689 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:44:25,955 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:44:25,960 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:44:25,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:44:25 BoogieIcfgContainer [2023-11-24 21:44:25,962 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:44:25,971 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:44:25,972 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:44:25,976 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:44:25,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:44:24" (1/3) ... [2023-11-24 21:44:25,977 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1213f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:44:25, skipping insertion in model container [2023-11-24 21:44:25,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:25" (2/3) ... [2023-11-24 21:44:25,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1213f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:44:25, skipping insertion in model container [2023-11-24 21:44:25,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:44:25" (3/3) ... [2023-11-24 21:44:25,985 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2023-11-24 21:44:26,002 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:44:26,003 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-24 21:44:26,003 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:44:26,047 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:44:26,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 88 flow [2023-11-24 21:44:26,148 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-11-24 21:44:26,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:44:26,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 38 events. 5/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2023-11-24 21:44:26,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 40 transitions, 88 flow [2023-11-24 21:44:26,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 38 transitions, 82 flow [2023-11-24 21:44:26,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:44:26,175 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;@1589af21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:44:26,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-24 21:44:26,180 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:44:26,180 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-24 21:44:26,181 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:44:26,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:26,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:44:26,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:26,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:26,188 INFO L85 PathProgramCache]: Analyzing trace with hash 265637985, now seen corresponding path program 1 times [2023-11-24 21:44:26,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:26,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511957946] [2023-11-24 21:44:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:26,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:26,628 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 21:44:26,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:26,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511957946] [2023-11-24 21:44:26,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511957946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:26,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:26,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:26,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361947682] [2023-11-24 21:44:26,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:26,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:26,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:26,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:26,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:26,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2023-11-24 21:44:26,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:44:26,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:26,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2023-11-24 21:44:26,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:26,841 INFO L124 PetriNetUnfolderBase]: 133/268 cut-off events. [2023-11-24 21:44:26,841 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 21:44:26,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 268 events. 133/268 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 911 event pairs, 56 based on Foata normal form. 18/266 useless extension candidates. Maximal degree in co-relation 468. Up to 151 conditions per place. [2023-11-24 21:44:26,851 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 22 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-11-24 21:44:26,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 136 flow [2023-11-24 21:44:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-24 21:44:26,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2023-11-24 21:44:26,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-24 21:44:26,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-24 21:44:26,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:26,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-24 21:44:26,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 21:44:26,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:44:26,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:44:26,879 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 82 flow. Second operand 3 states and 79 transitions. [2023-11-24 21:44:26,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 136 flow [2023-11-24 21:44:26,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:26,885 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 74 flow [2023-11-24 21:44:26,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-24 21:44:26,893 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2023-11-24 21:44:26,894 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 74 flow [2023-11-24 21:44:26,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:44:26,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:26,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:44:26,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:44:26,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:26,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:26,901 INFO L85 PathProgramCache]: Analyzing trace with hash 265637986, now seen corresponding path program 1 times [2023-11-24 21:44:26,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:26,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587513801] [2023-11-24 21:44:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:26,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:27,152 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 21:44:27,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:27,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587513801] [2023-11-24 21:44:27,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587513801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:27,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:27,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70774405] [2023-11-24 21:44:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:27,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:27,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:27,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:27,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2023-11-24 21:44:27,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 21:44:27,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:27,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2023-11-24 21:44:27,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:27,324 INFO L124 PetriNetUnfolderBase]: 115/240 cut-off events. [2023-11-24 21:44:27,325 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-24 21:44:27,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 240 events. 115/240 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 810 event pairs, 56 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 423. Up to 150 conditions per place. [2023-11-24 21:44:27,333 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-11-24 21:44:27,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 130 flow [2023-11-24 21:44:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-24 21:44:27,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-24 21:44:27,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-24 21:44:27,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-24 21:44:27,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:27,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-24 21:44:27,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 21:44:27,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:44:27,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:44:27,342 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 74 flow. Second operand 3 states and 78 transitions. [2023-11-24 21:44:27,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 130 flow [2023-11-24 21:44:27,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:27,346 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 72 flow [2023-11-24 21:44:27,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-24 21:44:27,347 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-11-24 21:44:27,347 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 72 flow [2023-11-24 21:44:27,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 21:44:27,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:27,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:27,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:44:27,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:27,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2003281308, now seen corresponding path program 1 times [2023-11-24 21:44:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:27,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237686675] [2023-11-24 21:44:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:27,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:27,419 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 21:44:27,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:27,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237686675] [2023-11-24 21:44:27,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237686675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:27,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:27,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:27,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745985651] [2023-11-24 21:44:27,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:27,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:27,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:27,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2023-11-24 21:44:27,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 21:44:27,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:27,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2023-11-24 21:44:27,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:27,526 INFO L124 PetriNetUnfolderBase]: 118/242 cut-off events. [2023-11-24 21:44:27,526 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-24 21:44:27,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 242 events. 118/242 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 798 event pairs, 58 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 431. Up to 156 conditions per place. [2023-11-24 21:44:27,530 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-11-24 21:44:27,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 130 flow [2023-11-24 21:44:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-24 21:44:27,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-24 21:44:27,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-24 21:44:27,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-24 21:44:27,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:27,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-24 21:44:27,534 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 21:44:27,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:44:27,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:44:27,536 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 72 flow. Second operand 3 states and 76 transitions. [2023-11-24 21:44:27,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 130 flow [2023-11-24 21:44:27,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:27,538 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 70 flow [2023-11-24 21:44:27,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-24 21:44:27,539 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-11-24 21:44:27,539 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 70 flow [2023-11-24 21:44:27,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 21:44:27,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:27,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:27,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:44:27,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:27,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:27,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2003281307, now seen corresponding path program 1 times [2023-11-24 21:44:27,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:27,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641713921] [2023-11-24 21:44:27,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:27,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:27,703 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 21:44:27,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:27,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641713921] [2023-11-24 21:44:27,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641713921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:27,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:27,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:27,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106170180] [2023-11-24 21:44:27,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:27,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:27,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:27,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:27,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:27,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2023-11-24 21:44:27,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 21:44:27,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:27,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2023-11-24 21:44:27,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:27,795 INFO L124 PetriNetUnfolderBase]: 115/238 cut-off events. [2023-11-24 21:44:27,795 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-24 21:44:27,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 238 events. 115/238 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 795 event pairs, 56 based on Foata normal form. 3/223 useless extension candidates. Maximal degree in co-relation 421. Up to 150 conditions per place. [2023-11-24 21:44:27,801 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-24 21:44:27,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 126 flow [2023-11-24 21:44:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:27,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-24 21:44:27,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-24 21:44:27,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-24 21:44:27,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-24 21:44:27,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:27,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-24 21:44:27,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 21:44:27,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:44:27,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:44:27,813 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 70 flow. Second operand 3 states and 78 transitions. [2023-11-24 21:44:27,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 126 flow [2023-11-24 21:44:27,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:27,816 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 68 flow [2023-11-24 21:44:27,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-24 21:44:27,818 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2023-11-24 21:44:27,819 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 68 flow [2023-11-24 21:44:27,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 21:44:27,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:27,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:27,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:44:27,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:27,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:27,822 INFO L85 PathProgramCache]: Analyzing trace with hash 581954235, now seen corresponding path program 1 times [2023-11-24 21:44:27,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:27,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502119415] [2023-11-24 21:44:27,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:27,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:27,916 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 21:44:27,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502119415] [2023-11-24 21:44:27,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502119415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:27,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:27,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:27,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222681243] [2023-11-24 21:44:27,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:27,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:27,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:27,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:27,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-24 21:44:27,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 68 flow. Second operand has 3 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 21:44:27,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:27,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-24 21:44:27,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:28,006 INFO L124 PetriNetUnfolderBase]: 133/265 cut-off events. [2023-11-24 21:44:28,013 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-24 21:44:28,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 265 events. 133/265 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 867 event pairs, 20 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 475. Up to 145 conditions per place. [2023-11-24 21:44:28,016 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-11-24 21:44:28,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 130 flow [2023-11-24 21:44:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-24 21:44:28,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2023-11-24 21:44:28,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-24 21:44:28,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-24 21:44:28,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:28,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-24 21:44:28,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:44:28,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:44:28,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:44:28,023 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 68 flow. Second operand 3 states and 82 transitions. [2023-11-24 21:44:28,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 130 flow [2023-11-24 21:44:28,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:28,027 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 76 flow [2023-11-24 21:44:28,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-24 21:44:28,030 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-11-24 21:44:28,030 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 76 flow [2023-11-24 21:44:28,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 21:44:28,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:28,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:28,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:44:28,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:28,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash 81967731, now seen corresponding path program 1 times [2023-11-24 21:44:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141414961] [2023-11-24 21:44:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:28,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:28,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141414961] [2023-11-24 21:44:28,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141414961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:28,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670137598] [2023-11-24 21:44:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:28,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:28,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:28,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:28,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:44:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:28,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:44:28,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:28,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:28,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670137598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:28,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:28,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-24 21:44:28,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820460176] [2023-11-24 21:44:28,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:28,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:44:28,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:28,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:44:28,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:44:28,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-24 21:44:28,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 21:44:28,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:28,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-24 21:44:28,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:28,458 INFO L124 PetriNetUnfolderBase]: 187/346 cut-off events. [2023-11-24 21:44:28,458 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 21:44:28,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 346 events. 187/346 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1068 event pairs, 20 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 691. Up to 145 conditions per place. [2023-11-24 21:44:28,463 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 40 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-11-24 21:44:28,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 226 flow [2023-11-24 21:44:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:44:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:44:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2023-11-24 21:44:28,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2023-11-24 21:44:28,466 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 162 transitions. [2023-11-24 21:44:28,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 162 transitions. [2023-11-24 21:44:28,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:28,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 162 transitions. [2023-11-24 21:44:28,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 21:44:28,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:44:28,470 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 21:44:28,471 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 76 flow. Second operand 6 states and 162 transitions. [2023-11-24 21:44:28,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 226 flow [2023-11-24 21:44:28,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:28,475 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 110 flow [2023-11-24 21:44:28,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-11-24 21:44:28,479 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-24 21:44:28,479 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 110 flow [2023-11-24 21:44:28,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 21:44:28,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:28,479 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:28,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:28,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:28,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:28,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2134763333, now seen corresponding path program 2 times [2023-11-24 21:44:28,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:28,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152509978] [2023-11-24 21:44:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:28,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:28,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152509978] [2023-11-24 21:44:28,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152509978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:28,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872712976] [2023-11-24 21:44:28,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:44:28,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:28,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:28,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:28,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:44:28,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 21:44:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:44:28,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:44:28,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 21:44:29,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:44:29,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872712976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:29,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:44:29,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-11-24 21:44:29,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223190160] [2023-11-24 21:44:29,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:29,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:44:29,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:29,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:44:29,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:44:29,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2023-11-24 21:44:29,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 21:44:29,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:29,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2023-11-24 21:44:29,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:30,200 INFO L124 PetriNetUnfolderBase]: 190/340 cut-off events. [2023-11-24 21:44:30,200 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-24 21:44:30,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 340 events. 190/340 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 980 event pairs, 106 based on Foata normal form. 9/341 useless extension candidates. Maximal degree in co-relation 781. Up to 264 conditions per place. [2023-11-24 21:44:30,204 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 20 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2023-11-24 21:44:30,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 176 flow [2023-11-24 21:44:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:44:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:44:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2023-11-24 21:44:30,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2023-11-24 21:44:30,206 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 93 transitions. [2023-11-24 21:44:30,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 93 transitions. [2023-11-24 21:44:30,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:30,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 93 transitions. [2023-11-24 21:44:30,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 21:44:30,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 21:44:30,209 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 21:44:30,209 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 110 flow. Second operand 4 states and 93 transitions. [2023-11-24 21:44:30,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 176 flow [2023-11-24 21:44:30,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 162 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:30,233 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 94 flow [2023-11-24 21:44:30,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-11-24 21:44:30,234 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-11-24 21:44:30,234 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 94 flow [2023-11-24 21:44:30,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 21:44:30,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:30,235 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:30,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:30,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:30,441 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:30,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:30,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2134762226, now seen corresponding path program 1 times [2023-11-24 21:44:30,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:30,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049404060] [2023-11-24 21:44:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:30,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:30,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049404060] [2023-11-24 21:44:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049404060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457973524] [2023-11-24 21:44:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:30,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:30,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:30,555 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:30,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:44:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:30,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:44:30,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:30,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:30,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457973524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:30,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:30,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-24 21:44:30,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497355789] [2023-11-24 21:44:30,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:30,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:44:30,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:30,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:44:30,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:44:30,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-24 21:44:30,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:44:30,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:30,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-24 21:44:30,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:30,994 INFO L124 PetriNetUnfolderBase]: 277/472 cut-off events. [2023-11-24 21:44:30,995 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-11-24 21:44:30,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 472 events. 277/472 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1298 event pairs, 20 based on Foata normal form. 54/520 useless extension candidates. Maximal degree in co-relation 1105. Up to 118 conditions per place. [2023-11-24 21:44:31,000 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 75 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2023-11-24 21:44:31,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 98 transitions, 422 flow [2023-11-24 21:44:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:44:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:44:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2023-11-24 21:44:31,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-24 21:44:31,003 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 320 transitions. [2023-11-24 21:44:31,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 320 transitions. [2023-11-24 21:44:31,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:31,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 320 transitions. [2023-11-24 21:44:31,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 26.666666666666668) internal successors, (320), 12 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 21:44:31,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 40.0) internal successors, (520), 13 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 21:44:31,007 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 40.0) internal successors, (520), 13 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 21:44:31,007 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 94 flow. Second operand 12 states and 320 transitions. [2023-11-24 21:44:31,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 98 transitions, 422 flow [2023-11-24 21:44:31,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 98 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:31,014 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 177 flow [2023-11-24 21:44:31,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=177, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2023-11-24 21:44:31,017 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2023-11-24 21:44:31,017 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 177 flow [2023-11-24 21:44:31,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:44:31,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:31,018 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:31,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:31,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:31,225 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:31,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:31,225 INFO L85 PathProgramCache]: Analyzing trace with hash -226475506, now seen corresponding path program 2 times [2023-11-24 21:44:31,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:31,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179645557] [2023-11-24 21:44:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:31,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:31,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:31,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179645557] [2023-11-24 21:44:31,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179645557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:31,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044686517] [2023-11-24 21:44:31,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:44:31,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:31,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:31,521 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:31,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:44:31,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:44:31,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:44:31,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:44:31,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:31,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:31,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044686517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:31,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:31,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-24 21:44:31,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568698282] [2023-11-24 21:44:31,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:31,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 21:44:31,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:31,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 21:44:31,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:44:31,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-24 21:44:31,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 177 flow. Second operand has 25 states, 25 states have (on average 20.32) internal successors, (508), 25 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 21:44:31,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:31,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-24 21:44:31,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:32,327 INFO L124 PetriNetUnfolderBase]: 493/796 cut-off events. [2023-11-24 21:44:32,327 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2023-11-24 21:44:32,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2303 conditions, 796 events. 493/796 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2099 event pairs, 20 based on Foata normal form. 108/898 useless extension candidates. Maximal degree in co-relation 2284. Up to 190 conditions per place. [2023-11-24 21:44:32,337 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 147 selfloop transitions, 23 changer transitions 0/182 dead transitions. [2023-11-24 21:44:32,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 182 transitions, 877 flow [2023-11-24 21:44:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 21:44:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-24 21:44:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 638 transitions. [2023-11-24 21:44:32,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645833333333333 [2023-11-24 21:44:32,341 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 638 transitions. [2023-11-24 21:44:32,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 638 transitions. [2023-11-24 21:44:32,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:32,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 638 transitions. [2023-11-24 21:44:32,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 26.583333333333332) internal successors, (638), 24 states have internal predecessors, (638), 0 states have call successors, (0), 0 states 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 21:44:32,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 40.0) internal successors, (1000), 25 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states 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 21:44:32,348 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 40.0) internal successors, (1000), 25 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states 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 21:44:32,348 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 177 flow. Second operand 24 states and 638 transitions. [2023-11-24 21:44:32,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 182 transitions, 877 flow [2023-11-24 21:44:32,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 182 transitions, 805 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-24 21:44:32,361 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 297 flow [2023-11-24 21:44:32,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=297, PETRI_PLACES=87, PETRI_TRANSITIONS=50} [2023-11-24 21:44:32,362 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2023-11-24 21:44:32,362 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 297 flow [2023-11-24 21:44:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 20.32) internal successors, (508), 25 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 21:44:32,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:32,363 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:32,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:32,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:32,569 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:32,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:32,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1728230386, now seen corresponding path program 3 times [2023-11-24 21:44:32,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:32,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901765852] [2023-11-24 21:44:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:32,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:33,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901765852] [2023-11-24 21:44:33,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901765852] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97205804] [2023-11-24 21:44:33,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:44:33,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:33,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:33,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:33,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:44:33,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-24 21:44:33,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:44:33,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 21:44:33,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:33,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:34,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97205804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:34,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:34,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2023-11-24 21:44:34,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490619144] [2023-11-24 21:44:34,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:34,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-24 21:44:34,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-24 21:44:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-24 21:44:34,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-24 21:44:34,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 297 flow. Second operand has 27 states, 27 states have (on average 20.333333333333332) internal successors, (549), 27 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:34,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:34,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-24 21:44:34,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:34,493 INFO L124 PetriNetUnfolderBase]: 529/850 cut-off events. [2023-11-24 21:44:34,493 INFO L125 PetriNetUnfolderBase]: For 5553/5553 co-relation queries the response was YES. [2023-11-24 21:44:34,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2585 conditions, 850 events. 529/850 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2229 event pairs, 20 based on Foata normal form. 18/862 useless extension candidates. Maximal degree in co-relation 2554. Up to 178 conditions per place. [2023-11-24 21:44:34,506 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 159 selfloop transitions, 25 changer transitions 0/196 dead transitions. [2023-11-24 21:44:34,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 196 transitions, 969 flow [2023-11-24 21:44:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-24 21:44:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-24 21:44:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 680 transitions. [2023-11-24 21:44:34,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2023-11-24 21:44:34,510 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 680 transitions. [2023-11-24 21:44:34,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 680 transitions. [2023-11-24 21:44:34,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:34,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 680 transitions. [2023-11-24 21:44:34,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 26.153846153846153) internal successors, (680), 26 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 21:44:34,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 40.0) internal successors, (1080), 27 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states 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 21:44:34,518 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 40.0) internal successors, (1080), 27 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states 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 21:44:34,518 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 297 flow. Second operand 26 states and 680 transitions. [2023-11-24 21:44:34,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 196 transitions, 969 flow [2023-11-24 21:44:34,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 196 transitions, 869 flow, removed 39 selfloop flow, removed 11 redundant places. [2023-11-24 21:44:34,538 INFO L231 Difference]: Finished difference. Result has 103 places, 52 transitions, 273 flow [2023-11-24 21:44:34,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=273, PETRI_PLACES=103, PETRI_TRANSITIONS=52} [2023-11-24 21:44:34,539 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 63 predicate places. [2023-11-24 21:44:34,539 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 52 transitions, 273 flow [2023-11-24 21:44:34,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 20.333333333333332) internal successors, (549), 27 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:34,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:34,540 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:34,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:34,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:34,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 21:44:34,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:34,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2123103474, now seen corresponding path program 4 times [2023-11-24 21:44:34,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:34,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088360505] [2023-11-24 21:44:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:34,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:37,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088360505] [2023-11-24 21:44:37,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088360505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550221237] [2023-11-24 21:44:37,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:44:37,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:37,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:37,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:37,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83406-42d0-46e7-b7ac-9050c22cc404/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:44:37,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:44:37,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:44:37,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-24 21:44:37,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:39,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:42,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550221237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:42,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:42,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 90 [2023-11-24 21:44:42,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801542640] [2023-11-24 21:44:42,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:42,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-24 21:44:42,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:42,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-24 21:44:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1169, Invalid=7021, Unknown=0, NotChecked=0, Total=8190 [2023-11-24 21:44:42,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2023-11-24 21:44:42,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 52 transitions, 273 flow. Second operand has 91 states, 91 states have (on average 14.175824175824175) internal successors, (1290), 91 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 21:44:42,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:42,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2023-11-24 21:44:42,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand