./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ --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 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:31:45,597 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:31:45,717 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 22:31:45,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:31:45,725 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:31:45,761 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:31:45,762 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:31:45,763 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:31:45,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:31:45,769 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:31:45,771 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:31:45,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:31:45,772 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:31:45,774 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:31:45,775 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:31:45,775 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:31:45,776 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:31:45,776 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:31:45,777 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 22:31:45,777 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 22:31:45,778 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 22:31:45,778 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:31:45,779 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 22:31:45,779 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:31:45,780 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:31:45,781 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:31:45,782 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:31:45,782 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:31:45,783 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:31:45,783 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:31:45,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:31:45,785 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:31:45,785 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:31:45,786 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:31:45,786 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:31:45,786 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:31:45,787 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:31:45,787 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:31:45,787 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:31:45,787 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_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 [2023-11-23 22:31:46,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:31:46,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:31:46,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:31:46,098 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:31:46,098 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:31:46,100 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread/fib_safe-10.i [2023-11-23 22:31:49,443 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:31:49,749 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:31:49,750 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/sv-benchmarks/c/pthread/fib_safe-10.i [2023-11-23 22:31:49,771 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/data/1aabf3ae1/e1e0d55824ff4b599c0d239e42f9d063/FLAG315378511 [2023-11-23 22:31:49,787 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/data/1aabf3ae1/e1e0d55824ff4b599c0d239e42f9d063 [2023-11-23 22:31:49,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:31:49,792 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:31:49,793 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:31:49,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:31:49,799 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:31:49,800 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:31:49" (1/1) ... [2023-11-23 22:31:49,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d7d99ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:49, skipping insertion in model container [2023-11-23 22:31:49,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:31:49" (1/1) ... [2023-11-23 22:31:49,867 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:31:50,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:31:50,301 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:31:50,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:31:50,393 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:31:50,394 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:31:50,402 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:31:50,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50 WrapperNode [2023-11-23 22:31:50,403 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:31:50,404 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:31:50,405 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:31:50,405 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:31:50,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,455 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,485 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2023-11-23 22:31:50,486 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:31:50,487 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:31:50,487 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:31:50,487 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:31:50,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,505 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,506 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,520 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,526 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,532 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,539 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:31:50,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:31:50,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:31:50,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:31:50,546 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (1/1) ... [2023-11-23 22:31:50,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:31:50,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:50,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:31:50,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:31:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-23 22:31:50,632 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-23 22:31:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-23 22:31:50,633 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-23 22:31:50,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 22:31:50,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:31:50,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:31:50,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:31:50,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:31:50,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 22:31:50,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:31:50,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:31:50,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:31:50,637 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:31:50,783 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:31:50,786 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:31:51,071 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:31:51,248 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:31:51,249 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 22:31:51,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:31:51 BoogieIcfgContainer [2023-11-23 22:31:51,250 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:31:51,253 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:31:51,253 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:31:51,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:31:51,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:31:49" (1/3) ... [2023-11-23 22:31:51,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75baa7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:31:51, skipping insertion in model container [2023-11-23 22:31:51,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:31:50" (2/3) ... [2023-11-23 22:31:51,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75baa7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:31:51, skipping insertion in model container [2023-11-23 22:31:51,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:31:51" (3/3) ... [2023-11-23 22:31:51,261 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2023-11-23 22:31:51,282 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:31:51,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-23 22:31:51,283 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:31:51,332 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 22:31:51,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 88 flow [2023-11-23 22:31:51,419 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-11-23 22:31:51,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:31:51,425 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. [2023-11-23 22:31:51,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 40 transitions, 88 flow [2023-11-23 22:31:51,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 38 transitions, 82 flow [2023-11-23 22:31:51,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:31:51,449 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;@5e2b474b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:31:51,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-23 22:31:51,455 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:31:51,455 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-23 22:31:51,455 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:31:51,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:51,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:31:51,457 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)] === [2023-11-23 22:31:51,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 265637985, now seen corresponding path program 1 times [2023-11-23 22:31:51,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:51,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252427100] [2023-11-23 22:31:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:51,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:51,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252427100] [2023-11-23 22:31:51,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252427100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:31:51,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:31:51,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:31:51,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132103984] [2023-11-23 22:31:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:31:51,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:31:51,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:51,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:31:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:31:51,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2023-11-23 22:31:51,979 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) [2023-11-23 22:31:51,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:51,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2023-11-23 22:31:51,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:52,173 INFO L124 PetriNetUnfolderBase]: 133/268 cut-off events. [2023-11-23 22:31:52,173 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:31:52,177 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. [2023-11-23 22:31:52,182 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 22 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-11-23 22:31:52,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 136 flow [2023-11-23 22:31:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:31:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:31:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-23 22:31:52,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2023-11-23 22:31:52,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-23 22:31:52,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-23 22:31:52,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:52,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-23 22:31:52,208 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) [2023-11-23 22:31:52,216 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) [2023-11-23 22:31:52,216 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) [2023-11-23 22:31:52,219 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 82 flow. Second operand 3 states and 79 transitions. [2023-11-23 22:31:52,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 136 flow [2023-11-23 22:31:52,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:31:52,227 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 74 flow [2023-11-23 22:31:52,229 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} [2023-11-23 22:31:52,234 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2023-11-23 22:31:52,235 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 74 flow [2023-11-23 22:31:52,235 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) [2023-11-23 22:31:52,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:52,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:31:52,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:31:52,239 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)] === [2023-11-23 22:31:52,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:52,240 INFO L85 PathProgramCache]: Analyzing trace with hash 265637986, now seen corresponding path program 1 times [2023-11-23 22:31:52,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:52,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111028967] [2023-11-23 22:31:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:52,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:52,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:52,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111028967] [2023-11-23 22:31:52,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111028967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:31:52,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:31:52,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:31:52,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354398715] [2023-11-23 22:31:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:31:52,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:31:52,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:52,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:31:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:31:52,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2023-11-23 22:31:52,517 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) [2023-11-23 22:31:52,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:52,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2023-11-23 22:31:52,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:52,599 INFO L124 PetriNetUnfolderBase]: 115/240 cut-off events. [2023-11-23 22:31:52,599 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-23 22:31:52,601 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. [2023-11-23 22:31:52,605 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-11-23 22:31:52,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 130 flow [2023-11-23 22:31:52,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:31:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:31:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-23 22:31:52,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-23 22:31:52,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-23 22:31:52,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-23 22:31:52,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:52,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-23 22:31:52,610 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) [2023-11-23 22:31:52,611 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) [2023-11-23 22:31:52,611 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) [2023-11-23 22:31:52,611 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 74 flow. Second operand 3 states and 78 transitions. [2023-11-23 22:31:52,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 130 flow [2023-11-23 22:31:52,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:31:52,614 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 72 flow [2023-11-23 22:31:52,615 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} [2023-11-23 22:31:52,616 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-11-23 22:31:52,616 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 72 flow [2023-11-23 22:31:52,616 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) [2023-11-23 22:31:52,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:52,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:52,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:31:52,617 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)] === [2023-11-23 22:31:52,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:52,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2003281308, now seen corresponding path program 1 times [2023-11-23 22:31:52,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:52,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535960210] [2023-11-23 22:31:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:52,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:52,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:52,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535960210] [2023-11-23 22:31:52,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535960210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:31:52,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:31:52,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:31:52,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172013731] [2023-11-23 22:31:52,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:31:52,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:31:52,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:52,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:31:52,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:31:52,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2023-11-23 22:31:52,716 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) [2023-11-23 22:31:52,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:52,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2023-11-23 22:31:52,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:52,861 INFO L124 PetriNetUnfolderBase]: 118/242 cut-off events. [2023-11-23 22:31:52,863 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-23 22:31:52,864 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. [2023-11-23 22:31:52,866 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-11-23 22:31:52,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 130 flow [2023-11-23 22:31:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:31:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:31:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-23 22:31:52,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-23 22:31:52,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-23 22:31:52,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-23 22:31:52,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:52,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-23 22:31:52,871 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) [2023-11-23 22:31:52,872 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) [2023-11-23 22:31:52,872 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) [2023-11-23 22:31:52,873 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 72 flow. Second operand 3 states and 76 transitions. [2023-11-23 22:31:52,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 130 flow [2023-11-23 22:31:52,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:31:52,875 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 70 flow [2023-11-23 22:31:52,876 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} [2023-11-23 22:31:52,877 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-11-23 22:31:52,877 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 70 flow [2023-11-23 22:31:52,878 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) [2023-11-23 22:31:52,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:52,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:52,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:31:52,878 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)] === [2023-11-23 22:31:52,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:52,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2003281307, now seen corresponding path program 1 times [2023-11-23 22:31:52,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:52,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872261945] [2023-11-23 22:31:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:52,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:52,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:52,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872261945] [2023-11-23 22:31:52,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872261945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:31:52,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:31:52,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:31:52,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609624043] [2023-11-23 22:31:52,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:31:52,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:31:52,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:52,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:31:52,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:31:52,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2023-11-23 22:31:52,980 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) [2023-11-23 22:31:52,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:52,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2023-11-23 22:31:52,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:53,044 INFO L124 PetriNetUnfolderBase]: 115/238 cut-off events. [2023-11-23 22:31:53,044 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-23 22:31:53,045 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. [2023-11-23 22:31:53,047 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-23 22:31:53,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 126 flow [2023-11-23 22:31:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:31:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:31:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-23 22:31:53,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-23 22:31:53,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-23 22:31:53,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-23 22:31:53,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:53,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-23 22:31:53,052 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) [2023-11-23 22:31:53,053 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) [2023-11-23 22:31:53,053 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) [2023-11-23 22:31:53,053 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 70 flow. Second operand 3 states and 78 transitions. [2023-11-23 22:31:53,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 126 flow [2023-11-23 22:31:53,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:31:53,056 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 68 flow [2023-11-23 22:31:53,056 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} [2023-11-23 22:31:53,057 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2023-11-23 22:31:53,057 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 68 flow [2023-11-23 22:31:53,058 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) [2023-11-23 22:31:53,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:53,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:53,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:31:53,059 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)] === [2023-11-23 22:31:53,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash 581954235, now seen corresponding path program 1 times [2023-11-23 22:31:53,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:53,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077028702] [2023-11-23 22:31:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:53,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:53,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:53,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077028702] [2023-11-23 22:31:53,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077028702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:31:53,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:31:53,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:31:53,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410597375] [2023-11-23 22:31:53,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:31:53,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:31:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:31:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:31:53,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-23 22:31:53,127 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) [2023-11-23 22:31:53,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:53,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-23 22:31:53,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:53,198 INFO L124 PetriNetUnfolderBase]: 133/265 cut-off events. [2023-11-23 22:31:53,199 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-23 22:31:53,200 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. [2023-11-23 22:31:53,202 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-11-23 22:31:53,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 130 flow [2023-11-23 22:31:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:31:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:31:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-23 22:31:53,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2023-11-23 22:31:53,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-23 22:31:53,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-23 22:31:53,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:53,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-23 22:31:53,215 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) [2023-11-23 22:31:53,218 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) [2023-11-23 22:31:53,218 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) [2023-11-23 22:31:53,219 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 68 flow. Second operand 3 states and 82 transitions. [2023-11-23 22:31:53,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 130 flow [2023-11-23 22:31:53,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:31:53,222 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 76 flow [2023-11-23 22:31:53,223 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} [2023-11-23 22:31:53,226 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-11-23 22:31:53,226 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 76 flow [2023-11-23 22:31:53,227 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) [2023-11-23 22:31:53,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:53,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:53,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:31:53,228 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)] === [2023-11-23 22:31:53,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash 81967731, now seen corresponding path program 1 times [2023-11-23 22:31:53,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:53,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601499717] [2023-11-23 22:31:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:53,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:53,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:53,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601499717] [2023-11-23 22:31:53,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601499717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:53,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993294336] [2023-11-23 22:31:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:53,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:53,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:53,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:53,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:31:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:53,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:31:53,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:53,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:53,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993294336] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:31:53,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:31:53,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 22:31:53,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281824995] [2023-11-23 22:31:53,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:31:53,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:31:53,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:53,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:31:53,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:31:53,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-23 22:31:53,536 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) [2023-11-23 22:31:53,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:53,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-23 22:31:53,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:53,650 INFO L124 PetriNetUnfolderBase]: 187/346 cut-off events. [2023-11-23 22:31:53,651 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:31:53,652 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. [2023-11-23 22:31:53,655 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 40 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-11-23 22:31:53,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 226 flow [2023-11-23 22:31:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:31:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:31:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2023-11-23 22:31:53,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2023-11-23 22:31:53,657 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 162 transitions. [2023-11-23 22:31:53,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 162 transitions. [2023-11-23 22:31:53,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:53,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 162 transitions. [2023-11-23 22:31:53,659 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) [2023-11-23 22:31:53,660 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) [2023-11-23 22:31:53,661 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) [2023-11-23 22:31:53,661 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 76 flow. Second operand 6 states and 162 transitions. [2023-11-23 22:31:53,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 226 flow [2023-11-23 22:31:53,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:31:53,663 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 110 flow [2023-11-23 22:31:53,663 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} [2023-11-23 22:31:53,664 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-23 22:31:53,665 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 110 flow [2023-11-23 22:31:53,665 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) [2023-11-23 22:31:53,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:53,665 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:53,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:53,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:53,887 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)] === [2023-11-23 22:31:53,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:53,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2134763333, now seen corresponding path program 2 times [2023-11-23 22:31:53,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:53,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865646837] [2023-11-23 22:31:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:53,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:54,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865646837] [2023-11-23 22:31:54,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865646837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:54,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042813813] [2023-11-23 22:31:54,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:31:54,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:54,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:54,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:54,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:31:54,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 22:31:54,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:31:54,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:31:54,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 22:31:54,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:31:54,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042813813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:31:54,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:31:54,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-11-23 22:31:54,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985615857] [2023-11-23 22:31:54,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:31:54,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:31:54,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:31:54,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=46, Unknown=1, NotChecked=0, Total=72 [2023-11-23 22:31:54,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2023-11-23 22:31:54,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) [2023-11-23 22:31:54,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:54,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2023-11-23 22:31:54,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:55,182 INFO L124 PetriNetUnfolderBase]: 187/337 cut-off events. [2023-11-23 22:31:55,183 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-23 22:31:55,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 337 events. 187/337 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 991 event pairs, 104 based on Foata normal form. 9/337 useless extension candidates. Maximal degree in co-relation 772. Up to 258 conditions per place. [2023-11-23 22:31:55,187 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 19 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2023-11-23 22:31:55,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 174 flow [2023-11-23 22:31:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:31:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:31:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2023-11-23 22:31:55,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2023-11-23 22:31:55,189 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 92 transitions. [2023-11-23 22:31:55,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 92 transitions. [2023-11-23 22:31:55,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:55,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 92 transitions. [2023-11-23 22:31:55,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:55,191 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) [2023-11-23 22:31:55,191 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) [2023-11-23 22:31:55,191 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 110 flow. Second operand 4 states and 92 transitions. [2023-11-23 22:31:55,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 174 flow [2023-11-23 22:31:55,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 160 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-23 22:31:55,195 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 94 flow [2023-11-23 22:31:55,195 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} [2023-11-23 22:31:55,196 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-11-23 22:31:55,196 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 94 flow [2023-11-23 22:31:55,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) [2023-11-23 22:31:55,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:55,197 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:55,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:55,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:55,417 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)] === [2023-11-23 22:31:55,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:55,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2134762226, now seen corresponding path program 1 times [2023-11-23 22:31:55,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:55,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076685729] [2023-11-23 22:31:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:55,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:55,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:55,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076685729] [2023-11-23 22:31:55,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076685729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:55,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915306227] [2023-11-23 22:31:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:55,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:55,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:55,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:55,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:31:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:55,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:31:55,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:55,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:55,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915306227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:31:55,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:31:55,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-23 22:31:55,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836927929] [2023-11-23 22:31:55,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:31:55,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:31:55,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:55,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:31:55,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:31:55,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-23 22:31:55,739 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) [2023-11-23 22:31:55,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:55,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-23 22:31:55,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:55,949 INFO L124 PetriNetUnfolderBase]: 277/472 cut-off events. [2023-11-23 22:31:55,949 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-11-23 22:31:55,951 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. [2023-11-23 22:31:55,955 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 75 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2023-11-23 22:31:55,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 98 transitions, 422 flow [2023-11-23 22:31:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:31:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-23 22:31:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2023-11-23 22:31:55,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-23 22:31:55,958 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 320 transitions. [2023-11-23 22:31:55,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 320 transitions. [2023-11-23 22:31:55,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:55,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 320 transitions. [2023-11-23 22:31:55,960 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) [2023-11-23 22:31:55,962 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) [2023-11-23 22:31:55,962 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) [2023-11-23 22:31:55,962 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 94 flow. Second operand 12 states and 320 transitions. [2023-11-23 22:31:55,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 98 transitions, 422 flow [2023-11-23 22:31:55,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 98 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:31:55,967 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 177 flow [2023-11-23 22:31:55,967 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} [2023-11-23 22:31:55,968 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2023-11-23 22:31:55,968 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 177 flow [2023-11-23 22:31:55,969 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) [2023-11-23 22:31:55,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:55,969 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:55,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:56,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:56,181 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)] === [2023-11-23 22:31:56,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash -226475506, now seen corresponding path program 2 times [2023-11-23 22:31:56,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:56,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190117078] [2023-11-23 22:31:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:56,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:56,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190117078] [2023-11-23 22:31:56,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190117078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:56,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277982450] [2023-11-23 22:31:56,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:31:56,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:56,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:56,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:56,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:31:56,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:31:56,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:31:56,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:31:56,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:56,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277982450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:31:56,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:31:56,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-23 22:31:56,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752160676] [2023-11-23 22:31:56,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:31:56,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 22:31:56,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 22:31:56,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-23 22:31:56,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-23 22:31:56,892 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) [2023-11-23 22:31:56,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:56,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-23 22:31:56,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:57,341 INFO L124 PetriNetUnfolderBase]: 493/796 cut-off events. [2023-11-23 22:31:57,341 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2023-11-23 22:31:57,346 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. [2023-11-23 22:31:57,352 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 147 selfloop transitions, 23 changer transitions 0/182 dead transitions. [2023-11-23 22:31:57,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 182 transitions, 877 flow [2023-11-23 22:31:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 22:31:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-23 22:31:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 638 transitions. [2023-11-23 22:31:57,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645833333333333 [2023-11-23 22:31:57,356 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 638 transitions. [2023-11-23 22:31:57,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 638 transitions. [2023-11-23 22:31:57,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:57,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 638 transitions. [2023-11-23 22:31:57,360 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) [2023-11-23 22:31:57,364 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) [2023-11-23 22:31:57,365 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) [2023-11-23 22:31:57,365 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 177 flow. Second operand 24 states and 638 transitions. [2023-11-23 22:31:57,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 182 transitions, 877 flow [2023-11-23 22:31:57,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 182 transitions, 805 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-23 22:31:57,381 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 297 flow [2023-11-23 22:31:57,382 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} [2023-11-23 22:31:57,383 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2023-11-23 22:31:57,383 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 297 flow [2023-11-23 22:31:57,383 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) [2023-11-23 22:31:57,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:57,384 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:57,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:57,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:57,602 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)] === [2023-11-23 22:31:57,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:57,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1728230386, now seen corresponding path program 3 times [2023-11-23 22:31:57,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:57,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337159164] [2023-11-23 22:31:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:57,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:59,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:59,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337159164] [2023-11-23 22:31:59,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337159164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:59,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969739221] [2023-11-23 22:31:59,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:31:59,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:59,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:59,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:59,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6637ec92-be9a-4d87-b231-ed4f84563f8a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:31:59,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-23 22:31:59,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:31:59,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-23 22:31:59,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:01,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:04,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969739221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:04,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:04,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 83 [2023-11-23 22:32:04,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244686584] [2023-11-23 22:32:04,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:04,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-23 22:32:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-23 22:32:04,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1009, Invalid=5963, Unknown=0, NotChecked=0, Total=6972 [2023-11-23 22:32:04,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2023-11-23 22:32:04,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 297 flow. Second operand has 84 states, 84 states have (on average 14.202380952380953) internal successors, (1193), 84 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:04,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:04,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2023-11-23 22:32:04,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand