./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl --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 89d9c43e2f37f1bac8114d01260f8a993f33530b50231d4afed1f3cf3859d385 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:33:42,079 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:33:42,189 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:33:42,194 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:33:42,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:33:42,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:33:42,243 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:33:42,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:33:42,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:33:42,250 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:33:42,251 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:33:42,252 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:33:42,252 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:33:42,254 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:33:42,254 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:33:42,255 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:33:42,255 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:33:42,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:33:42,256 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:33:42,257 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:33:42,257 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:33:42,283 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:33:42,284 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:33:42,284 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:33:42,285 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:33:42,285 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:33:42,286 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:33:42,287 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:33:42,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:33:42,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:42,289 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:33:42,290 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:33:42,290 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:33:42,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:33:42,290 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:33:42,291 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:33:42,291 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:33:42,291 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:33:42,292 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_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89d9c43e2f37f1bac8114d01260f8a993f33530b50231d4afed1f3cf3859d385 [2023-11-12 02:33:42,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:33:42,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:33:42,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:33:42,701 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:33:42,702 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:33:42,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread/fib_unsafe-10.i [2023-11-12 02:33:45,715 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:33:46,057 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:33:46,058 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/sv-benchmarks/c/pthread/fib_unsafe-10.i [2023-11-12 02:33:46,074 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/data/44f0c147f/1d003975c8044ca091d16fd0c07349cc/FLAG89f26dd07 [2023-11-12 02:33:46,089 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/data/44f0c147f/1d003975c8044ca091d16fd0c07349cc [2023-11-12 02:33:46,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:33:46,094 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:33:46,096 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:46,097 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:33:46,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:33:46,106 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d0ea0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46, skipping insertion in model container [2023-11-12 02:33:46,107 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,173 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:33:46,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:46,516 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:33:46,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:46,612 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:33:46,613 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:33:46,622 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:33:46,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46 WrapperNode [2023-11-12 02:33:46,623 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:46,624 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:46,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:33:46,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:33:46,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,710 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-11-12 02:33:46,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:46,712 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:33:46,712 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:33:46,712 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:33:46,724 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,737 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,750 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,761 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,764 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,771 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,774 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:33:46,775 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:33:46,776 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:33:46,776 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:33:46,777 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (1/1) ... [2023-11-12 02:33:46,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:46,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:46,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:33:46,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:33:46,881 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-12 02:33:46,882 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-12 02:33:46,882 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-12 02:33:46,883 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-12 02:33:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:33:46,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:33:46,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:33:46,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:33:46,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:33:46,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:33:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:33:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:33:46,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:33:46,887 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:33:47,111 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:33:47,114 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:33:47,368 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:33:47,377 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:33:47,377 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:33:47,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:47 BoogieIcfgContainer [2023-11-12 02:33:47,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:33:47,383 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:33:47,383 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:33:47,387 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:33:47,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:33:46" (1/3) ... [2023-11-12 02:33:47,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4884b4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:47, skipping insertion in model container [2023-11-12 02:33:47,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:46" (2/3) ... [2023-11-12 02:33:47,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4884b4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:47, skipping insertion in model container [2023-11-12 02:33:47,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:47" (3/3) ... [2023-11-12 02:33:47,390 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-10.i [2023-11-12 02:33:47,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:33:47,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-12 02:33:47,412 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:33:47,475 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:33:47,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 110 transitions, 228 flow [2023-11-12 02:33:47,637 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-12 02:33:47,637 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:33:47,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 108 events. 8/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-11-12 02:33:47,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 110 transitions, 228 flow [2023-11-12 02:33:47,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 108 transitions, 222 flow [2023-11-12 02:33:47,656 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:33:47,679 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 108 transitions, 222 flow [2023-11-12 02:33:47,687 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 108 transitions, 222 flow [2023-11-12 02:33:47,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 222 flow [2023-11-12 02:33:47,733 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-12 02:33:47,733 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:33:47,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 108 events. 8/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-11-12 02:33:47,739 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-11-12 02:33:53,085 INFO L134 LiptonReduction]: Checked pairs total: 1884 [2023-11-12 02:33:53,085 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-11-12 02:33:53,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:33:53,113 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;@2278dd4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:33:53,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-12 02:33:53,117 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:33:53,117 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-12 02:33:53,117 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:33:53,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:53,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:33:53,119 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)] === [2023-11-12 02:33:53,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash 428, now seen corresponding path program 1 times [2023-11-12 02:33:53,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:53,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281523091] [2023-11-12 02:33:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:53,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:53,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:53,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281523091] [2023-11-12 02:33:53,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281523091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:53,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:53,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:33:53,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812328949] [2023-11-12 02:33:53,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:53,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:33:53,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:53,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:33:53,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:33:53,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2023-11-12 02:33:53,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:53,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:53,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2023-11-12 02:33:53,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:53,460 INFO L124 PetriNetUnfolderBase]: 103/161 cut-off events. [2023-11-12 02:33:53,460 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:33:53,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 161 events. 103/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 400 event pairs, 60 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 324. Up to 162 conditions per place. [2023-11-12 02:33:53,465 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2023-11-12 02:33:53,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2023-11-12 02:33:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:33:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:33:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2023-11-12 02:33:53,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868995633187773 [2023-11-12 02:33:53,489 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 223 transitions. [2023-11-12 02:33:53,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 223 transitions. [2023-11-12 02:33:53,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:53,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 223 transitions. [2023-11-12 02:33:53,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:53,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:53,513 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:53,515 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 2 states and 223 transitions. [2023-11-12 02:33:53,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2023-11-12 02:33:53,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:33:53,521 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 36 flow [2023-11-12 02:33:53,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-11-12 02:33:53,529 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-11-12 02:33:53,529 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 36 flow [2023-11-12 02:33:53,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:53,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:53,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:33:53,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:33:53,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 02:33:53,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash 419435, now seen corresponding path program 1 times [2023-11-12 02:33:53,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:53,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419064993] [2023-11-12 02:33:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:53,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:53,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419064993] [2023-11-12 02:33:53,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419064993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:53,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:53,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:33:53,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204647934] [2023-11-12 02:33:53,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:53,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:53,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:53,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-12 02:33:53,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:53,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:53,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-12 02:33:53,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:54,029 INFO L124 PetriNetUnfolderBase]: 82/128 cut-off events. [2023-11-12 02:33:54,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:33:54,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 128 events. 82/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 287 event pairs, 34 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 264. Up to 101 conditions per place. [2023-11-12 02:33:54,039 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-12 02:33:54,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 88 flow [2023-11-12 02:33:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-11-12 02:33:54,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556040756914119 [2023-11-12 02:33:54,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-11-12 02:33:54,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-11-12 02:33:54,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:54,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-11-12 02:33:54,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,061 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 36 flow. Second operand 3 states and 313 transitions. [2023-11-12 02:33:54,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 88 flow [2023-11-12 02:33:54,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:33:54,067 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2023-11-12 02:33:54,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-11-12 02:33:54,069 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-11-12 02:33:54,070 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2023-11-12 02:33:54,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:54,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:33:54,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:33:54,071 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)] === [2023-11-12 02:33:54,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash 419434, now seen corresponding path program 1 times [2023-11-12 02:33:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:54,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724019255] [2023-11-12 02:33:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:54,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:54,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:54,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724019255] [2023-11-12 02:33:54,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724019255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:54,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:54,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:33:54,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988578844] [2023-11-12 02:33:54,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:54,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:54,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:54,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:54,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 229 [2023-11-12 02:33:54,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:54,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 229 [2023-11-12 02:33:54,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:54,360 INFO L124 PetriNetUnfolderBase]: 79/122 cut-off events. [2023-11-12 02:33:54,360 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:33:54,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 122 events. 79/122 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 267 event pairs, 32 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 262. Up to 95 conditions per place. [2023-11-12 02:33:54,363 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-11-12 02:33:54,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 88 flow [2023-11-12 02:33:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-11-12 02:33:54,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410480349344978 [2023-11-12 02:33:54,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-11-12 02:33:54,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-11-12 02:33:54,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:54,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-11-12 02:33:54,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,374 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 38 flow. Second operand 3 states and 303 transitions. [2023-11-12 02:33:54,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 88 flow [2023-11-12 02:33:54,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:33:54,376 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 36 flow [2023-11-12 02:33:54,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-11-12 02:33:54,378 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2023-11-12 02:33:54,378 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 36 flow [2023-11-12 02:33:54,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:54,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:33:54,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:33:54,386 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 02:33:54,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash -389203972, now seen corresponding path program 1 times [2023-11-12 02:33:54,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:54,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936381988] [2023-11-12 02:33:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:54,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:54,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:54,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936381988] [2023-11-12 02:33:54,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936381988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:54,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:54,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:33:54,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747578884] [2023-11-12 02:33:54,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:54,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:54,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:54,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 229 [2023-11-12 02:33:54,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:54,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 229 [2023-11-12 02:33:54,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:54,631 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-12 02:33:54,631 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:33:54,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 149 events. 97/149 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 333 event pairs, 20 based on Foata normal form. 9/117 useless extension candidates. Maximal degree in co-relation 316. Up to 91 conditions per place. [2023-11-12 02:33:54,633 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-12 02:33:54,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 92 flow [2023-11-12 02:33:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-11-12 02:33:54,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46142649199417757 [2023-11-12 02:33:54,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-11-12 02:33:54,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-11-12 02:33:54,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:54,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-11-12 02:33:54,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,643 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 36 flow. Second operand 3 states and 317 transitions. [2023-11-12 02:33:54,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 92 flow [2023-11-12 02:33:54,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:33:54,646 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 46 flow [2023-11-12 02:33:54,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-11-12 02:33:54,667 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-11-12 02:33:54,667 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 46 flow [2023-11-12 02:33:54,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:54,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:54,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:54,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:33:54,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 02:33:54,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash 819579052, now seen corresponding path program 1 times [2023-11-12 02:33:54,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:54,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759797192] [2023-11-12 02:33:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:54,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:54,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759797192] [2023-11-12 02:33:54,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759797192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106163869] [2023-11-12 02:33:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:54,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:54,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:54,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:54,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:33:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:54,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:33:54,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:54,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106163869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:54,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:54,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:33:54,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584714440] [2023-11-12 02:33:54,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:54,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:33:54,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:33:54,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:33:55,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-12 02:33:55,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 46 flow. Second operand has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:55,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:55,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-12 02:33:55,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:55,135 INFO L124 PetriNetUnfolderBase]: 151/230 cut-off events. [2023-11-12 02:33:55,136 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:33:55,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 230 events. 151/230 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 536 event pairs, 20 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 541. Up to 91 conditions per place. [2023-11-12 02:33:55,139 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 37 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-11-12 02:33:55,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 190 flow [2023-11-12 02:33:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:33:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:33:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2023-11-12 02:33:55,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585152838427948 [2023-11-12 02:33:55,143 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2023-11-12 02:33:55,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2023-11-12 02:33:55,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:55,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2023-11-12 02:33:55,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:55,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:55,151 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:55,152 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 46 flow. Second operand 6 states and 630 transitions. [2023-11-12 02:33:55,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 190 flow [2023-11-12 02:33:55,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:55,154 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 86 flow [2023-11-12 02:33:55,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-11-12 02:33:55,155 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2023-11-12 02:33:55,156 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 86 flow [2023-11-12 02:33:55,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:55,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:55,157 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:55,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:55,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:55,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 02:33:55,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:55,365 INFO L85 PathProgramCache]: Analyzing trace with hash -809245700, now seen corresponding path program 2 times [2023-11-12 02:33:55,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:55,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689023589] [2023-11-12 02:33:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:55,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:55,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:55,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689023589] [2023-11-12 02:33:55,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689023589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:55,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491518741] [2023-11-12 02:33:55,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:33:55,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:55,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:55,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:55,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:33:55,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:33:55,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:55,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:33:55,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:55,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:55,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491518741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:55,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:55,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:33:55,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446928652] [2023-11-12 02:33:55,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:55,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:33:55,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:33:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:33:55,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-12 02:33:55,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 86 flow. Second operand has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:55,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:55,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-12 02:33:55,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:56,104 INFO L124 PetriNetUnfolderBase]: 259/392 cut-off events. [2023-11-12 02:33:56,105 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2023-11-12 02:33:56,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1099 conditions, 392 events. 259/392 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 929 event pairs, 20 based on Foata normal form. 54/351 useless extension candidates. Maximal degree in co-relation 1091. Up to 118 conditions per place. [2023-11-12 02:33:56,110 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 73 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2023-11-12 02:33:56,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 84 transitions, 410 flow [2023-11-12 02:33:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:33:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:33:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1260 transitions. [2023-11-12 02:33:56,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585152838427948 [2023-11-12 02:33:56,117 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1260 transitions. [2023-11-12 02:33:56,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1260 transitions. [2023-11-12 02:33:56,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:56,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1260 transitions. [2023-11-12 02:33:56,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 105.0) internal successors, (1260), 12 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:56,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 229.0) internal successors, (2977), 13 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:56,131 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 229.0) internal successors, (2977), 13 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:56,132 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 86 flow. Second operand 12 states and 1260 transitions. [2023-11-12 02:33:56,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 84 transitions, 410 flow [2023-11-12 02:33:56,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 84 transitions, 396 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:56,140 INFO L231 Difference]: Finished difference. Result has 43 places, 24 transitions, 168 flow [2023-11-12 02:33:56,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=168, PETRI_PLACES=43, PETRI_TRANSITIONS=24} [2023-11-12 02:33:56,144 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2023-11-12 02:33:56,144 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 24 transitions, 168 flow [2023-11-12 02:33:56,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:56,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:56,146 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:56,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:33:56,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:56,352 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 02:33:56,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:56,353 INFO L85 PathProgramCache]: Analyzing trace with hash -190798340, now seen corresponding path program 3 times [2023-11-12 02:33:56,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:56,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817927245] [2023-11-12 02:33:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:56,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:56,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:56,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817927245] [2023-11-12 02:33:56,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817927245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:56,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660144103] [2023-11-12 02:33:56,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:33:56,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:56,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:56,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:56,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:33:56,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-12 02:33:56,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:56,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:33:56,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:56,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:57,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660144103] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:57,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:57,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-12 02:33:57,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107486908] [2023-11-12 02:33:57,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:57,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:33:57,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:57,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:33:57,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:33:57,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-12 02:33:57,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 24 transitions, 168 flow. Second operand has 25 states, 25 states have (on average 98.2) internal successors, (2455), 25 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:57,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:57,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-12 02:33:57,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:57,459 INFO L124 PetriNetUnfolderBase]: 475/716 cut-off events. [2023-11-12 02:33:57,459 INFO L125 PetriNetUnfolderBase]: For 4212/4212 co-relation queries the response was YES. [2023-11-12 02:33:57,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2285 conditions, 716 events. 475/716 cut-off events. For 4212/4212 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1728 event pairs, 20 based on Foata normal form. 108/657 useless extension candidates. Maximal degree in co-relation 2270. Up to 199 conditions per place. [2023-11-12 02:33:57,467 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 145 selfloop transitions, 23 changer transitions 0/168 dead transitions. [2023-11-12 02:33:57,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 168 transitions, 864 flow [2023-11-12 02:33:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:33:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-12 02:33:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2520 transitions. [2023-11-12 02:33:57,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585152838427948 [2023-11-12 02:33:57,477 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2520 transitions. [2023-11-12 02:33:57,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2520 transitions. [2023-11-12 02:33:57,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:57,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2520 transitions. [2023-11-12 02:33:57,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 105.0) internal successors, (2520), 24 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:57,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 229.0) internal successors, (5725), 25 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:57,499 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 229.0) internal successors, (5725), 25 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:57,500 INFO L175 Difference]: Start difference. First operand has 43 places, 24 transitions, 168 flow. Second operand 24 states and 2520 transitions. [2023-11-12 02:33:57,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 168 transitions, 864 flow [2023-11-12 02:33:57,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 168 transitions, 792 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-12 02:33:57,511 INFO L231 Difference]: Finished difference. Result has 73 places, 36 transitions, 312 flow [2023-11-12 02:33:57,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=312, PETRI_PLACES=73, PETRI_TRANSITIONS=36} [2023-11-12 02:33:57,512 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 50 predicate places. [2023-11-12 02:33:57,512 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 36 transitions, 312 flow [2023-11-12 02:33:57,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.2) internal successors, (2455), 25 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:57,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:57,514 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:57,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:57,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:57,720 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)] === [2023-11-12 02:33:57,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2094159364, now seen corresponding path program 4 times [2023-11-12 02:33:57,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:57,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051876681] [2023-11-12 02:33:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:57,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:59,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:59,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051876681] [2023-11-12 02:33:59,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051876681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:59,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970015489] [2023-11-12 02:33:59,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:33:59,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:59,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:59,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:59,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523915d0-44d8-4e81-9db0-bb17c69a54b4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:34:00,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:34:00,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:34:00,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-12 02:34:00,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:34:01,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:34:03,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970015489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:03,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:34:03,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2023-11-12 02:34:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142786326] [2023-11-12 02:34:03,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:03,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-12 02:34:03,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:03,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-12 02:34:03,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=4075, Unknown=0, NotChecked=0, Total=4970 [2023-11-12 02:34:06,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 229 [2023-11-12 02:34:06,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 36 transitions, 312 flow. Second operand has 71 states, 71 states have (on average 93.1830985915493) internal successors, (6616), 71 states have internal predecessors, (6616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:34:06,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:34:06,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 229 [2023-11-12 02:34:06,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand