./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:41:40,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:41:40,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:41:40,270 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:41:40,270 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:41:40,314 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:41:40,315 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:41:40,316 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:41:40,317 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:41:40,317 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:41:40,318 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:41:40,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:41:40,319 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:41:40,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:41:40,321 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:41:40,321 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:41:40,322 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:41:40,323 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:41:40,323 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:41:40,324 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:41:40,324 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:41:40,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:41:40,325 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:41:40,326 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:41:40,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:41:40,327 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:41:40,328 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:41:40,328 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:41:40,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:41:40,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:40,330 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:41:40,330 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:41:40,331 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:41:40,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:41:40,331 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:41:40,332 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:41:40,332 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:41:40,332 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:41:40,333 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_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 [2023-11-19 07:41:40,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:41:40,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:41:40,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:41:40,681 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:41:40,682 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:41:40,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/fib_safe-6.i [2023-11-19 07:41:43,850 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:41:44,134 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:41:44,135 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/sv-benchmarks/c/pthread/fib_safe-6.i [2023-11-19 07:41:44,151 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/data/c666f1018/524c0cf2587949c48e4741e1d10ad9dc/FLAG04beb8c38 [2023-11-19 07:41:44,170 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/data/c666f1018/524c0cf2587949c48e4741e1d10ad9dc [2023-11-19 07:41:44,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:41:44,180 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:41:44,181 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:44,182 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:41:44,186 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:41:44,190 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,191 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518800f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44, skipping insertion in model container [2023-11-19 07:41:44,192 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,260 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:41:44,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:44,659 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:41:44,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:44,772 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:41:44,772 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:41:44,781 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:41:44,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44 WrapperNode [2023-11-19 07:41:44,782 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:44,783 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:44,784 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:41:44,784 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:41:44,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,832 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,868 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-11-19 07:41:44,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:44,869 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:41:44,869 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:41:44,870 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:41:44,879 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,888 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,888 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,937 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,941 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,958 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:41:44,965 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:41:44,965 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:41:44,965 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:41:44,966 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (1/1) ... [2023-11-19 07:41:44,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:44,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:44,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:45,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:41:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:41:45,086 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:41:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:41:45,087 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:41:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:41:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:41:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:41:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:41:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:41:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:41:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:41:45,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:41:45,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:41:45,090 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:41:45,285 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:41:45,290 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:45,535 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:45,545 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:45,545 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:41:45,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:45 BoogieIcfgContainer [2023-11-19 07:41:45,550 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:45,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:41:45,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:41:45,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:41:45,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:44" (1/3) ... [2023-11-19 07:41:45,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506727c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:45, skipping insertion in model container [2023-11-19 07:41:45,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:44" (2/3) ... [2023-11-19 07:41:45,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506727c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:45, skipping insertion in model container [2023-11-19 07:41:45,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:45" (3/3) ... [2023-11-19 07:41:45,562 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2023-11-19 07:41:45,583 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:41:45,584 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 07:41:45,584 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:41:45,663 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:41:45,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 110 transitions, 228 flow [2023-11-19 07:41:45,758 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-19 07:41:45,759 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:41:45,765 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. [2023-11-19 07:41:45,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 110 transitions, 228 flow [2023-11-19 07:41:45,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 108 transitions, 222 flow [2023-11-19 07:41:45,774 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:41:45,785 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 108 transitions, 222 flow [2023-11-19 07:41:45,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 108 transitions, 222 flow [2023-11-19 07:41:45,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 222 flow [2023-11-19 07:41:45,825 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-19 07:41:45,825 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:41:45,827 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. [2023-11-19 07:41:45,830 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-11-19 07:41:50,418 INFO L134 LiptonReduction]: Checked pairs total: 1884 [2023-11-19 07:41:50,419 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-11-19 07:41:50,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:50,449 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@842d4d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:50,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 07:41:50,451 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:41:50,452 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:41:50,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:41:50,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:50,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:41:50,453 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)] === [2023-11-19 07:41:50,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash 428, now seen corresponding path program 1 times [2023-11-19 07:41:50,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:50,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178843086] [2023-11-19 07:41:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:50,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:50,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:50,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178843086] [2023-11-19 07:41:50,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178843086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:50,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:50,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:41:50,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393542645] [2023-11-19 07:41:50,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:50,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:41:50,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:41:50,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:41:50,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2023-11-19 07:41:50,650 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) [2023-11-19 07:41:50,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:50,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2023-11-19 07:41:50,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:50,754 INFO L124 PetriNetUnfolderBase]: 103/161 cut-off events. [2023-11-19 07:41:50,755 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:41:50,756 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. [2023-11-19 07:41:50,758 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2023-11-19 07:41:50,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2023-11-19 07:41:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:41:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:41:50,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2023-11-19 07:41:50,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868995633187773 [2023-11-19 07:41:50,777 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 223 transitions. [2023-11-19 07:41:50,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 223 transitions. [2023-11-19 07:41:50,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:50,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 223 transitions. [2023-11-19 07:41:50,786 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) [2023-11-19 07:41:50,792 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) [2023-11-19 07:41:50,793 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) [2023-11-19 07:41:50,795 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 2 states and 223 transitions. [2023-11-19 07:41:50,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2023-11-19 07:41:50,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:50,800 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 36 flow [2023-11-19 07:41:50,802 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} [2023-11-19 07:41:50,806 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-11-19 07:41:50,806 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 36 flow [2023-11-19 07:41:50,807 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) [2023-11-19 07:41:50,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:50,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:41:50,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:41:50,808 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)] === [2023-11-19 07:41:50,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash 419435, now seen corresponding path program 1 times [2023-11-19 07:41:50,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:50,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186366770] [2023-11-19 07:41:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:50,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:51,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:51,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186366770] [2023-11-19 07:41:51,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186366770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:51,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:51,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:41:51,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029243481] [2023-11-19 07:41:51,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:51,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:51,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:51,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:51,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-19 07:41:51,181 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) [2023-11-19 07:41:51,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:51,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-19 07:41:51,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:51,264 INFO L124 PetriNetUnfolderBase]: 82/128 cut-off events. [2023-11-19 07:41:51,264 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:41:51,268 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. [2023-11-19 07:41:51,272 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-19 07:41:51,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 88 flow [2023-11-19 07:41:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-11-19 07:41:51,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556040756914119 [2023-11-19 07:41:51,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-11-19 07:41:51,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-11-19 07:41:51,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:51,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-11-19 07:41:51,287 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) [2023-11-19 07:41:51,291 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) [2023-11-19 07:41:51,292 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) [2023-11-19 07:41:51,292 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 36 flow. Second operand 3 states and 313 transitions. [2023-11-19 07:41:51,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 88 flow [2023-11-19 07:41:51,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:41:51,297 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2023-11-19 07:41:51,298 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} [2023-11-19 07:41:51,299 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-11-19 07:41:51,299 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2023-11-19 07:41:51,300 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) [2023-11-19 07:41:51,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:51,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:41:51,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:41:51,302 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)] === [2023-11-19 07:41:51,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:51,311 INFO L85 PathProgramCache]: Analyzing trace with hash 419434, now seen corresponding path program 1 times [2023-11-19 07:41:51,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:51,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670136729] [2023-11-19 07:41:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:51,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:51,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670136729] [2023-11-19 07:41:51,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670136729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:51,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:51,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:41:51,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510165449] [2023-11-19 07:41:51,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:51,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:51,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:51,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:51,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 229 [2023-11-19 07:41:51,470 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) [2023-11-19 07:41:51,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:51,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 229 [2023-11-19 07:41:51,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:51,541 INFO L124 PetriNetUnfolderBase]: 79/122 cut-off events. [2023-11-19 07:41:51,541 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:41:51,541 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. [2023-11-19 07:41:51,543 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-11-19 07:41:51,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 88 flow [2023-11-19 07:41:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-11-19 07:41:51,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410480349344978 [2023-11-19 07:41:51,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-11-19 07:41:51,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-11-19 07:41:51,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:51,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-11-19 07:41:51,548 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) [2023-11-19 07:41:51,551 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) [2023-11-19 07:41:51,552 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) [2023-11-19 07:41:51,553 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 38 flow. Second operand 3 states and 303 transitions. [2023-11-19 07:41:51,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 88 flow [2023-11-19 07:41:51,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:51,554 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 36 flow [2023-11-19 07:41:51,555 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} [2023-11-19 07:41:51,556 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2023-11-19 07:41:51,556 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 36 flow [2023-11-19 07:41:51,557 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) [2023-11-19 07:41:51,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:51,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:41:51,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:41:51,558 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)] === [2023-11-19 07:41:51,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:51,558 INFO L85 PathProgramCache]: Analyzing trace with hash -389203972, now seen corresponding path program 1 times [2023-11-19 07:41:51,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:51,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721427324] [2023-11-19 07:41:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:51,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:51,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:51,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721427324] [2023-11-19 07:41:51,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721427324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:51,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:51,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:51,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505178443] [2023-11-19 07:41:51,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:51,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:51,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:51,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:51,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:51,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 229 [2023-11-19 07:41:51,644 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) [2023-11-19 07:41:51,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:51,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 229 [2023-11-19 07:41:51,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:51,801 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-19 07:41:51,801 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:41:51,801 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. [2023-11-19 07:41:51,803 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-19 07:41:51,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 92 flow [2023-11-19 07:41:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-11-19 07:41:51,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46142649199417757 [2023-11-19 07:41:51,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-11-19 07:41:51,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-11-19 07:41:51,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:51,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-11-19 07:41:51,808 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) [2023-11-19 07:41:51,811 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) [2023-11-19 07:41:51,812 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) [2023-11-19 07:41:51,812 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 36 flow. Second operand 3 states and 317 transitions. [2023-11-19 07:41:51,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 92 flow [2023-11-19 07:41:51,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:51,815 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 46 flow [2023-11-19 07:41:51,815 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} [2023-11-19 07:41:51,817 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-11-19 07:41:51,818 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 46 flow [2023-11-19 07:41:51,818 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) [2023-11-19 07:41:51,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:51,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:51,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:41:51,819 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)] === [2023-11-19 07:41:51,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:51,820 INFO L85 PathProgramCache]: Analyzing trace with hash 819579052, now seen corresponding path program 1 times [2023-11-19 07:41:51,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:51,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342538136] [2023-11-19 07:41:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:51,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:51,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:51,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342538136] [2023-11-19 07:41:51,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342538136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:51,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773727426] [2023-11-19 07:41:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:51,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:51,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:51,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:51,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:41:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:41:52,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:52,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:52,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773727426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:52,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:52,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:41:52,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776681400] [2023-11-19 07:41:52,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:52,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:52,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:52,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:52,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-19 07:41:52,219 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) [2023-11-19 07:41:52,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:52,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-19 07:41:52,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:52,352 INFO L124 PetriNetUnfolderBase]: 151/230 cut-off events. [2023-11-19 07:41:52,352 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:41:52,353 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. [2023-11-19 07:41:52,356 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 37 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-11-19 07:41:52,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 190 flow [2023-11-19 07:41:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:41:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:41:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2023-11-19 07:41:52,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585152838427948 [2023-11-19 07:41:52,360 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2023-11-19 07:41:52,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2023-11-19 07:41:52,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:52,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2023-11-19 07:41:52,363 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) [2023-11-19 07:41:52,367 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) [2023-11-19 07:41:52,369 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) [2023-11-19 07:41:52,369 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 46 flow. Second operand 6 states and 630 transitions. [2023-11-19 07:41:52,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 190 flow [2023-11-19 07:41:52,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:52,372 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 86 flow [2023-11-19 07:41:52,372 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} [2023-11-19 07:41:52,376 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2023-11-19 07:41:52,376 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 86 flow [2023-11-19 07:41:52,377 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) [2023-11-19 07:41:52,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:52,377 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:52,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:52,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:52,598 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)] === [2023-11-19 07:41:52,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:52,599 INFO L85 PathProgramCache]: Analyzing trace with hash -809245700, now seen corresponding path program 2 times [2023-11-19 07:41:52,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:52,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072252855] [2023-11-19 07:41:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:52,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:52,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:52,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072252855] [2023-11-19 07:41:52,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072252855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:52,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43348008] [2023-11-19 07:41:52,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:41:52,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:52,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:52,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:52,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:41:52,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:52,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:52,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:41:52,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:52,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:53,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43348008] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:53,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:53,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:41:53,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834047848] [2023-11-19 07:41:53,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:53,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:41:53,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:53,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:41:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:41:53,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-19 07:41:53,083 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) [2023-11-19 07:41:53,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:53,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-19 07:41:53,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:53,309 INFO L124 PetriNetUnfolderBase]: 259/392 cut-off events. [2023-11-19 07:41:53,309 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2023-11-19 07:41:53,311 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. [2023-11-19 07:41:53,314 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 73 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2023-11-19 07:41:53,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 84 transitions, 410 flow [2023-11-19 07:41:53,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:41:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:41:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1260 transitions. [2023-11-19 07:41:53,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585152838427948 [2023-11-19 07:41:53,321 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1260 transitions. [2023-11-19 07:41:53,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1260 transitions. [2023-11-19 07:41:53,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:53,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1260 transitions. [2023-11-19 07:41:53,327 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) [2023-11-19 07:41:53,334 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) [2023-11-19 07:41:53,336 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) [2023-11-19 07:41:53,336 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 86 flow. Second operand 12 states and 1260 transitions. [2023-11-19 07:41:53,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 84 transitions, 410 flow [2023-11-19 07:41:53,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 84 transitions, 396 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:53,342 INFO L231 Difference]: Finished difference. Result has 43 places, 24 transitions, 168 flow [2023-11-19 07:41:53,342 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} [2023-11-19 07:41:53,343 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2023-11-19 07:41:53,343 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 24 transitions, 168 flow [2023-11-19 07:41:53,344 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) [2023-11-19 07:41:53,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:53,344 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:53,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:53,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:53,564 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)] === [2023-11-19 07:41:53,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash -190798340, now seen corresponding path program 3 times [2023-11-19 07:41:53,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:53,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329059660] [2023-11-19 07:41:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:53,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:53,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:53,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329059660] [2023-11-19 07:41:53,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329059660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:53,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684359529] [2023-11-19 07:41:53,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:41:53,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:53,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:53,794 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:53,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:41:53,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 07:41:53,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:53,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:41:53,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:53,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:54,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684359529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:54,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:54,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2023-11-19 07:41:54,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741635803] [2023-11-19 07:41:54,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:54,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:41:54,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:54,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:41:54,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:41:54,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-19 07:41:54,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 24 transitions, 168 flow. Second operand has 17 states, 17 states have (on average 98.3529411764706) internal successors, (1672), 17 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:54,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:54,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-19 07:41:54,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:54,388 INFO L124 PetriNetUnfolderBase]: 331/500 cut-off events. [2023-11-19 07:41:54,389 INFO L125 PetriNetUnfolderBase]: For 1620/1620 co-relation queries the response was YES. [2023-11-19 07:41:54,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1637 conditions, 500 events. 331/500 cut-off events. For 1620/1620 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1197 event pairs, 20 based on Foata normal form. 36/417 useless extension candidates. Maximal degree in co-relation 1622. Up to 127 conditions per place. [2023-11-19 07:41:54,395 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 97 selfloop transitions, 15 changer transitions 0/112 dead transitions. [2023-11-19 07:41:54,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 112 transitions, 592 flow [2023-11-19 07:41:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:41:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:41:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1672 transitions. [2023-11-19 07:41:54,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45633187772925765 [2023-11-19 07:41:54,434 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1672 transitions. [2023-11-19 07:41:54,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1672 transitions. [2023-11-19 07:41:54,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:54,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1672 transitions. [2023-11-19 07:41:54,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 104.5) internal successors, (1672), 16 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:54,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 229.0) internal successors, (3893), 17 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:54,456 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 229.0) internal successors, (3893), 17 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:54,456 INFO L175 Difference]: Start difference. First operand has 43 places, 24 transitions, 168 flow. Second operand 16 states and 1672 transitions. [2023-11-19 07:41:54,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 112 transitions, 592 flow [2023-11-19 07:41:54,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 112 transitions, 536 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-11-19 07:41:54,467 INFO L231 Difference]: Finished difference. Result has 57 places, 28 transitions, 200 flow [2023-11-19 07:41:54,468 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=16, PETRI_FLOW=200, PETRI_PLACES=57, PETRI_TRANSITIONS=28} [2023-11-19 07:41:54,469 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 34 predicate places. [2023-11-19 07:41:54,469 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 28 transitions, 200 flow [2023-11-19 07:41:54,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.3529411764706) internal successors, (1672), 17 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:54,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:54,472 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:54,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:54,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:41:54,693 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)] === [2023-11-19 07:41:54,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash -936357380, now seen corresponding path program 4 times [2023-11-19 07:41:54,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:54,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369259336] [2023-11-19 07:41:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:54,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:55,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369259336] [2023-11-19 07:41:55,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369259336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130823784] [2023-11-19 07:41:55,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:41:55,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:55,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:55,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:55,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:41:55,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:41:55,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:55,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-19 07:41:56,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:56,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:57,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130823784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:57,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:57,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-11-19 07:41:57,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283206013] [2023-11-19 07:41:57,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:57,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-19 07:41:57,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-19 07:41:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1750, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 07:41:59,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 229 [2023-11-19 07:41:59,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 28 transitions, 200 flow. Second operand has 47 states, 47 states have (on average 93.27659574468085) internal successors, (4384), 47 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:59,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:59,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 229 [2023-11-19 07:41:59,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:24,024 INFO L124 PetriNetUnfolderBase]: 21853/32953 cut-off events. [2023-11-19 07:42:24,024 INFO L125 PetriNetUnfolderBase]: For 102059/102059 co-relation queries the response was YES. [2023-11-19 07:42:24,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115929 conditions, 32953 events. 21853/32953 cut-off events. For 102059/102059 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 218228 event pairs, 72 based on Foata normal form. 0/23859 useless extension candidates. Maximal degree in co-relation 115910. Up to 6940 conditions per place. [2023-11-19 07:42:24,492 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 996 selfloop transitions, 1624 changer transitions 0/2620 dead transitions. [2023-11-19 07:42:24,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 2620 transitions, 22867 flow [2023-11-19 07:42:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2023-11-19 07:42:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2023-11-19 07:42:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 21064 transitions. [2023-11-19 07:42:24,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43593617417579006 [2023-11-19 07:42:24,819 INFO L72 ComplementDD]: Start complementDD. Operand 211 states and 21064 transitions. [2023-11-19 07:42:24,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 211 states and 21064 transitions. [2023-11-19 07:42:24,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:24,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 211 states and 21064 transitions. [2023-11-19 07:42:24,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 212 states, 211 states have (on average 99.82938388625593) internal successors, (21064), 211 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:25,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 212 states, 212 states have (on average 229.0) internal successors, (48548), 212 states have internal predecessors, (48548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:25,080 INFO L81 ComplementDD]: Finished complementDD. Result has 212 states, 212 states have (on average 229.0) internal successors, (48548), 212 states have internal predecessors, (48548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:25,080 INFO L175 Difference]: Start difference. First operand has 57 places, 28 transitions, 200 flow. Second operand 211 states and 21064 transitions. [2023-11-19 07:42:25,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 2620 transitions, 22867 flow [2023-11-19 07:42:26,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 2620 transitions, 18865 flow, removed 1435 selfloop flow, removed 11 redundant places. [2023-11-19 07:42:26,145 INFO L231 Difference]: Finished difference. Result has 274 places, 1667 transitions, 12792 flow [2023-11-19 07:42:26,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=211, PETRI_FLOW=12792, PETRI_PLACES=274, PETRI_TRANSITIONS=1667} [2023-11-19 07:42:26,149 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 251 predicate places. [2023-11-19 07:42:26,149 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 1667 transitions, 12792 flow [2023-11-19 07:42:26,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 93.27659574468085) internal successors, (4384), 47 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:26,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:26,151 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:26,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:42:26,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c65227-4f39-496a-a9cb-bb0e11cc552e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:26,366 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:42:26,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash -936357370, now seen corresponding path program 1 times [2023-11-19 07:42:26,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:26,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236586061] [2023-11-19 07:42:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:26,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-19 07:42:26,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:26,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236586061] [2023-11-19 07:42:26,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236586061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:26,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:26,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:42:26,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298390988] [2023-11-19 07:42:26,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:26,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:26,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:26,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:26,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:26,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 229 [2023-11-19 07:42:26,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 1667 transitions, 12792 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:26,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:26,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 229 [2023-11-19 07:42:26,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand